./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-comm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:06:05,473 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:06:05,536 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:06:05,540 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:06:05,541 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:06:05,564 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:06:05,564 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:06:05,565 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:06:05,566 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:06:05,566 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:06:05,567 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:06:05,567 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:06:05,568 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:06:05,568 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:06:05,569 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:06:05,570 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:06:05,570 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:06:05,570 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:06:05,571 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:06:05,571 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:06:05,572 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:06:05,574 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:06:05,574 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:06:05,574 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:06:05,575 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:06:05,575 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:06:05,575 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:06:05,576 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:06:05,576 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:06:05,577 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:06:05,577 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:06:05,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:06:05,578 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:06:05,578 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:06:05,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:06:05,579 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:06:05,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:06:05,580 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:06:05,580 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:06:05,580 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:06:05,581 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:06:05,582 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:06:05,582 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 [2023-11-29 06:06:05,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:06:05,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:06:05,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:06:05,838 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:06:05,838 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:06:05,839 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/mult-comm.wvr.c [2023-11-29 06:06:08,657 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:06:08,822 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:06:08,822 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/sv-benchmarks/c/weaver/mult-comm.wvr.c [2023-11-29 06:06:08,830 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/data/55857c281/fd3fda1400bf4fc48e0cff7b1a57871a/FLAGf44a628b1 [2023-11-29 06:06:08,845 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/data/55857c281/fd3fda1400bf4fc48e0cff7b1a57871a [2023-11-29 06:06:08,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:06:08,849 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:06:08,850 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:06:08,850 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:06:08,856 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:06:08,856 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:06:08" (1/1) ... [2023-11-29 06:06:08,857 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a56cfd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:08, skipping insertion in model container [2023-11-29 06:06:08,858 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:06:08" (1/1) ... [2023-11-29 06:06:08,881 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:06:09,055 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/sv-benchmarks/c/weaver/mult-comm.wvr.c[1936,1949] [2023-11-29 06:06:09,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:06:09,070 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:06:09,089 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/sv-benchmarks/c/weaver/mult-comm.wvr.c[1936,1949] [2023-11-29 06:06:09,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:06:09,106 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:06:09,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09 WrapperNode [2023-11-29 06:06:09,106 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:06:09,107 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:06:09,108 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:06:09,108 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:06:09,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (1/1) ... [2023-11-29 06:06:09,123 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (1/1) ... [2023-11-29 06:06:09,143 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2023-11-29 06:06:09,143 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:06:09,144 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:06:09,144 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:06:09,144 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:06:09,156 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (1/1) ... [2023-11-29 06:06:09,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (1/1) ... [2023-11-29 06:06:09,159 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (1/1) ... [2023-11-29 06:06:09,174 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 06:06:09,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (1/1) ... [2023-11-29 06:06:09,174 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (1/1) ... [2023-11-29 06:06:09,180 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (1/1) ... [2023-11-29 06:06:09,184 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (1/1) ... [2023-11-29 06:06:09,185 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (1/1) ... [2023-11-29 06:06:09,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (1/1) ... [2023-11-29 06:06:09,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:06:09,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:06:09,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:06:09,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:06:09,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (1/1) ... [2023-11-29 06:06:09,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:06:09,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:09,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:06:09,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:06:09,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:06:09,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:06:09,254 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:06:09,254 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:06:09,254 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:06:09,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:06:09,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:06:09,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:06:09,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:06:09,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:06:09,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:06:09,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:06:09,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:06:09,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:06:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:06:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:06:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:06:09,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:06:09,258 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 06:06:09,371 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:06:09,373 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:06:09,517 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:06:09,637 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:06:09,637 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 06:06:09,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:06:09 BoogieIcfgContainer [2023-11-29 06:06:09,638 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:06:09,641 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:06:09,641 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:06:09,643 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:06:09,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:06:08" (1/3) ... [2023-11-29 06:06:09,644 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e95e401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:06:09, skipping insertion in model container [2023-11-29 06:06:09,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:06:09" (2/3) ... [2023-11-29 06:06:09,645 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e95e401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:06:09, skipping insertion in model container [2023-11-29 06:06:09,645 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:06:09" (3/3) ... [2023-11-29 06:06:09,646 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-11-29 06:06:09,654 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:06:09,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:06:09,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:06:09,662 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:06:09,701 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 06:06:09,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 52 flow [2023-11-29 06:06:09,755 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-11-29 06:06:09,755 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:06:09,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 2/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 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. [2023-11-29 06:06:09,758 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 19 transitions, 52 flow [2023-11-29 06:06:09,762 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 16 transitions, 44 flow [2023-11-29 06:06:09,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:06:09,777 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3904df9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:06:09,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 06:06:09,788 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:06:09,788 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-11-29 06:06:09,788 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:06:09,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:09,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:09,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:09,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:09,795 INFO L85 PathProgramCache]: Analyzing trace with hash -416623653, now seen corresponding path program 1 times [2023-11-29 06:06:09,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:09,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429900676] [2023-11-29 06:06:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:09,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:10,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:10,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429900676] [2023-11-29 06:06:10,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429900676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:06:10,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:06:10,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:06:10,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419628452] [2023-11-29 06:06:10,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:06:10,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:06:10,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:10,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:06:10,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:06:10,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:10,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 44 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) [2023-11-29 06:06:10,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:10,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:10,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:10,375 INFO L124 PetriNetUnfolderBase]: 74/135 cut-off events. [2023-11-29 06:06:10,375 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-29 06:06:10,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 135 events. 74/135 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 358 event pairs, 24 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-29 06:06:10,380 INFO L140 encePairwiseOnDemand]: 15/19 looper letters, 23 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-11-29 06:06:10,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 131 flow [2023-11-29 06:06:10,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:06:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:06:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2023-11-29 06:06:10,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6491228070175439 [2023-11-29 06:06:10,392 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 37 transitions. [2023-11-29 06:06:10,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 37 transitions. [2023-11-29 06:06:10,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:10,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 37 transitions. [2023-11-29 06:06:10,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:10,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:10,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:10,401 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 44 flow. Second operand 3 states and 37 transitions. [2023-11-29 06:06:10,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 131 flow [2023-11-29 06:06:10,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:06:10,406 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 55 flow [2023-11-29 06:06:10,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-29 06:06:10,411 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-29 06:06:10,411 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 55 flow [2023-11-29 06:06:10,412 INFO L496 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) [2023-11-29 06:06:10,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:10,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:10,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:06:10,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:10,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:10,413 INFO L85 PathProgramCache]: Analyzing trace with hash 287926024, now seen corresponding path program 1 times [2023-11-29 06:06:10,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:10,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235303774] [2023-11-29 06:06:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:10,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:10,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:10,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235303774] [2023-11-29 06:06:10,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235303774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:10,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233725713] [2023-11-29 06:06:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:10,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:10,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:10,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:10,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:06:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:10,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:06:10,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:11,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:11,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233725713] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:11,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:11,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-11-29 06:06:11,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738053699] [2023-11-29 06:06:11,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:11,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:06:11,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:06:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:06:11,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:11,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 55 flow. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:11,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:11,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:11,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:11,555 INFO L124 PetriNetUnfolderBase]: 76/144 cut-off events. [2023-11-29 06:06:11,555 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 06:06:11,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 144 events. 76/144 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 418 event pairs, 3 based on Foata normal form. 1/145 useless extension candidates. Maximal degree in co-relation 114. Up to 77 conditions per place. [2023-11-29 06:06:11,558 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 26 selfloop transitions, 11 changer transitions 17/55 dead transitions. [2023-11-29 06:06:11,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 55 transitions, 256 flow [2023-11-29 06:06:11,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:06:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:06:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 85 transitions. [2023-11-29 06:06:11,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2023-11-29 06:06:11,561 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 85 transitions. [2023-11-29 06:06:11,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 85 transitions. [2023-11-29 06:06:11,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:11,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 85 transitions. [2023-11-29 06:06:11,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2023-11-29 06:06:11,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:11,565 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:11,565 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 55 flow. Second operand 10 states and 85 transitions. [2023-11-29 06:06:11,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 55 transitions, 256 flow [2023-11-29 06:06:11,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 55 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:06:11,568 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 115 flow [2023-11-29 06:06:11,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=115, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-29 06:06:11,569 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-29 06:06:11,570 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 115 flow [2023-11-29 06:06:11,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:11,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:11,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:11,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:06:11,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 06:06:11,773 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:11,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash -876591693, now seen corresponding path program 1 times [2023-11-29 06:06:11,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:11,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282402452] [2023-11-29 06:06:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:11,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:12,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:12,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282402452] [2023-11-29 06:06:12,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282402452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:12,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397999965] [2023-11-29 06:06:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:12,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:12,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:12,017 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:12,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:06:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:12,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:06:12,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:12,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:12,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397999965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:12,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:12,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-11-29 06:06:12,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409482051] [2023-11-29 06:06:12,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:12,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:06:12,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:12,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:06:12,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:06:12,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:12,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 115 flow. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:12,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:12,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:12,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:12,604 INFO L124 PetriNetUnfolderBase]: 69/130 cut-off events. [2023-11-29 06:06:12,604 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-29 06:06:12,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 130 events. 69/130 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 333 event pairs, 11 based on Foata normal form. 1/131 useless extension candidates. Maximal degree in co-relation 388. Up to 73 conditions per place. [2023-11-29 06:06:12,606 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 22 selfloop transitions, 7 changer transitions 15/45 dead transitions. [2023-11-29 06:06:12,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 45 transitions, 261 flow [2023-11-29 06:06:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:06:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:06:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2023-11-29 06:06:12,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2023-11-29 06:06:12,608 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 60 transitions. [2023-11-29 06:06:12,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 60 transitions. [2023-11-29 06:06:12,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:12,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 60 transitions. [2023-11-29 06:06:12,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 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) [2023-11-29 06:06:12,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:12,611 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:12,611 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 115 flow. Second operand 6 states and 60 transitions. [2023-11-29 06:06:12,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 45 transitions, 261 flow [2023-11-29 06:06:12,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 45 transitions, 241 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-29 06:06:12,615 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 104 flow [2023-11-29 06:06:12,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-11-29 06:06:12,616 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-11-29 06:06:12,617 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 104 flow [2023-11-29 06:06:12,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:12,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:12,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:12,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:06:12,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:12,818 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:12,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:12,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1170675074, now seen corresponding path program 2 times [2023-11-29 06:06:12,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:12,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30838728] [2023-11-29 06:06:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:12,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:13,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:13,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30838728] [2023-11-29 06:06:13,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30838728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:13,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816836271] [2023-11-29 06:06:13,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:06:13,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:13,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:13,119 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:13,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:06:13,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:06:13,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:13,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:06:13,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:13,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:13,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816836271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:13,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:13,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2023-11-29 06:06:13,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514271109] [2023-11-29 06:06:13,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:13,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:06:13,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:13,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:06:13,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:06:13,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:13,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 104 flow. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:13,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:13,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:13,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:13,624 INFO L124 PetriNetUnfolderBase]: 113/213 cut-off events. [2023-11-29 06:06:13,624 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-11-29 06:06:13,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 213 events. 113/213 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 668 event pairs, 13 based on Foata normal form. 3/214 useless extension candidates. Maximal degree in co-relation 617. Up to 92 conditions per place. [2023-11-29 06:06:13,628 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 40 selfloop transitions, 18 changer transitions 12/71 dead transitions. [2023-11-29 06:06:13,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 71 transitions, 396 flow [2023-11-29 06:06:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:06:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:06:13,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2023-11-29 06:06:13,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210526315789473 [2023-11-29 06:06:13,632 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 99 transitions. [2023-11-29 06:06:13,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 99 transitions. [2023-11-29 06:06:13,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:13,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 99 transitions. [2023-11-29 06:06:13,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:13,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:13,634 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:13,635 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 104 flow. Second operand 10 states and 99 transitions. [2023-11-29 06:06:13,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 71 transitions, 396 flow [2023-11-29 06:06:13,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 71 transitions, 378 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-29 06:06:13,638 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 205 flow [2023-11-29 06:06:13,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=205, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-11-29 06:06:13,639 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2023-11-29 06:06:13,640 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 205 flow [2023-11-29 06:06:13,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:13,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:13,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:13,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:06:13,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:13,841 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:13,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash 725962322, now seen corresponding path program 3 times [2023-11-29 06:06:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:13,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542541646] [2023-11-29 06:06:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:13,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:14,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:14,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542541646] [2023-11-29 06:06:14,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542541646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486048013] [2023-11-29 06:06:14,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:06:14,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:14,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:14,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:06:14,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:06:14,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:14,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:06:14,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:14,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:14,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486048013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:14,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:14,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-11-29 06:06:14,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232795387] [2023-11-29 06:06:14,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:14,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:06:14,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:14,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:06:14,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:06:14,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:14,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 205 flow. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:14,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:14,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:14,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:14,508 INFO L124 PetriNetUnfolderBase]: 129/240 cut-off events. [2023-11-29 06:06:14,508 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2023-11-29 06:06:14,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 240 events. 129/240 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 799 event pairs, 23 based on Foata normal form. 2/240 useless extension candidates. Maximal degree in co-relation 819. Up to 178 conditions per place. [2023-11-29 06:06:14,512 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 41 selfloop transitions, 15 changer transitions 8/65 dead transitions. [2023-11-29 06:06:14,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 65 transitions, 442 flow [2023-11-29 06:06:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:06:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:06:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 77 transitions. [2023-11-29 06:06:14,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506578947368421 [2023-11-29 06:06:14,514 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 77 transitions. [2023-11-29 06:06:14,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 77 transitions. [2023-11-29 06:06:14,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:14,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 77 transitions. [2023-11-29 06:06:14,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 9.625) internal successors, (77), 8 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) [2023-11-29 06:06:14,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:14,516 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:14,516 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 205 flow. Second operand 8 states and 77 transitions. [2023-11-29 06:06:14,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 65 transitions, 442 flow [2023-11-29 06:06:14,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 387 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-11-29 06:06:14,523 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 250 flow [2023-11-29 06:06:14,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-11-29 06:06:14,524 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-11-29 06:06:14,524 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 250 flow [2023-11-29 06:06:14,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:14,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:14,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:14,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:06:14,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:14,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:14,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:14,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1659426031, now seen corresponding path program 2 times [2023-11-29 06:06:14,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:14,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78656115] [2023-11-29 06:06:14,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:14,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:14,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:14,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78656115] [2023-11-29 06:06:14,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78656115] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:14,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836898436] [2023-11-29 06:06:14,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:06:14,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:14,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:14,901 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:14,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:06:14,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:06:14,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:14,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:06:14,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:15,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836898436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:15,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:15,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-11-29 06:06:15,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879404064] [2023-11-29 06:06:15,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:15,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:06:15,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:06:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:06:15,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:15,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 250 flow. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 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) [2023-11-29 06:06:15,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:15,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:15,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:15,413 INFO L124 PetriNetUnfolderBase]: 161/298 cut-off events. [2023-11-29 06:06:15,414 INFO L125 PetriNetUnfolderBase]: For 696/696 co-relation queries the response was YES. [2023-11-29 06:06:15,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 298 events. 161/298 cut-off events. For 696/696 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1075 event pairs, 31 based on Foata normal form. 2/298 useless extension candidates. Maximal degree in co-relation 1031. Up to 236 conditions per place. [2023-11-29 06:06:15,418 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 51 selfloop transitions, 15 changer transitions 4/71 dead transitions. [2023-11-29 06:06:15,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 520 flow [2023-11-29 06:06:15,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:06:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:06:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 75 transitions. [2023-11-29 06:06:15,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934210526315789 [2023-11-29 06:06:15,419 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 75 transitions. [2023-11-29 06:06:15,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 75 transitions. [2023-11-29 06:06:15,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:15,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 75 transitions. [2023-11-29 06:06:15,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 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) [2023-11-29 06:06:15,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:15,422 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:15,422 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 250 flow. Second operand 8 states and 75 transitions. [2023-11-29 06:06:15,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 520 flow [2023-11-29 06:06:15,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 458 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-11-29 06:06:15,429 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 292 flow [2023-11-29 06:06:15,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-11-29 06:06:15,430 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-11-29 06:06:15,430 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 292 flow [2023-11-29 06:06:15,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 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) [2023-11-29 06:06:15,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:15,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:15,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:06:15,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:15,637 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:15,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:15,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1726562699, now seen corresponding path program 3 times [2023-11-29 06:06:15,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:15,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108136540] [2023-11-29 06:06:15,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:15,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:15,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:15,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108136540] [2023-11-29 06:06:15,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108136540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:15,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038622371] [2023-11-29 06:06:15,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:06:15,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:15,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:15,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:15,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:06:15,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:06:15,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:15,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:06:15,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:16,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:16,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038622371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:16,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:16,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 14 [2023-11-29 06:06:16,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080707205] [2023-11-29 06:06:16,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:16,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:06:16,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:16,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:06:16,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:06:16,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:16,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 292 flow. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:16,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:16,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:16,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:16,633 INFO L124 PetriNetUnfolderBase]: 275/510 cut-off events. [2023-11-29 06:06:16,633 INFO L125 PetriNetUnfolderBase]: For 843/843 co-relation queries the response was YES. [2023-11-29 06:06:16,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1834 conditions, 510 events. 275/510 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2233 event pairs, 43 based on Foata normal form. 2/510 useless extension candidates. Maximal degree in co-relation 1747. Up to 215 conditions per place. [2023-11-29 06:06:16,638 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 68 selfloop transitions, 44 changer transitions 13/126 dead transitions. [2023-11-29 06:06:16,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 126 transitions, 920 flow [2023-11-29 06:06:16,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:06:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:06:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 134 transitions. [2023-11-29 06:06:16,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037593984962406 [2023-11-29 06:06:16,640 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 134 transitions. [2023-11-29 06:06:16,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 134 transitions. [2023-11-29 06:06:16,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:16,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 134 transitions. [2023-11-29 06:06:16,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:16,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:16,643 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:16,643 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 292 flow. Second operand 14 states and 134 transitions. [2023-11-29 06:06:16,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 126 transitions, 920 flow [2023-11-29 06:06:16,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 126 transitions, 877 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-11-29 06:06:16,652 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 628 flow [2023-11-29 06:06:16,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=628, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2023-11-29 06:06:16,652 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-11-29 06:06:16,652 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 628 flow [2023-11-29 06:06:16,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:16,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:16,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:16,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:06:16,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:16,854 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:16,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash 885699366, now seen corresponding path program 1 times [2023-11-29 06:06:16,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:16,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366493036] [2023-11-29 06:06:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:16,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:17,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:17,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366493036] [2023-11-29 06:06:17,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366493036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:17,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524517011] [2023-11-29 06:06:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:17,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:17,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:17,384 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:17,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:06:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:17,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:06:17,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:17,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:18,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524517011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:18,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:18,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:06:18,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518326693] [2023-11-29 06:06:18,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:18,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:06:18,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:18,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:06:18,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:06:18,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:18,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 628 flow. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:18,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:18,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:18,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:20,421 INFO L124 PetriNetUnfolderBase]: 391/741 cut-off events. [2023-11-29 06:06:20,421 INFO L125 PetriNetUnfolderBase]: For 3129/3129 co-relation queries the response was YES. [2023-11-29 06:06:20,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3363 conditions, 741 events. 391/741 cut-off events. For 3129/3129 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3713 event pairs, 37 based on Foata normal form. 3/744 useless extension candidates. Maximal degree in co-relation 3222. Up to 354 conditions per place. [2023-11-29 06:06:20,429 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 103 selfloop transitions, 63 changer transitions 35/202 dead transitions. [2023-11-29 06:06:20,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 202 transitions, 1720 flow [2023-11-29 06:06:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 06:06:20,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 06:06:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 214 transitions. [2023-11-29 06:06:20,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692982456140351 [2023-11-29 06:06:20,431 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 214 transitions. [2023-11-29 06:06:20,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 214 transitions. [2023-11-29 06:06:20,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:20,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 214 transitions. [2023-11-29 06:06:20,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 8.916666666666666) internal successors, (214), 24 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:20,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 19.0) internal successors, (475), 25 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:20,435 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 19.0) internal successors, (475), 25 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:20,435 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 628 flow. Second operand 24 states and 214 transitions. [2023-11-29 06:06:20,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 202 transitions, 1720 flow [2023-11-29 06:06:20,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 202 transitions, 1587 flow, removed 59 selfloop flow, removed 4 redundant places. [2023-11-29 06:06:20,461 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 1023 flow [2023-11-29 06:06:20,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1023, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2023-11-29 06:06:20,462 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 81 predicate places. [2023-11-29 06:06:20,462 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 1023 flow [2023-11-29 06:06:20,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:20,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:20,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:20,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:06:20,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:20,664 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:20,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash -919466126, now seen corresponding path program 2 times [2023-11-29 06:06:20,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:20,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850153586] [2023-11-29 06:06:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:20,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:21,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850153586] [2023-11-29 06:06:21,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850153586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958406622] [2023-11-29 06:06:21,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:06:21,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:21,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:21,293 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:21,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:06:21,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:06:21,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:21,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:06:21,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:21,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:22,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958406622] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:22,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:22,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-29 06:06:22,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846559967] [2023-11-29 06:06:22,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:22,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:06:22,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:22,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:06:22,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:06:22,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:22,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 1023 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:22,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:22,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:22,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:26,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.36s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:06:27,353 INFO L124 PetriNetUnfolderBase]: 425/867 cut-off events. [2023-11-29 06:06:27,353 INFO L125 PetriNetUnfolderBase]: For 7430/7430 co-relation queries the response was YES. [2023-11-29 06:06:27,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 867 events. 425/867 cut-off events. For 7430/7430 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4873 event pairs, 35 based on Foata normal form. 4/867 useless extension candidates. Maximal degree in co-relation 4476. Up to 367 conditions per place. [2023-11-29 06:06:27,364 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 117 selfloop transitions, 93 changer transitions 22/233 dead transitions. [2023-11-29 06:06:27,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 233 transitions, 2391 flow [2023-11-29 06:06:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 06:06:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 06:06:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 256 transitions. [2023-11-29 06:06:27,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44912280701754387 [2023-11-29 06:06:27,367 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 256 transitions. [2023-11-29 06:06:27,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 256 transitions. [2023-11-29 06:06:27,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:27,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 256 transitions. [2023-11-29 06:06:27,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 8.533333333333333) internal successors, (256), 30 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:27,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 19.0) internal successors, (589), 31 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:27,371 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 19.0) internal successors, (589), 31 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:27,371 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 1023 flow. Second operand 30 states and 256 transitions. [2023-11-29 06:06:27,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 233 transitions, 2391 flow [2023-11-29 06:06:27,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 233 transitions, 2139 flow, removed 105 selfloop flow, removed 11 redundant places. [2023-11-29 06:06:27,409 INFO L231 Difference]: Finished difference. Result has 132 places, 144 transitions, 1580 flow [2023-11-29 06:06:27,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1580, PETRI_PLACES=132, PETRI_TRANSITIONS=144} [2023-11-29 06:06:27,410 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 111 predicate places. [2023-11-29 06:06:27,410 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 144 transitions, 1580 flow [2023-11-29 06:06:27,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:27,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:27,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:27,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:06:27,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 06:06:27,611 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:27,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:27,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1657157464, now seen corresponding path program 3 times [2023-11-29 06:06:27,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:27,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099521499] [2023-11-29 06:06:27,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:28,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:28,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099521499] [2023-11-29 06:06:28,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099521499] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:28,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645882284] [2023-11-29 06:06:28,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:06:28,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:28,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:28,214 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:28,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:06:28,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:06:28,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:28,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:06:28,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:28,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:28,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645882284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:28,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:28,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-29 06:06:28,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581477137] [2023-11-29 06:06:28,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:28,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:06:28,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:28,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:06:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:06:28,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:28,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 144 transitions, 1580 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:28,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:28,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:28,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:31,027 INFO L124 PetriNetUnfolderBase]: 406/805 cut-off events. [2023-11-29 06:06:31,027 INFO L125 PetriNetUnfolderBase]: For 9959/9959 co-relation queries the response was YES. [2023-11-29 06:06:31,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4802 conditions, 805 events. 406/805 cut-off events. For 9959/9959 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4320 event pairs, 39 based on Foata normal form. 4/807 useless extension candidates. Maximal degree in co-relation 4650. Up to 367 conditions per place. [2023-11-29 06:06:31,038 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 103 selfloop transitions, 92 changer transitions 17/213 dead transitions. [2023-11-29 06:06:31,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 213 transitions, 2346 flow [2023-11-29 06:06:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 06:06:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 06:06:31,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 214 transitions. [2023-11-29 06:06:31,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45052631578947366 [2023-11-29 06:06:31,040 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 214 transitions. [2023-11-29 06:06:31,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 214 transitions. [2023-11-29 06:06:31,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:31,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 214 transitions. [2023-11-29 06:06:31,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 8.56) internal successors, (214), 25 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:31,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 19.0) internal successors, (494), 26 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:31,044 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 19.0) internal successors, (494), 26 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:31,044 INFO L175 Difference]: Start difference. First operand has 132 places, 144 transitions, 1580 flow. Second operand 25 states and 214 transitions. [2023-11-29 06:06:31,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 213 transitions, 2346 flow [2023-11-29 06:06:31,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 213 transitions, 1992 flow, removed 151 selfloop flow, removed 14 redundant places. [2023-11-29 06:06:31,096 INFO L231 Difference]: Finished difference. Result has 142 places, 147 transitions, 1566 flow [2023-11-29 06:06:31,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1566, PETRI_PLACES=142, PETRI_TRANSITIONS=147} [2023-11-29 06:06:31,098 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 121 predicate places. [2023-11-29 06:06:31,098 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 147 transitions, 1566 flow [2023-11-29 06:06:31,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:31,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:31,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:31,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:06:31,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:06:31,299 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:31,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:31,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1130127026, now seen corresponding path program 4 times [2023-11-29 06:06:31,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:31,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77459519] [2023-11-29 06:06:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:31,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:31,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:31,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77459519] [2023-11-29 06:06:31,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77459519] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:31,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056657446] [2023-11-29 06:06:31,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:06:31,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:31,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:31,689 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:31,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:06:31,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:06:31,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:31,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:06:31,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:31,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:33,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056657446] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:33,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:33,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:06:33,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254459805] [2023-11-29 06:06:33,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:33,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:06:33,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:33,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:06:33,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:06:33,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:33,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 147 transitions, 1566 flow. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:33,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:33,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:33,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:34,152 INFO L124 PetriNetUnfolderBase]: 464/897 cut-off events. [2023-11-29 06:06:34,152 INFO L125 PetriNetUnfolderBase]: For 12218/12218 co-relation queries the response was YES. [2023-11-29 06:06:34,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5456 conditions, 897 events. 464/897 cut-off events. For 12218/12218 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4814 event pairs, 84 based on Foata normal form. 3/898 useless extension candidates. Maximal degree in co-relation 5330. Up to 746 conditions per place. [2023-11-29 06:06:34,167 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 160 selfloop transitions, 37 changer transitions 17/215 dead transitions. [2023-11-29 06:06:34,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 215 transitions, 2578 flow [2023-11-29 06:06:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:06:34,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:06:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 140 transitions. [2023-11-29 06:06:34,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2023-11-29 06:06:34,169 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 140 transitions. [2023-11-29 06:06:34,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 140 transitions. [2023-11-29 06:06:34,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:34,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 140 transitions. [2023-11-29 06:06:34,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.75) internal successors, (140), 16 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:34,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:34,171 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:34,171 INFO L175 Difference]: Start difference. First operand has 142 places, 147 transitions, 1566 flow. Second operand 16 states and 140 transitions. [2023-11-29 06:06:34,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 215 transitions, 2578 flow [2023-11-29 06:06:34,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 215 transitions, 2161 flow, removed 128 selfloop flow, removed 26 redundant places. [2023-11-29 06:06:34,227 INFO L231 Difference]: Finished difference. Result has 136 places, 169 transitions, 1705 flow [2023-11-29 06:06:34,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1705, PETRI_PLACES=136, PETRI_TRANSITIONS=169} [2023-11-29 06:06:34,228 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 115 predicate places. [2023-11-29 06:06:34,228 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 169 transitions, 1705 flow [2023-11-29 06:06:34,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:34,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:34,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:34,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:06:34,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:06:34,429 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:34,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:34,429 INFO L85 PathProgramCache]: Analyzing trace with hash 584072084, now seen corresponding path program 5 times [2023-11-29 06:06:34,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:34,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369997390] [2023-11-29 06:06:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:34,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:34,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:34,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369997390] [2023-11-29 06:06:34,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369997390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:34,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509578919] [2023-11-29 06:06:34,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:06:34,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:34,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:34,884 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:34,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:06:34,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:06:34,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:34,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:06:34,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:35,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:36,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509578919] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:36,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:36,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:06:36,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710993572] [2023-11-29 06:06:36,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:36,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:06:36,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:36,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:06:36,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:06:36,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:36,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 169 transitions, 1705 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:36,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:36,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:36,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:38,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:06:39,208 INFO L124 PetriNetUnfolderBase]: 496/971 cut-off events. [2023-11-29 06:06:39,208 INFO L125 PetriNetUnfolderBase]: For 6299/6299 co-relation queries the response was YES. [2023-11-29 06:06:39,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5464 conditions, 971 events. 496/971 cut-off events. For 6299/6299 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5380 event pairs, 90 based on Foata normal form. 3/972 useless extension candidates. Maximal degree in co-relation 5328. Up to 759 conditions per place. [2023-11-29 06:06:39,230 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 155 selfloop transitions, 53 changer transitions 13/222 dead transitions. [2023-11-29 06:06:39,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 222 transitions, 2537 flow [2023-11-29 06:06:39,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:06:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:06:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 143 transitions. [2023-11-29 06:06:39,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41812865497076024 [2023-11-29 06:06:39,231 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 143 transitions. [2023-11-29 06:06:39,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 143 transitions. [2023-11-29 06:06:39,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:39,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 143 transitions. [2023-11-29 06:06:39,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:39,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:39,233 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:39,233 INFO L175 Difference]: Start difference. First operand has 136 places, 169 transitions, 1705 flow. Second operand 18 states and 143 transitions. [2023-11-29 06:06:39,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 222 transitions, 2537 flow [2023-11-29 06:06:39,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 222 transitions, 2433 flow, removed 50 selfloop flow, removed 2 redundant places. [2023-11-29 06:06:39,258 INFO L231 Difference]: Finished difference. Result has 157 places, 182 transitions, 1999 flow [2023-11-29 06:06:39,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1999, PETRI_PLACES=157, PETRI_TRANSITIONS=182} [2023-11-29 06:06:39,259 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-11-29 06:06:39,259 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 182 transitions, 1999 flow [2023-11-29 06:06:39,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:39,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:39,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:39,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:06:39,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:39,460 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:39,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1223132305, now seen corresponding path program 4 times [2023-11-29 06:06:39,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:39,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956175598] [2023-11-29 06:06:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:39,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:39,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:39,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956175598] [2023-11-29 06:06:39,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956175598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:39,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395447321] [2023-11-29 06:06:39,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:06:39,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:39,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:39,652 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:39,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:06:39,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:06:39,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:39,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 06:06:39,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:39,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:40,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395447321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:40,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:40,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2023-11-29 06:06:40,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74535357] [2023-11-29 06:06:40,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:40,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:06:40,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:40,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:06:40,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:06:40,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:40,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 182 transitions, 1999 flow. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:40,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:40,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:40,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:40,893 INFO L124 PetriNetUnfolderBase]: 493/946 cut-off events. [2023-11-29 06:06:40,893 INFO L125 PetriNetUnfolderBase]: For 7406/7406 co-relation queries the response was YES. [2023-11-29 06:06:40,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5633 conditions, 946 events. 493/946 cut-off events. For 7406/7406 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5101 event pairs, 85 based on Foata normal form. 3/947 useless extension candidates. Maximal degree in co-relation 5534. Up to 828 conditions per place. [2023-11-29 06:06:40,907 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 163 selfloop transitions, 41 changer transitions 15/220 dead transitions. [2023-11-29 06:06:40,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 220 transitions, 2640 flow [2023-11-29 06:06:40,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:06:40,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:06:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 123 transitions. [2023-11-29 06:06:40,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40460526315789475 [2023-11-29 06:06:40,909 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 123 transitions. [2023-11-29 06:06:40,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 123 transitions. [2023-11-29 06:06:40,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:40,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 123 transitions. [2023-11-29 06:06:40,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.6875) internal successors, (123), 16 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:40,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:40,911 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:40,911 INFO L175 Difference]: Start difference. First operand has 157 places, 182 transitions, 1999 flow. Second operand 16 states and 123 transitions. [2023-11-29 06:06:40,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 220 transitions, 2640 flow [2023-11-29 06:06:40,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 220 transitions, 2501 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-11-29 06:06:40,943 INFO L231 Difference]: Finished difference. Result has 167 places, 186 transitions, 2064 flow [2023-11-29 06:06:40,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2064, PETRI_PLACES=167, PETRI_TRANSITIONS=186} [2023-11-29 06:06:40,944 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2023-11-29 06:06:40,944 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 186 transitions, 2064 flow [2023-11-29 06:06:40,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:40,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:40,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:40,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:06:41,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:06:41,145 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:41,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1944438898, now seen corresponding path program 6 times [2023-11-29 06:06:41,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:41,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978404215] [2023-11-29 06:06:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:41,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:41,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:41,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978404215] [2023-11-29 06:06:41,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978404215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:41,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160199583] [2023-11-29 06:06:41,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:06:41,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:41,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:41,615 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:41,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:06:41,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 06:06:41,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:41,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:06:41,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:41,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:42,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160199583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:42,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:42,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:06:42,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322011609] [2023-11-29 06:06:42,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:42,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:06:42,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:42,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:06:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:06:42,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:42,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 186 transitions, 2064 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:42,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:42,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:42,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:43,796 INFO L124 PetriNetUnfolderBase]: 519/985 cut-off events. [2023-11-29 06:06:43,796 INFO L125 PetriNetUnfolderBase]: For 7721/7721 co-relation queries the response was YES. [2023-11-29 06:06:43,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6090 conditions, 985 events. 519/985 cut-off events. For 7721/7721 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5322 event pairs, 89 based on Foata normal form. 2/985 useless extension candidates. Maximal degree in co-relation 5984. Up to 880 conditions per place. [2023-11-29 06:06:43,813 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 187 selfloop transitions, 43 changer transitions 7/238 dead transitions. [2023-11-29 06:06:43,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 238 transitions, 2999 flow [2023-11-29 06:06:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:06:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:06:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 137 transitions. [2023-11-29 06:06:43,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40058479532163743 [2023-11-29 06:06:43,815 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 137 transitions. [2023-11-29 06:06:43,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 137 transitions. [2023-11-29 06:06:43,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:43,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 137 transitions. [2023-11-29 06:06:43,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.611111111111111) internal successors, (137), 18 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:43,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:43,817 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:43,817 INFO L175 Difference]: Start difference. First operand has 167 places, 186 transitions, 2064 flow. Second operand 18 states and 137 transitions. [2023-11-29 06:06:43,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 238 transitions, 2999 flow [2023-11-29 06:06:43,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 238 transitions, 2884 flow, removed 22 selfloop flow, removed 13 redundant places. [2023-11-29 06:06:43,873 INFO L231 Difference]: Finished difference. Result has 176 places, 207 transitions, 2442 flow [2023-11-29 06:06:43,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2442, PETRI_PLACES=176, PETRI_TRANSITIONS=207} [2023-11-29 06:06:43,874 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2023-11-29 06:06:43,874 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 207 transitions, 2442 flow [2023-11-29 06:06:43,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:43,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:43,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:43,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 06:06:44,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:06:44,075 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:44,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:44,075 INFO L85 PathProgramCache]: Analyzing trace with hash 241555988, now seen corresponding path program 7 times [2023-11-29 06:06:44,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:44,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361344718] [2023-11-29 06:06:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:44,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:44,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:44,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361344718] [2023-11-29 06:06:44,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361344718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:44,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498754673] [2023-11-29 06:06:44,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:06:44,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:44,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:44,600 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:44,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:06:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:44,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:06:44,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:44,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:45,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498754673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:45,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:45,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:06:45,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153728979] [2023-11-29 06:06:45,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:45,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:06:45,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:45,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:06:45,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:06:45,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:45,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 207 transitions, 2442 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:45,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:45,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:45,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:47,144 INFO L124 PetriNetUnfolderBase]: 564/1075 cut-off events. [2023-11-29 06:06:47,144 INFO L125 PetriNetUnfolderBase]: For 10370/10370 co-relation queries the response was YES. [2023-11-29 06:06:47,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6931 conditions, 1075 events. 564/1075 cut-off events. For 10370/10370 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 5943 event pairs, 85 based on Foata normal form. 3/1076 useless extension candidates. Maximal degree in co-relation 6812. Up to 888 conditions per place. [2023-11-29 06:06:47,158 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 189 selfloop transitions, 60 changer transitions 10/260 dead transitions. [2023-11-29 06:06:47,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 260 transitions, 3390 flow [2023-11-29 06:06:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:06:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 06:06:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 159 transitions. [2023-11-29 06:06:47,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39849624060150374 [2023-11-29 06:06:47,160 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 159 transitions. [2023-11-29 06:06:47,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 159 transitions. [2023-11-29 06:06:47,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:47,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 159 transitions. [2023-11-29 06:06:47,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.571428571428571) internal successors, (159), 21 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:47,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:47,162 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 19.0) internal successors, (418), 22 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:47,162 INFO L175 Difference]: Start difference. First operand has 176 places, 207 transitions, 2442 flow. Second operand 21 states and 159 transitions. [2023-11-29 06:06:47,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 260 transitions, 3390 flow [2023-11-29 06:06:47,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 260 transitions, 3247 flow, removed 63 selfloop flow, removed 6 redundant places. [2023-11-29 06:06:47,229 INFO L231 Difference]: Finished difference. Result has 195 places, 220 transitions, 2732 flow [2023-11-29 06:06:47,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2732, PETRI_PLACES=195, PETRI_TRANSITIONS=220} [2023-11-29 06:06:47,230 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2023-11-29 06:06:47,231 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 220 transitions, 2732 flow [2023-11-29 06:06:47,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:47,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:47,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:47,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:06:47,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:06:47,432 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:47,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:47,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1476787718, now seen corresponding path program 8 times [2023-11-29 06:06:47,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:47,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045893924] [2023-11-29 06:06:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:47,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:47,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:47,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045893924] [2023-11-29 06:06:47,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045893924] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:47,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703798168] [2023-11-29 06:06:47,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:06:47,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:47,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:47,869 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:47,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:06:47,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:06:47,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:47,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:06:47,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:48,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:49,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703798168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:49,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:49,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:06:49,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895768069] [2023-11-29 06:06:49,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:49,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:06:49,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:49,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:06:49,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:06:49,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:49,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 220 transitions, 2732 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:49,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:49,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:49,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:51,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:06:51,841 INFO L124 PetriNetUnfolderBase]: 556/1062 cut-off events. [2023-11-29 06:06:51,841 INFO L125 PetriNetUnfolderBase]: For 10774/10774 co-relation queries the response was YES. [2023-11-29 06:06:51,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7027 conditions, 1062 events. 556/1062 cut-off events. For 10774/10774 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5890 event pairs, 83 based on Foata normal form. 3/1063 useless extension candidates. Maximal degree in co-relation 6917. Up to 890 conditions per place. [2023-11-29 06:06:51,855 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 195 selfloop transitions, 62 changer transitions 8/266 dead transitions. [2023-11-29 06:06:51,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 266 transitions, 3543 flow [2023-11-29 06:06:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 06:06:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 06:06:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 175 transitions. [2023-11-29 06:06:51,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40045766590389015 [2023-11-29 06:06:51,857 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 175 transitions. [2023-11-29 06:06:51,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 175 transitions. [2023-11-29 06:06:51,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:51,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 175 transitions. [2023-11-29 06:06:51,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.608695652173913) internal successors, (175), 23 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:51,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 19.0) internal successors, (456), 24 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:51,858 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 19.0) internal successors, (456), 24 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:51,858 INFO L175 Difference]: Start difference. First operand has 195 places, 220 transitions, 2732 flow. Second operand 23 states and 175 transitions. [2023-11-29 06:06:51,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 266 transitions, 3543 flow [2023-11-29 06:06:51,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 266 transitions, 3338 flow, removed 71 selfloop flow, removed 15 redundant places. [2023-11-29 06:06:51,906 INFO L231 Difference]: Finished difference. Result has 203 places, 224 transitions, 2803 flow [2023-11-29 06:06:51,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2561, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2803, PETRI_PLACES=203, PETRI_TRANSITIONS=224} [2023-11-29 06:06:51,906 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 182 predicate places. [2023-11-29 06:06:51,906 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 224 transitions, 2803 flow [2023-11-29 06:06:51,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:51,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:51,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:51,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:06:52,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:06:52,107 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:52,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:52,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1869216766, now seen corresponding path program 9 times [2023-11-29 06:06:52,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:52,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88613206] [2023-11-29 06:06:52,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:52,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:52,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:52,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88613206] [2023-11-29 06:06:52,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88613206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:52,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633938476] [2023-11-29 06:06:52,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:06:52,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:52,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:52,587 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:52,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:06:52,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:06:52,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:52,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:06:52,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:52,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:53,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633938476] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:53,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:53,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:06:53,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460592997] [2023-11-29 06:06:53,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:53,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:06:53,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:53,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:06:53,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:06:53,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:53,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 224 transitions, 2803 flow. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:53,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:53,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:53,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:55,256 INFO L124 PetriNetUnfolderBase]: 556/1059 cut-off events. [2023-11-29 06:06:55,256 INFO L125 PetriNetUnfolderBase]: For 10288/10288 co-relation queries the response was YES. [2023-11-29 06:06:55,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6947 conditions, 1059 events. 556/1059 cut-off events. For 10288/10288 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 5881 event pairs, 82 based on Foata normal form. 3/1060 useless extension candidates. Maximal degree in co-relation 6869. Up to 838 conditions per place. [2023-11-29 06:06:55,267 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 189 selfloop transitions, 67 changer transitions 10/267 dead transitions. [2023-11-29 06:06:55,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 267 transitions, 3547 flow [2023-11-29 06:06:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:06:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:06:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 149 transitions. [2023-11-29 06:06:55,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43567251461988304 [2023-11-29 06:06:55,269 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 149 transitions. [2023-11-29 06:06:55,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 149 transitions. [2023-11-29 06:06:55,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:55,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 149 transitions. [2023-11-29 06:06:55,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:55,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:55,271 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:55,271 INFO L175 Difference]: Start difference. First operand has 203 places, 224 transitions, 2803 flow. Second operand 18 states and 149 transitions. [2023-11-29 06:06:55,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 267 transitions, 3547 flow [2023-11-29 06:06:55,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 267 transitions, 3321 flow, removed 69 selfloop flow, removed 21 redundant places. [2023-11-29 06:06:55,318 INFO L231 Difference]: Finished difference. Result has 201 places, 228 transitions, 2815 flow [2023-11-29 06:06:55,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2815, PETRI_PLACES=201, PETRI_TRANSITIONS=228} [2023-11-29 06:06:55,318 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 180 predicate places. [2023-11-29 06:06:55,318 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 228 transitions, 2815 flow [2023-11-29 06:06:55,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:55,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:55,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:55,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 06:06:55,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:06:55,519 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:55,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:55,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1662045420, now seen corresponding path program 10 times [2023-11-29 06:06:55,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:55,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260158003] [2023-11-29 06:06:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:55,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:55,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:55,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260158003] [2023-11-29 06:06:55,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260158003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:55,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99064263] [2023-11-29 06:06:55,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:06:55,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:55,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:55,983 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:55,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:06:56,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:06:56,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:56,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:06:56,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:06:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:56,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:06:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:57,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99064263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:06:57,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:06:57,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:06:57,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711027543] [2023-11-29 06:06:57,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:06:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:06:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:06:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:06:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:06:57,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:06:57,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 228 transitions, 2815 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:57,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:06:57,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:06:57,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:06:59,051 INFO L124 PetriNetUnfolderBase]: 611/1178 cut-off events. [2023-11-29 06:06:59,051 INFO L125 PetriNetUnfolderBase]: For 13703/13703 co-relation queries the response was YES. [2023-11-29 06:06:59,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8036 conditions, 1178 events. 611/1178 cut-off events. For 13703/13703 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6718 event pairs, 87 based on Foata normal form. 3/1179 useless extension candidates. Maximal degree in co-relation 7957. Up to 953 conditions per place. [2023-11-29 06:06:59,065 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 228 selfloop transitions, 64 changer transitions 10/303 dead transitions. [2023-11-29 06:06:59,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 303 transitions, 4159 flow [2023-11-29 06:06:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 06:06:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 06:06:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 190 transitions. [2023-11-29 06:06:59,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-11-29 06:06:59,066 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 190 transitions. [2023-11-29 06:06:59,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 190 transitions. [2023-11-29 06:06:59,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:06:59,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 190 transitions. [2023-11-29 06:06:59,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.916666666666667) internal successors, (190), 24 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:59,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 19.0) internal successors, (475), 25 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:59,069 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 19.0) internal successors, (475), 25 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:59,069 INFO L175 Difference]: Start difference. First operand has 201 places, 228 transitions, 2815 flow. Second operand 24 states and 190 transitions. [2023-11-29 06:06:59,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 303 transitions, 4159 flow [2023-11-29 06:06:59,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 303 transitions, 3947 flow, removed 69 selfloop flow, removed 14 redundant places. [2023-11-29 06:06:59,145 INFO L231 Difference]: Finished difference. Result has 218 places, 252 transitions, 3289 flow [2023-11-29 06:06:59,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2614, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3289, PETRI_PLACES=218, PETRI_TRANSITIONS=252} [2023-11-29 06:06:59,146 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 197 predicate places. [2023-11-29 06:06:59,146 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 252 transitions, 3289 flow [2023-11-29 06:06:59,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:06:59,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:06:59,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:06:59,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:06:59,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:06:59,347 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:06:59,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:06:59,347 INFO L85 PathProgramCache]: Analyzing trace with hash -708078128, now seen corresponding path program 11 times [2023-11-29 06:06:59,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:06:59,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562614045] [2023-11-29 06:06:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:06:59,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:06:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:06:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:06:59,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:06:59,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562614045] [2023-11-29 06:06:59,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562614045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:06:59,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67583255] [2023-11-29 06:06:59,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:06:59,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:06:59,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:06:59,774 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:06:59,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:06:59,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:06:59,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:06:59,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:06:59,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:00,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:00,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67583255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:00,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:00,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-29 06:07:00,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004669974] [2023-11-29 06:07:00,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:00,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:07:00,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:00,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:07:00,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:07:00,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:00,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 252 transitions, 3289 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:00,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:00,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:00,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:02,069 INFO L124 PetriNetUnfolderBase]: 638/1254 cut-off events. [2023-11-29 06:07:02,069 INFO L125 PetriNetUnfolderBase]: For 16017/16017 co-relation queries the response was YES. [2023-11-29 06:07:02,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8571 conditions, 1254 events. 638/1254 cut-off events. For 16017/16017 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 7416 event pairs, 85 based on Foata normal form. 4/1256 useless extension candidates. Maximal degree in co-relation 8426. Up to 997 conditions per place. [2023-11-29 06:07:02,081 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 228 selfloop transitions, 82 changer transitions 15/326 dead transitions. [2023-11-29 06:07:02,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 326 transitions, 4609 flow [2023-11-29 06:07:02,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:07:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 06:07:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 181 transitions. [2023-11-29 06:07:02,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43301435406698563 [2023-11-29 06:07:02,082 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 181 transitions. [2023-11-29 06:07:02,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 181 transitions. [2023-11-29 06:07:02,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:02,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 181 transitions. [2023-11-29 06:07:02,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 8.227272727272727) internal successors, (181), 22 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:02,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 19.0) internal successors, (437), 23 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:02,084 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 19.0) internal successors, (437), 23 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:02,084 INFO L175 Difference]: Start difference. First operand has 218 places, 252 transitions, 3289 flow. Second operand 22 states and 181 transitions. [2023-11-29 06:07:02,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 326 transitions, 4609 flow [2023-11-29 06:07:02,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 326 transitions, 4163 flow, removed 185 selfloop flow, removed 21 redundant places. [2023-11-29 06:07:02,156 INFO L231 Difference]: Finished difference. Result has 226 places, 274 transitions, 3398 flow [2023-11-29 06:07:02,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3398, PETRI_PLACES=226, PETRI_TRANSITIONS=274} [2023-11-29 06:07:02,157 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 205 predicate places. [2023-11-29 06:07:02,157 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 274 transitions, 3398 flow [2023-11-29 06:07:02,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:02,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:02,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:02,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:07:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:02,358 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:02,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:02,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1438092632, now seen corresponding path program 12 times [2023-11-29 06:07:02,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:02,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832255605] [2023-11-29 06:07:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:02,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:02,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:02,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832255605] [2023-11-29 06:07:02,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832255605] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:02,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355762393] [2023-11-29 06:07:02,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:07:02,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:02,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:02,771 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:02,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:07:02,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 06:07:02,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:07:02,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:07:02,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:02,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:03,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355762393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:03,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:03,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:07:03,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293650473] [2023-11-29 06:07:03,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:03,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:07:03,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:07:03,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:07:03,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:03,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 274 transitions, 3398 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:03,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:03,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:03,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:04,845 INFO L124 PetriNetUnfolderBase]: 648/1262 cut-off events. [2023-11-29 06:07:04,846 INFO L125 PetriNetUnfolderBase]: For 18012/18012 co-relation queries the response was YES. [2023-11-29 06:07:04,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8647 conditions, 1262 events. 648/1262 cut-off events. For 18012/18012 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7422 event pairs, 99 based on Foata normal form. 2/1264 useless extension candidates. Maximal degree in co-relation 8460. Up to 1150 conditions per place. [2023-11-29 06:07:04,858 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 256 selfloop transitions, 45 changer transitions 7/309 dead transitions. [2023-11-29 06:07:04,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 309 transitions, 4386 flow [2023-11-29 06:07:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:07:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:07:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 122 transitions. [2023-11-29 06:07:04,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40131578947368424 [2023-11-29 06:07:04,860 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 122 transitions. [2023-11-29 06:07:04,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 122 transitions. [2023-11-29 06:07:04,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:04,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 122 transitions. [2023-11-29 06:07:04,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.625) internal successors, (122), 16 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:04,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:04,861 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 19.0) internal successors, (323), 17 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:04,862 INFO L175 Difference]: Start difference. First operand has 226 places, 274 transitions, 3398 flow. Second operand 16 states and 122 transitions. [2023-11-29 06:07:04,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 309 transitions, 4386 flow [2023-11-29 06:07:04,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 309 transitions, 4149 flow, removed 99 selfloop flow, removed 9 redundant places. [2023-11-29 06:07:04,954 INFO L231 Difference]: Finished difference. Result has 233 places, 282 transitions, 3524 flow [2023-11-29 06:07:04,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3524, PETRI_PLACES=233, PETRI_TRANSITIONS=282} [2023-11-29 06:07:04,954 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 212 predicate places. [2023-11-29 06:07:04,954 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 282 transitions, 3524 flow [2023-11-29 06:07:04,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:04,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:04,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:04,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-29 06:07:05,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:05,155 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:05,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:05,156 INFO L85 PathProgramCache]: Analyzing trace with hash 165662552, now seen corresponding path program 13 times [2023-11-29 06:07:05,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:05,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424662740] [2023-11-29 06:07:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:05,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:05,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:05,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424662740] [2023-11-29 06:07:05,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424662740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:05,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390921513] [2023-11-29 06:07:05,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:07:05,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:05,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:05,666 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:05,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:07:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:05,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:07:05,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:05,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:06,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390921513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:06,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:06,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-29 06:07:06,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457794389] [2023-11-29 06:07:06,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:06,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 06:07:06,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 06:07:06,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-11-29 06:07:06,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:06,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 282 transitions, 3524 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:06,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:06,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:06,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:08,764 INFO L124 PetriNetUnfolderBase]: 694/1367 cut-off events. [2023-11-29 06:07:08,764 INFO L125 PetriNetUnfolderBase]: For 25963/25963 co-relation queries the response was YES. [2023-11-29 06:07:08,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9794 conditions, 1367 events. 694/1367 cut-off events. For 25963/25963 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 8269 event pairs, 87 based on Foata normal form. 4/1371 useless extension candidates. Maximal degree in co-relation 9582. Up to 1016 conditions per place. [2023-11-29 06:07:08,780 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 248 selfloop transitions, 106 changer transitions 18/373 dead transitions. [2023-11-29 06:07:08,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 373 transitions, 5287 flow [2023-11-29 06:07:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:07:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 06:07:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 234 transitions. [2023-11-29 06:07:08,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398496240601504 [2023-11-29 06:07:08,782 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 234 transitions. [2023-11-29 06:07:08,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 234 transitions. [2023-11-29 06:07:08,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:08,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 234 transitions. [2023-11-29 06:07:08,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:08,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 19.0) internal successors, (551), 29 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:08,785 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 19.0) internal successors, (551), 29 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:08,785 INFO L175 Difference]: Start difference. First operand has 233 places, 282 transitions, 3524 flow. Second operand 28 states and 234 transitions. [2023-11-29 06:07:08,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 373 transitions, 5287 flow [2023-11-29 06:07:08,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 373 transitions, 5060 flow, removed 82 selfloop flow, removed 13 redundant places. [2023-11-29 06:07:08,972 INFO L231 Difference]: Finished difference. Result has 254 places, 300 transitions, 4171 flow [2023-11-29 06:07:08,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3313, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4171, PETRI_PLACES=254, PETRI_TRANSITIONS=300} [2023-11-29 06:07:08,973 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 233 predicate places. [2023-11-29 06:07:08,973 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 300 transitions, 4171 flow [2023-11-29 06:07:08,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:08,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:08,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:08,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 06:07:09,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:09,174 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:09,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:09,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1279532934, now seen corresponding path program 14 times [2023-11-29 06:07:09,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:09,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064295037] [2023-11-29 06:07:09,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:09,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:09,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:09,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064295037] [2023-11-29 06:07:09,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064295037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:09,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811970729] [2023-11-29 06:07:09,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:07:09,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:09,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:09,533 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:09,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:07:09,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:07:09,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:07:09,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:07:09,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:09,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:10,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811970729] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:10,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:10,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:07:10,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038683253] [2023-11-29 06:07:10,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:10,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:07:10,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:07:10,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:07:10,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:10,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 300 transitions, 4171 flow. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:10,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:10,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:10,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:12,029 INFO L124 PetriNetUnfolderBase]: 693/1362 cut-off events. [2023-11-29 06:07:12,029 INFO L125 PetriNetUnfolderBase]: For 28380/28380 co-relation queries the response was YES. [2023-11-29 06:07:12,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10104 conditions, 1362 events. 693/1362 cut-off events. For 28380/28380 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 8186 event pairs, 93 based on Foata normal form. 3/1365 useless extension candidates. Maximal degree in co-relation 9876. Up to 1126 conditions per place. [2023-11-29 06:07:12,043 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 266 selfloop transitions, 77 changer transitions 15/359 dead transitions. [2023-11-29 06:07:12,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 359 transitions, 5353 flow [2023-11-29 06:07:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 06:07:12,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 06:07:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 182 transitions. [2023-11-29 06:07:12,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41647597254004576 [2023-11-29 06:07:12,045 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 182 transitions. [2023-11-29 06:07:12,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 182 transitions. [2023-11-29 06:07:12,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:12,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 182 transitions. [2023-11-29 06:07:12,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:12,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 19.0) internal successors, (456), 24 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:12,047 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 19.0) internal successors, (456), 24 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:12,047 INFO L175 Difference]: Start difference. First operand has 254 places, 300 transitions, 4171 flow. Second operand 23 states and 182 transitions. [2023-11-29 06:07:12,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 359 transitions, 5353 flow [2023-11-29 06:07:12,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 359 transitions, 4715 flow, removed 256 selfloop flow, removed 20 redundant places. [2023-11-29 06:07:12,202 INFO L231 Difference]: Finished difference. Result has 261 places, 306 transitions, 3882 flow [2023-11-29 06:07:12,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3563, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3882, PETRI_PLACES=261, PETRI_TRANSITIONS=306} [2023-11-29 06:07:12,202 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-11-29 06:07:12,202 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 306 transitions, 3882 flow [2023-11-29 06:07:12,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:12,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:12,203 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:12,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 06:07:12,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:12,403 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:12,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash -235465069, now seen corresponding path program 4 times [2023-11-29 06:07:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:12,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152809947] [2023-11-29 06:07:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:12,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:12,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:12,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152809947] [2023-11-29 06:07:12,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152809947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:12,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220377144] [2023-11-29 06:07:12,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:07:12,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:12,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:12,613 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:12,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:07:12,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:07:12,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:07:12,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:07:12,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:12,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:07:12,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220377144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:12,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:12,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 12 [2023-11-29 06:07:12,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842547989] [2023-11-29 06:07:12,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:12,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:07:12,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:12,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:07:12,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:07:12,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:12,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 306 transitions, 3882 flow. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 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) [2023-11-29 06:07:12,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:12,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:12,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:13,542 INFO L124 PetriNetUnfolderBase]: 712/1384 cut-off events. [2023-11-29 06:07:13,542 INFO L125 PetriNetUnfolderBase]: For 23728/23728 co-relation queries the response was YES. [2023-11-29 06:07:13,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9843 conditions, 1384 events. 712/1384 cut-off events. For 23728/23728 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 8268 event pairs, 100 based on Foata normal form. 4/1388 useless extension candidates. Maximal degree in co-relation 9648. Up to 1166 conditions per place. [2023-11-29 06:07:13,555 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 279 selfloop transitions, 57 changer transitions 7/344 dead transitions. [2023-11-29 06:07:13,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 344 transitions, 4910 flow [2023-11-29 06:07:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:07:13,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:07:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 131 transitions. [2023-11-29 06:07:13,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45964912280701753 [2023-11-29 06:07:13,556 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 131 transitions. [2023-11-29 06:07:13,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 131 transitions. [2023-11-29 06:07:13,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:13,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 131 transitions. [2023-11-29 06:07:13,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 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) [2023-11-29 06:07:13,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 19.0) internal successors, (304), 16 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:13,558 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 19.0) internal successors, (304), 16 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:13,558 INFO L175 Difference]: Start difference. First operand has 261 places, 306 transitions, 3882 flow. Second operand 15 states and 131 transitions. [2023-11-29 06:07:13,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 344 transitions, 4910 flow [2023-11-29 06:07:13,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 344 transitions, 4760 flow, removed 45 selfloop flow, removed 16 redundant places. [2023-11-29 06:07:13,758 INFO L231 Difference]: Finished difference. Result has 260 places, 309 transitions, 3996 flow [2023-11-29 06:07:13,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3996, PETRI_PLACES=260, PETRI_TRANSITIONS=309} [2023-11-29 06:07:13,759 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 239 predicate places. [2023-11-29 06:07:13,759 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 309 transitions, 3996 flow [2023-11-29 06:07:13,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 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) [2023-11-29 06:07:13,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:13,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:13,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:07:13,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 06:07:13,960 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:13,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash -260286232, now seen corresponding path program 15 times [2023-11-29 06:07:13,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:13,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594122974] [2023-11-29 06:07:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:13,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:14,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:14,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594122974] [2023-11-29 06:07:14,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594122974] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:14,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656675963] [2023-11-29 06:07:14,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:07:14,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:14,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:14,430 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:14,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:07:14,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:07:14,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:07:14,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:07:14,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:14,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:15,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656675963] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:15,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:15,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:07:15,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771477122] [2023-11-29 06:07:15,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:15,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:07:15,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:15,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:07:15,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:07:15,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:15,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 309 transitions, 3996 flow. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:15,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:15,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:15,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:16,992 INFO L124 PetriNetUnfolderBase]: 756/1478 cut-off events. [2023-11-29 06:07:16,993 INFO L125 PetriNetUnfolderBase]: For 32506/32506 co-relation queries the response was YES. [2023-11-29 06:07:17,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11156 conditions, 1478 events. 756/1478 cut-off events. For 32506/32506 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 9039 event pairs, 107 based on Foata normal form. 3/1481 useless extension candidates. Maximal degree in co-relation 10867. Up to 1267 conditions per place. [2023-11-29 06:07:17,009 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 279 selfloop transitions, 67 changer transitions 10/357 dead transitions. [2023-11-29 06:07:17,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 357 transitions, 5329 flow [2023-11-29 06:07:17,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:07:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:07:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 139 transitions. [2023-11-29 06:07:17,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064327485380117 [2023-11-29 06:07:17,011 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 139 transitions. [2023-11-29 06:07:17,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 139 transitions. [2023-11-29 06:07:17,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:17,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 139 transitions. [2023-11-29 06:07:17,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.722222222222222) internal successors, (139), 18 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:17,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:17,012 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:17,012 INFO L175 Difference]: Start difference. First operand has 260 places, 309 transitions, 3996 flow. Second operand 18 states and 139 transitions. [2023-11-29 06:07:17,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 357 transitions, 5329 flow [2023-11-29 06:07:17,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 357 transitions, 5152 flow, removed 54 selfloop flow, removed 10 redundant places. [2023-11-29 06:07:17,204 INFO L231 Difference]: Finished difference. Result has 273 places, 322 transitions, 4413 flow [2023-11-29 06:07:17,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4413, PETRI_PLACES=273, PETRI_TRANSITIONS=322} [2023-11-29 06:07:17,204 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 252 predicate places. [2023-11-29 06:07:17,205 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 322 transitions, 4413 flow [2023-11-29 06:07:17,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:17,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:17,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:17,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:07:17,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 06:07:17,405 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:17,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:17,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1983133984, now seen corresponding path program 16 times [2023-11-29 06:07:17,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:17,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849616705] [2023-11-29 06:07:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:17,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:17,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:17,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849616705] [2023-11-29 06:07:17,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849616705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:17,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560937087] [2023-11-29 06:07:17,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:07:17,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:17,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:17,796 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:17,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:07:17,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:07:17,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:07:17,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:07:17,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:17,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:18,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560937087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:18,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:18,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:07:18,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578438528] [2023-11-29 06:07:18,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:18,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:07:18,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:18,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:07:18,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:07:18,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:18,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 322 transitions, 4413 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:18,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:18,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:18,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:20,533 INFO L124 PetriNetUnfolderBase]: 748/1465 cut-off events. [2023-11-29 06:07:20,533 INFO L125 PetriNetUnfolderBase]: For 31795/31795 co-relation queries the response was YES. [2023-11-29 06:07:20,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11159 conditions, 1465 events. 748/1465 cut-off events. For 31795/31795 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 8942 event pairs, 109 based on Foata normal form. 3/1468 useless extension candidates. Maximal degree in co-relation 10938. Up to 1269 conditions per place. [2023-11-29 06:07:20,548 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 281 selfloop transitions, 69 changer transitions 8/359 dead transitions. [2023-11-29 06:07:20,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 359 transitions, 5508 flow [2023-11-29 06:07:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:07:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:07:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 143 transitions. [2023-11-29 06:07:20,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41812865497076024 [2023-11-29 06:07:20,550 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 143 transitions. [2023-11-29 06:07:20,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 143 transitions. [2023-11-29 06:07:20,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:20,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 143 transitions. [2023-11-29 06:07:20,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 7.944444444444445) internal successors, (143), 18 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:20,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:20,552 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:20,552 INFO L175 Difference]: Start difference. First operand has 273 places, 322 transitions, 4413 flow. Second operand 18 states and 143 transitions. [2023-11-29 06:07:20,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 359 transitions, 5508 flow [2023-11-29 06:07:20,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 359 transitions, 5156 flow, removed 148 selfloop flow, removed 11 redundant places. [2023-11-29 06:07:20,722 INFO L231 Difference]: Finished difference. Result has 280 places, 326 transitions, 4450 flow [2023-11-29 06:07:20,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4149, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4450, PETRI_PLACES=280, PETRI_TRANSITIONS=326} [2023-11-29 06:07:20,723 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 259 predicate places. [2023-11-29 06:07:20,723 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 326 transitions, 4450 flow [2023-11-29 06:07:20,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:20,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:20,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:20,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 06:07:20,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 06:07:20,924 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:20,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:20,924 INFO L85 PathProgramCache]: Analyzing trace with hash 223984366, now seen corresponding path program 17 times [2023-11-29 06:07:20,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:20,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951634545] [2023-11-29 06:07:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:20,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:21,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:21,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951634545] [2023-11-29 06:07:21,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951634545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:21,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819144096] [2023-11-29 06:07:21,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:07:21,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:21,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:21,282 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:21,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 06:07:21,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:07:21,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:07:21,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:07:21,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:21,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:22,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819144096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:22,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:22,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:07:22,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920617812] [2023-11-29 06:07:22,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:22,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:07:22,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:07:22,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:07:22,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:22,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 326 transitions, 4450 flow. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:22,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:22,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:22,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:23,727 INFO L124 PetriNetUnfolderBase]: 761/1490 cut-off events. [2023-11-29 06:07:23,727 INFO L125 PetriNetUnfolderBase]: For 31103/31103 co-relation queries the response was YES. [2023-11-29 06:07:23,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11231 conditions, 1490 events. 761/1490 cut-off events. For 31103/31103 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 9111 event pairs, 109 based on Foata normal form. 3/1493 useless extension candidates. Maximal degree in co-relation 11130. Up to 1343 conditions per place. [2023-11-29 06:07:23,742 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 311 selfloop transitions, 46 changer transitions 9/367 dead transitions. [2023-11-29 06:07:23,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 367 transitions, 5414 flow [2023-11-29 06:07:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:07:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 06:07:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 145 transitions. [2023-11-29 06:07:23,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239766081871345 [2023-11-29 06:07:23,743 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 145 transitions. [2023-11-29 06:07:23,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 145 transitions. [2023-11-29 06:07:23,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:23,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 145 transitions. [2023-11-29 06:07:23,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 8.055555555555555) internal successors, (145), 18 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:23,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:23,745 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:23,745 INFO L175 Difference]: Start difference. First operand has 280 places, 326 transitions, 4450 flow. Second operand 18 states and 145 transitions. [2023-11-29 06:07:23,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 367 transitions, 5414 flow [2023-11-29 06:07:23,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 367 transitions, 5085 flow, removed 118 selfloop flow, removed 15 redundant places. [2023-11-29 06:07:23,901 INFO L231 Difference]: Finished difference. Result has 285 places, 329 transitions, 4304 flow [2023-11-29 06:07:23,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4133, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4304, PETRI_PLACES=285, PETRI_TRANSITIONS=329} [2023-11-29 06:07:23,902 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2023-11-29 06:07:23,902 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 329 transitions, 4304 flow [2023-11-29 06:07:23,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:23,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:23,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:23,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 06:07:24,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:24,103 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:24,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash 77725818, now seen corresponding path program 18 times [2023-11-29 06:07:24,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:24,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603173005] [2023-11-29 06:07:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:24,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:24,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603173005] [2023-11-29 06:07:24,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603173005] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:24,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803449995] [2023-11-29 06:07:24,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:07:24,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:24,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:24,565 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:24,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 06:07:24,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:07:24,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:07:24,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:07:24,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:24,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:25,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803449995] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:25,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:25,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-29 06:07:25,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112739328] [2023-11-29 06:07:25,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:25,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:07:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:25,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:07:25,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:07:25,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:25,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 329 transitions, 4304 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:25,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:25,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:25,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:27,058 INFO L124 PetriNetUnfolderBase]: 752/1460 cut-off events. [2023-11-29 06:07:27,058 INFO L125 PetriNetUnfolderBase]: For 26564/26564 co-relation queries the response was YES. [2023-11-29 06:07:27,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10643 conditions, 1460 events. 752/1460 cut-off events. For 26564/26564 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 8836 event pairs, 105 based on Foata normal form. 3/1463 useless extension candidates. Maximal degree in co-relation 10445. Up to 1259 conditions per place. [2023-11-29 06:07:27,074 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 292 selfloop transitions, 65 changer transitions 10/368 dead transitions. [2023-11-29 06:07:27,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 368 transitions, 5214 flow [2023-11-29 06:07:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:07:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 06:07:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 165 transitions. [2023-11-29 06:07:27,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39473684210526316 [2023-11-29 06:07:27,075 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 165 transitions. [2023-11-29 06:07:27,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 165 transitions. [2023-11-29 06:07:27,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:27,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 165 transitions. [2023-11-29 06:07:27,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:27,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 19.0) internal successors, (437), 23 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:27,077 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 19.0) internal successors, (437), 23 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:27,077 INFO L175 Difference]: Start difference. First operand has 285 places, 329 transitions, 4304 flow. Second operand 22 states and 165 transitions. [2023-11-29 06:07:27,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 368 transitions, 5214 flow [2023-11-29 06:07:27,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 368 transitions, 5084 flow, removed 22 selfloop flow, removed 17 redundant places. [2023-11-29 06:07:27,205 INFO L231 Difference]: Finished difference. Result has 291 places, 330 transitions, 4406 flow [2023-11-29 06:07:27,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4406, PETRI_PLACES=291, PETRI_TRANSITIONS=330} [2023-11-29 06:07:27,205 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 270 predicate places. [2023-11-29 06:07:27,205 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 330 transitions, 4406 flow [2023-11-29 06:07:27,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:27,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:27,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:27,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 06:07:27,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 06:07:27,406 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:27,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:27,406 INFO L85 PathProgramCache]: Analyzing trace with hash -547360185, now seen corresponding path program 19 times [2023-11-29 06:07:27,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:27,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382229486] [2023-11-29 06:07:27,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:27,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:28,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:28,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382229486] [2023-11-29 06:07:28,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382229486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:28,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889695315] [2023-11-29 06:07:28,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:07:28,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:28,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:28,381 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:28,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 06:07:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:28,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:07:28,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:29,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:30,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889695315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:30,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:30,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-11-29 06:07:30,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531573031] [2023-11-29 06:07:30,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:30,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:07:30,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:30,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:07:30,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:07:30,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:30,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 330 transitions, 4406 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:30,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:30,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:30,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:37,680 INFO L124 PetriNetUnfolderBase]: 825/1596 cut-off events. [2023-11-29 06:07:37,680 INFO L125 PetriNetUnfolderBase]: For 37574/37574 co-relation queries the response was YES. [2023-11-29 06:07:37,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12340 conditions, 1596 events. 825/1596 cut-off events. For 37574/37574 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 9929 event pairs, 49 based on Foata normal form. 4/1600 useless extension candidates. Maximal degree in co-relation 12128. Up to 1034 conditions per place. [2023-11-29 06:07:37,697 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 299 selfloop transitions, 121 changer transitions 28/449 dead transitions. [2023-11-29 06:07:37,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 449 transitions, 6643 flow [2023-11-29 06:07:37,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 06:07:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 06:07:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 275 transitions. [2023-11-29 06:07:37,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2023-11-29 06:07:37,699 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 275 transitions. [2023-11-29 06:07:37,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 275 transitions. [2023-11-29 06:07:37,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:37,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 275 transitions. [2023-11-29 06:07:37,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 8.333333333333334) internal successors, (275), 33 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:37,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 19.0) internal successors, (646), 34 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:37,701 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 19.0) internal successors, (646), 34 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:37,701 INFO L175 Difference]: Start difference. First operand has 291 places, 330 transitions, 4406 flow. Second operand 33 states and 275 transitions. [2023-11-29 06:07:37,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 449 transitions, 6643 flow [2023-11-29 06:07:37,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 449 transitions, 6470 flow, removed 36 selfloop flow, removed 18 redundant places. [2023-11-29 06:07:37,880 INFO L231 Difference]: Finished difference. Result has 314 places, 357 transitions, 5270 flow [2023-11-29 06:07:37,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5270, PETRI_PLACES=314, PETRI_TRANSITIONS=357} [2023-11-29 06:07:37,881 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 293 predicate places. [2023-11-29 06:07:37,881 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 357 transitions, 5270 flow [2023-11-29 06:07:37,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:37,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:37,881 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:37,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 06:07:38,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 06:07:38,082 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:38,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:38,082 INFO L85 PathProgramCache]: Analyzing trace with hash 935864290, now seen corresponding path program 5 times [2023-11-29 06:07:38,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:38,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515055949] [2023-11-29 06:07:38,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:38,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:38,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:38,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515055949] [2023-11-29 06:07:38,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515055949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473930831] [2023-11-29 06:07:38,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:07:38,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:38,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:38,283 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:38,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 06:07:38,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:07:38,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:07:38,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:07:38,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:38,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473930831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:38,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:38,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2023-11-29 06:07:38,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655877303] [2023-11-29 06:07:38,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:07:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:38,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:07:38,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:07:38,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:38,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 357 transitions, 5270 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) [2023-11-29 06:07:38,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:38,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:38,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:40,495 INFO L124 PetriNetUnfolderBase]: 790/1545 cut-off events. [2023-11-29 06:07:40,495 INFO L125 PetriNetUnfolderBase]: For 37967/37967 co-relation queries the response was YES. [2023-11-29 06:07:40,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12292 conditions, 1545 events. 790/1545 cut-off events. For 37967/37967 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 9607 event pairs, 58 based on Foata normal form. 3/1548 useless extension candidates. Maximal degree in co-relation 12176. Up to 1204 conditions per place. [2023-11-29 06:07:40,512 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 300 selfloop transitions, 86 changer transitions 21/408 dead transitions. [2023-11-29 06:07:40,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 408 transitions, 6477 flow [2023-11-29 06:07:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:07:40,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:07:40,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 161 transitions. [2023-11-29 06:07:40,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44598337950138506 [2023-11-29 06:07:40,514 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 161 transitions. [2023-11-29 06:07:40,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 161 transitions. [2023-11-29 06:07:40,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:40,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 161 transitions. [2023-11-29 06:07:40,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.473684210526315) internal successors, (161), 19 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:40,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:40,515 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 19.0) internal successors, (380), 20 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:40,515 INFO L175 Difference]: Start difference. First operand has 314 places, 357 transitions, 5270 flow. Second operand 19 states and 161 transitions. [2023-11-29 06:07:40,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 408 transitions, 6477 flow [2023-11-29 06:07:40,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 408 transitions, 5705 flow, removed 348 selfloop flow, removed 15 redundant places. [2023-11-29 06:07:40,700 INFO L231 Difference]: Finished difference. Result has 317 places, 354 transitions, 4825 flow [2023-11-29 06:07:40,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4642, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4825, PETRI_PLACES=317, PETRI_TRANSITIONS=354} [2023-11-29 06:07:40,701 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 296 predicate places. [2023-11-29 06:07:40,701 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 354 transitions, 4825 flow [2023-11-29 06:07:40,701 INFO L496 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) [2023-11-29 06:07:40,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:40,701 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:40,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 06:07:40,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 06:07:40,902 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:40,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:40,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1840104000, now seen corresponding path program 6 times [2023-11-29 06:07:40,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:40,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745340791] [2023-11-29 06:07:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:40,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:41,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:41,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745340791] [2023-11-29 06:07:41,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745340791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:41,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856655736] [2023-11-29 06:07:41,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:07:41,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:41,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:41,109 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:41,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 06:07:41,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:07:41,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:07:41,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:07:41,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:41,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:45,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856655736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:45,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:45,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-11-29 06:07:45,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097022879] [2023-11-29 06:07:45,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:45,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:07:45,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:07:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:07:45,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:45,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 354 transitions, 4825 flow. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:45,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:45,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:45,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:47,125 INFO L124 PetriNetUnfolderBase]: 798/1555 cut-off events. [2023-11-29 06:07:47,125 INFO L125 PetriNetUnfolderBase]: For 29914/29914 co-relation queries the response was YES. [2023-11-29 06:07:47,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11664 conditions, 1555 events. 798/1555 cut-off events. For 29914/29914 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 9679 event pairs, 62 based on Foata normal form. 2/1557 useless extension candidates. Maximal degree in co-relation 11496. Up to 1187 conditions per place. [2023-11-29 06:07:47,144 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 308 selfloop transitions, 84 changer transitions 8/401 dead transitions. [2023-11-29 06:07:47,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 401 transitions, 6077 flow [2023-11-29 06:07:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:07:47,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:07:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 133 transitions. [2023-11-29 06:07:47,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-11-29 06:07:47,146 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 133 transitions. [2023-11-29 06:07:47,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 133 transitions. [2023-11-29 06:07:47,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:47,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 133 transitions. [2023-11-29 06:07:47,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:47,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 19.0) internal successors, (304), 16 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:47,147 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 19.0) internal successors, (304), 16 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:47,147 INFO L175 Difference]: Start difference. First operand has 317 places, 354 transitions, 4825 flow. Second operand 15 states and 133 transitions. [2023-11-29 06:07:47,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 401 transitions, 6077 flow [2023-11-29 06:07:47,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 401 transitions, 5907 flow, removed 20 selfloop flow, removed 14 redundant places. [2023-11-29 06:07:47,314 INFO L231 Difference]: Finished difference. Result has 316 places, 362 transitions, 5114 flow [2023-11-29 06:07:47,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4659, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5114, PETRI_PLACES=316, PETRI_TRANSITIONS=362} [2023-11-29 06:07:47,315 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 295 predicate places. [2023-11-29 06:07:47,315 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 362 transitions, 5114 flow [2023-11-29 06:07:47,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:47,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:47,316 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:47,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 06:07:47,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:47,516 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:47,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:47,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1340164408, now seen corresponding path program 20 times [2023-11-29 06:07:47,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:47,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053735055] [2023-11-29 06:07:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:47,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:48,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:48,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053735055] [2023-11-29 06:07:48,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053735055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:48,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162061008] [2023-11-29 06:07:48,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:07:48,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:48,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:48,459 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:48,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 06:07:48,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:07:48,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:07:48,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:07:48,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:48,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:50,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162061008] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:50,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:50,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2023-11-29 06:07:50,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422175474] [2023-11-29 06:07:50,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:50,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:07:50,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:50,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:07:50,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:07:50,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:50,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 362 transitions, 5114 flow. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:50,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:50,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:50,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:54,851 INFO L124 PetriNetUnfolderBase]: 813/1588 cut-off events. [2023-11-29 06:07:54,852 INFO L125 PetriNetUnfolderBase]: For 33286/33286 co-relation queries the response was YES. [2023-11-29 06:07:54,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12197 conditions, 1588 events. 813/1588 cut-off events. For 33286/33286 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 9991 event pairs, 53 based on Foata normal form. 4/1592 useless extension candidates. Maximal degree in co-relation 11976. Up to 1131 conditions per place. [2023-11-29 06:07:54,869 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 295 selfloop transitions, 129 changer transitions 15/440 dead transitions. [2023-11-29 06:07:54,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 440 transitions, 6423 flow [2023-11-29 06:07:54,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 06:07:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 06:07:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 245 transitions. [2023-11-29 06:07:54,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2023-11-29 06:07:54,870 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 245 transitions. [2023-11-29 06:07:54,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 245 transitions. [2023-11-29 06:07:54,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:54,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 245 transitions. [2023-11-29 06:07:54,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 8.166666666666666) internal successors, (245), 30 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:54,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 19.0) internal successors, (589), 31 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:54,872 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 19.0) internal successors, (589), 31 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:54,872 INFO L175 Difference]: Start difference. First operand has 316 places, 362 transitions, 5114 flow. Second operand 30 states and 245 transitions. [2023-11-29 06:07:54,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 440 transitions, 6423 flow [2023-11-29 06:07:55,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 440 transitions, 6167 flow, removed 79 selfloop flow, removed 10 redundant places. [2023-11-29 06:07:55,063 INFO L231 Difference]: Finished difference. Result has 338 places, 365 transitions, 5237 flow [2023-11-29 06:07:55,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4865, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5237, PETRI_PLACES=338, PETRI_TRANSITIONS=365} [2023-11-29 06:07:55,064 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 317 predicate places. [2023-11-29 06:07:55,064 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 365 transitions, 5237 flow [2023-11-29 06:07:55,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:55,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:55,064 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:55,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 06:07:55,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 06:07:55,265 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:55,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:55,265 INFO L85 PathProgramCache]: Analyzing trace with hash -137221090, now seen corresponding path program 7 times [2023-11-29 06:07:55,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:55,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020145693] [2023-11-29 06:07:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:55,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:55,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:55,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020145693] [2023-11-29 06:07:55,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020145693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:55,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579707615] [2023-11-29 06:07:55,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:07:55,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:55,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:55,413 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:55,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 06:07:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:55,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:07:55,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:55,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:07:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:56,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579707615] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:07:56,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:07:56,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 21 [2023-11-29 06:07:56,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536890072] [2023-11-29 06:07:56,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:07:56,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:07:56,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:07:56,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:07:56,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:07:56,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:07:56,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 365 transitions, 5237 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) [2023-11-29 06:07:56,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:07:56,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:07:56,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:07:58,174 INFO L124 PetriNetUnfolderBase]: 842/1641 cut-off events. [2023-11-29 06:07:58,174 INFO L125 PetriNetUnfolderBase]: For 29999/29999 co-relation queries the response was YES. [2023-11-29 06:07:58,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12610 conditions, 1641 events. 842/1641 cut-off events. For 29999/29999 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 10409 event pairs, 27 based on Foata normal form. 3/1644 useless extension candidates. Maximal degree in co-relation 12378. Up to 744 conditions per place. [2023-11-29 06:07:58,202 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 227 selfloop transitions, 212 changer transitions 13/453 dead transitions. [2023-11-29 06:07:58,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 453 transitions, 6971 flow [2023-11-29 06:07:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 06:07:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 06:07:58,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 230 transitions. [2023-11-29 06:07:58,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2023-11-29 06:07:58,204 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 230 transitions. [2023-11-29 06:07:58,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 230 transitions. [2023-11-29 06:07:58,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:07:58,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 230 transitions. [2023-11-29 06:07:58,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 7.666666666666667) internal successors, (230), 30 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:58,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 19.0) internal successors, (589), 31 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:58,206 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 19.0) internal successors, (589), 31 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:07:58,206 INFO L175 Difference]: Start difference. First operand has 338 places, 365 transitions, 5237 flow. Second operand 30 states and 230 transitions. [2023-11-29 06:07:58,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 453 transitions, 6971 flow [2023-11-29 06:07:58,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 453 transitions, 6654 flow, removed 54 selfloop flow, removed 26 redundant places. [2023-11-29 06:07:58,397 INFO L231 Difference]: Finished difference. Result has 345 places, 386 transitions, 6162 flow [2023-11-29 06:07:58,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4926, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6162, PETRI_PLACES=345, PETRI_TRANSITIONS=386} [2023-11-29 06:07:58,398 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 324 predicate places. [2023-11-29 06:07:58,398 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 386 transitions, 6162 flow [2023-11-29 06:07:58,398 INFO L496 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) [2023-11-29 06:07:58,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:07:58,398 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:07:58,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 06:07:58,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 06:07:58,599 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:07:58,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:07:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1264617183, now seen corresponding path program 21 times [2023-11-29 06:07:58,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:07:58,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215747546] [2023-11-29 06:07:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:07:58,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:07:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:07:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:59,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:07:59,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215747546] [2023-11-29 06:07:59,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215747546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:07:59,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788835747] [2023-11-29 06:07:59,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:07:59,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:07:59,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:07:59,341 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:07:59,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 06:07:59,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:07:59,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:07:59,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:07:59,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:07:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:07:59,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:08:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:08:00,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788835747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:08:00,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:08:00,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2023-11-29 06:08:00,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031072254] [2023-11-29 06:08:00,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:08:00,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:08:00,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:08:00,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:08:00,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:08:00,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:08:00,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 386 transitions, 6162 flow. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:08:00,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:08:00,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:08:00,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:08:04,502 INFO L124 PetriNetUnfolderBase]: 860/1662 cut-off events. [2023-11-29 06:08:04,502 INFO L125 PetriNetUnfolderBase]: For 40122/40122 co-relation queries the response was YES. [2023-11-29 06:08:04,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14006 conditions, 1662 events. 860/1662 cut-off events. For 40122/40122 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 10452 event pairs, 89 based on Foata normal form. 2/1664 useless extension candidates. Maximal degree in co-relation 13789. Up to 1298 conditions per place. [2023-11-29 06:08:04,523 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 316 selfloop transitions, 122 changer transitions 9/448 dead transitions. [2023-11-29 06:08:04,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 448 transitions, 8007 flow [2023-11-29 06:08:04,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:08:04,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 06:08:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 212 transitions. [2023-11-29 06:08:04,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39849624060150374 [2023-11-29 06:08:04,524 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 212 transitions. [2023-11-29 06:08:04,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 212 transitions. [2023-11-29 06:08:04,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:08:04,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 212 transitions. [2023-11-29 06:08:04,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 7.571428571428571) internal successors, (212), 28 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:08:04,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 19.0) internal successors, (551), 29 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:08:04,525 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 19.0) internal successors, (551), 29 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:08:04,526 INFO L175 Difference]: Start difference. First operand has 345 places, 386 transitions, 6162 flow. Second operand 28 states and 212 transitions. [2023-11-29 06:08:04,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 448 transitions, 8007 flow [2023-11-29 06:08:04,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 448 transitions, 7541 flow, removed 181 selfloop flow, removed 22 redundant places. [2023-11-29 06:08:04,775 INFO L231 Difference]: Finished difference. Result has 357 places, 403 transitions, 6670 flow [2023-11-29 06:08:04,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5742, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6670, PETRI_PLACES=357, PETRI_TRANSITIONS=403} [2023-11-29 06:08:04,775 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 336 predicate places. [2023-11-29 06:08:04,775 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 403 transitions, 6670 flow [2023-11-29 06:08:04,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:08:04,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:08:04,776 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:08:04,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 06:08:04,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 06:08:04,976 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:08:04,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:08:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash 103788225, now seen corresponding path program 5 times [2023-11-29 06:08:04,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:08:04,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968536276] [2023-11-29 06:08:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:08:04,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:08:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:08:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:08:05,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:08:05,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968536276] [2023-11-29 06:08:05,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968536276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:08:05,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722581125] [2023-11-29 06:08:05,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:08:05,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:08:05,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:08:05,116 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:08:05,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 06:08:05,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:08:05,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:08:05,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:08:05,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:08:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:08:09,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:08:22,141 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (mod c_~x_1~0 4294967296))) (let ((.cse1 (+ .cse3 4294967296)) (.cse4 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse5 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse2 (+ .cse5 v_z_307)) (.cse0 (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)))) (or (< v_z_307 0) (< .cse0 0) (< 4294967295 v_z_307) (= .cse1 .cse2) (= .cse3 .cse2) (< .cse4 .cse0)))) (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse7 (+ .cse5 v_z_307)) (.cse6 (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)))) (or (< .cse6 0) (< 4294967295 v_z_307) (= .cse1 .cse7) (< .cse7 4294967296) (< .cse4 .cse6)))) (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse9 (+ .cse5 v_z_307)) (.cse8 (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)))) (or (< v_z_307 0) (< .cse8 0) (< 4294967295 .cse9) (= .cse3 .cse9) (< .cse4 .cse8))))))) is different from false [2023-11-29 06:08:30,235 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:08:42,477 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:08:46,797 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse0 (+ .cse2 v_z_307))) (or (< v_z_307 0) (not (= (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)) 0)) (< 4294967295 .cse0) (= .cse1 .cse0)))) (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse3 (+ .cse2 v_z_307))) (or (< v_z_307 0) (not (= (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)) 0)) (< 4294967295 v_z_307) (= (+ .cse1 4294967296) .cse3) (= .cse1 .cse3)))))) is different from false [2023-11-29 06:08:54,905 WARN L293 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:09:00,546 WARN L293 SmtUtils]: Spent 5.64s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:09:18,041 WARN L293 SmtUtils]: Spent 5.80s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:09:23,853 WARN L293 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:09:35,449 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse0 (+ .cse2 v_z_307))) (or (< v_z_307 0) (not (= (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)) 0)) (< 4294967295 .cse0) (= .cse1 .cse0)))) (forall ((v_y_307 Int) (v_z_307 Int)) (or (< v_z_307 0) (not (= (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)) 0)) (< 4294967295 v_z_307) (= .cse1 (+ .cse2 v_z_307)))))) is different from false [2023-11-29 06:09:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:09:39,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722581125] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:09:39,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:09:39,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 19 [2023-11-29 06:09:39,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372402227] [2023-11-29 06:09:39,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:09:39,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:09:39,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:09:39,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:09:39,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=208, Unknown=5, NotChecked=96, Total=380 [2023-11-29 06:09:39,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:09:39,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 403 transitions, 6670 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 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) [2023-11-29 06:09:39,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:09:39,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:09:39,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:09:43,813 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse0 (+ .cse2 v_z_307))) (or (< v_z_307 0) (not (= (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)) 0)) (< 4294967295 .cse0) (= .cse1 .cse0)))) (= c_~x_2~0 0) (forall ((v_y_307 Int) (v_z_307 Int)) (or (< v_z_307 0) (not (= (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)) 0)) (< 4294967295 v_z_307) (= .cse1 (+ .cse2 v_z_307)))) (= c_~x_1~0 0))) is different from false [2023-11-29 06:09:47,833 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse0 (+ .cse2 v_z_307))) (or (< v_z_307 0) (not (= (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)) 0)) (< 4294967295 .cse0) (= .cse1 .cse0)))) (= c_~x_2~0 0) (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse3 (+ .cse2 v_z_307))) (or (< v_z_307 0) (not (= (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)) 0)) (< 4294967295 v_z_307) (= (+ .cse1 4294967296) .cse3) (= .cse1 .cse3)))) (= c_~x_1~0 0))) is different from false [2023-11-29 06:09:51,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:09:55,923 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (mod c_~x_1~0 4294967296))) (let ((.cse1 (+ .cse3 4294967296)) (.cse4 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse5 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse2 (+ .cse5 v_z_307)) (.cse0 (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)))) (or (< v_z_307 0) (< .cse0 0) (< 4294967295 v_z_307) (= .cse1 .cse2) (= .cse3 .cse2) (< .cse4 .cse0)))) (= c_~x_2~0 0) (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse7 (+ .cse5 v_z_307)) (.cse6 (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)))) (or (< .cse6 0) (< 4294967295 v_z_307) (= .cse1 .cse7) (< .cse7 4294967296) (< .cse4 .cse6)))) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0) (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse9 (+ .cse5 v_z_307)) (.cse8 (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)))) (or (< v_z_307 0) (< .cse8 0) (< 4294967295 .cse9) (= .cse3 .cse9) (< .cse4 .cse8))))))) is different from false [2023-11-29 06:09:59,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:10:03,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:10:08,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:10:12,046 WARN L854 $PredicateComparison]: unable to prove that (and (or (< 4294967294 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)) (let ((.cse3 (mod c_~x_1~0 4294967296))) (let ((.cse1 (+ .cse3 4294967296)) (.cse4 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse5 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse2 (+ .cse5 v_z_307)) (.cse0 (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)))) (or (< v_z_307 0) (< .cse0 0) (< 4294967295 v_z_307) (= .cse1 .cse2) (= .cse3 .cse2) (< .cse4 .cse0)))) (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse7 (+ .cse5 v_z_307)) (.cse6 (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)))) (or (< .cse6 0) (< 4294967295 v_z_307) (= .cse1 .cse7) (< .cse7 4294967296) (< .cse4 .cse6)))) (forall ((v_y_307 Int) (v_z_307 Int)) (let ((.cse9 (+ .cse5 v_z_307)) (.cse8 (+ (* v_y_307 4294967296) (* 2863311531 v_z_307)))) (or (< v_z_307 0) (< .cse8 0) (< 4294967295 .cse9) (= .cse3 .cse9) (< .cse4 .cse8)))))))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0)) is different from false [2023-11-29 06:10:16,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:10:17,890 INFO L124 PetriNetUnfolderBase]: 913/1764 cut-off events. [2023-11-29 06:10:17,890 INFO L125 PetriNetUnfolderBase]: For 42510/42510 co-relation queries the response was YES. [2023-11-29 06:10:17,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15303 conditions, 1764 events. 913/1764 cut-off events. For 42510/42510 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 11154 event pairs, 183 based on Foata normal form. 3/1767 useless extension candidates. Maximal degree in co-relation 15081. Up to 1649 conditions per place. [2023-11-29 06:10:17,912 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 416 selfloop transitions, 27 changer transitions 23/467 dead transitions. [2023-11-29 06:10:17,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 467 transitions, 8469 flow [2023-11-29 06:10:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:10:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 06:10:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 134 transitions. [2023-11-29 06:10:17,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148606811145511 [2023-11-29 06:10:17,914 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 134 transitions. [2023-11-29 06:10:17,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 134 transitions. [2023-11-29 06:10:17,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:10:17,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 134 transitions. [2023-11-29 06:10:17,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.882352941176471) internal successors, (134), 17 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:10:17,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 19.0) internal successors, (342), 18 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:10:17,915 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 19.0) internal successors, (342), 18 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:10:17,915 INFO L175 Difference]: Start difference. First operand has 357 places, 403 transitions, 6670 flow. Second operand 17 states and 134 transitions. [2023-11-29 06:10:17,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 467 transitions, 8469 flow [2023-11-29 06:10:18,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 467 transitions, 7999 flow, removed 157 selfloop flow, removed 22 redundant places. [2023-11-29 06:10:18,247 INFO L231 Difference]: Finished difference. Result has 363 places, 427 transitions, 6797 flow [2023-11-29 06:10:18,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6239, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6797, PETRI_PLACES=363, PETRI_TRANSITIONS=427} [2023-11-29 06:10:18,248 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 342 predicate places. [2023-11-29 06:10:18,248 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 427 transitions, 6797 flow [2023-11-29 06:10:18,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 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) [2023-11-29 06:10:18,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:10:18,248 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:10:18,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 06:10:18,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:18,449 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:10:18,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:10:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash 469880661, now seen corresponding path program 6 times [2023-11-29 06:10:18,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:10:18,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790247159] [2023-11-29 06:10:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:10:18,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:10:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:10:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:10:18,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:10:18,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790247159] [2023-11-29 06:10:18,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790247159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:10:18,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013980134] [2023-11-29 06:10:18,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:10:18,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:10:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:10:18,735 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:10:18,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 06:10:18,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:10:18,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:10:18,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:10:18,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:10:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:10:21,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:10:37,794 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse6 (mod c_~x_1~0 4294967296))) (let ((.cse0 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse2 (+ .cse6 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse1 (+ (* 2863311531 v_z_312) (* v_y_312 4294967296))) (.cse3 (+ .cse4 v_z_312))) (or (< .cse0 .cse1) (< .cse1 0) (< 4294967295 v_z_312) (= .cse2 .cse3) (< .cse3 4294967296)))) (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse5 (+ (* 2863311531 v_z_312) (* v_y_312 4294967296))) (.cse7 (+ .cse4 v_z_312))) (or (< .cse0 .cse5) (= .cse6 .cse7) (< .cse5 0) (< 4294967295 .cse7) (< v_z_312 0)))) (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse8 (+ (* 2863311531 v_z_312) (* v_y_312 4294967296))) (.cse9 (+ .cse4 v_z_312))) (or (< .cse0 .cse8) (= .cse6 .cse9) (< .cse8 0) (< 4294967295 v_z_312) (= .cse2 .cse9) (< v_z_312 0))))))) is different from false [2023-11-29 06:10:50,323 WARN L293 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:11:13,524 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_312 Int) (v_y_312 Int)) (or (= .cse0 (+ .cse1 v_z_312)) (< 4294967295 v_z_312) (not (= (+ (* 2863311531 v_z_312) (* v_y_312 4294967296)) 0)) (< v_z_312 0))) (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse2 (+ .cse1 v_z_312))) (or (= .cse0 .cse2) (< 4294967295 .cse2) (not (= (+ (* 2863311531 v_z_312) (* v_y_312 4294967296)) 0)) (< v_z_312 0)))) (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse3 (+ .cse1 v_z_312))) (or (< 4294967295 v_z_312) (not (= (+ (* 2863311531 v_z_312) (* v_y_312 4294967296)) 0)) (= (+ .cse0 4294967296) .cse3) (< .cse3 4294967296)))))) is different from false [2023-11-29 06:11:22,799 WARN L293 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 9 DAG size of output: 1 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:11:38,928 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse0 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_312 Int) (v_y_312 Int)) (or (< 4294967295 v_z_312) (not (= (+ (* 2863311531 v_z_312) (* v_y_312 4294967296)) 0)) (< (+ .cse0 v_z_312) 4294967296))) (forall ((v_z_312 Int) (v_y_312 Int)) (or (= .cse1 (+ .cse0 v_z_312)) (< 4294967295 v_z_312) (not (= (+ (* 2863311531 v_z_312) (* v_y_312 4294967296)) 0)) (< v_z_312 0))) (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse2 (+ .cse0 v_z_312))) (or (= .cse1 .cse2) (< 4294967295 .cse2) (not (= (+ (* 2863311531 v_z_312) (* v_y_312 4294967296)) 0)) (< v_z_312 0)))))) is different from false [2023-11-29 06:11:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:11:38,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013980134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:11:38,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:11:38,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2023-11-29 06:11:38,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273598130] [2023-11-29 06:11:38,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:11:38,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:11:38,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:11:38,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:11:38,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=257, Unknown=6, NotChecked=108, Total=462 [2023-11-29 06:11:38,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:11:38,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 427 transitions, 6797 flow. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:11:38,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:11:38,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:11:38,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:11:42,962 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse0 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_312 Int) (v_y_312 Int)) (or (< 4294967295 v_z_312) (not (= (+ (* 2863311531 v_z_312) (* v_y_312 4294967296)) 0)) (< (+ .cse0 v_z_312) 4294967296))) (forall ((v_z_312 Int) (v_y_312 Int)) (or (= .cse1 (+ .cse0 v_z_312)) (< 4294967295 v_z_312) (not (= (+ (* 2863311531 v_z_312) (* v_y_312 4294967296)) 0)) (< v_z_312 0))) (= c_~x_2~0 0) (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse2 (+ .cse0 v_z_312))) (or (= .cse1 .cse2) (< 4294967295 .cse2) (not (= (+ (* 2863311531 v_z_312) (* v_y_312 4294967296)) 0)) (< v_z_312 0)))) (= c_~x_1~0 0))) is different from false [2023-11-29 06:11:46,993 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_312 Int) (v_y_312 Int)) (or (= .cse0 (+ .cse1 v_z_312)) (< 4294967295 v_z_312) (not (= (+ (* 2863311531 v_z_312) (* v_y_312 4294967296)) 0)) (< v_z_312 0))) (= c_~x_2~0 0) (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse2 (+ .cse1 v_z_312))) (or (= .cse0 .cse2) (< 4294967295 .cse2) (not (= (+ (* 2863311531 v_z_312) (* v_y_312 4294967296)) 0)) (< v_z_312 0)))) (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse3 (+ .cse1 v_z_312))) (or (< 4294967295 v_z_312) (not (= (+ (* 2863311531 v_z_312) (* v_y_312 4294967296)) 0)) (= (+ .cse0 4294967296) .cse3) (< .cse3 4294967296)))) (= c_~x_1~0 0))) is different from false [2023-11-29 06:11:51,056 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse6 (mod c_~x_1~0 4294967296))) (let ((.cse0 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse2 (+ .cse6 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse1 (+ (* 2863311531 v_z_312) (* v_y_312 4294967296))) (.cse3 (+ .cse4 v_z_312))) (or (< .cse0 .cse1) (< .cse1 0) (< 4294967295 v_z_312) (= .cse2 .cse3) (< .cse3 4294967296)))) (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse5 (+ (* 2863311531 v_z_312) (* v_y_312 4294967296))) (.cse7 (+ .cse4 v_z_312))) (or (< .cse0 .cse5) (= .cse6 .cse7) (< .cse5 0) (< 4294967295 .cse7) (< v_z_312 0)))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0) (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse8 (+ (* 2863311531 v_z_312) (* v_y_312 4294967296))) (.cse9 (+ .cse4 v_z_312))) (or (< .cse0 .cse8) (= .cse6 .cse9) (< .cse8 0) (< 4294967295 v_z_312) (= .cse2 .cse9) (< v_z_312 0))))))) is different from false [2023-11-29 06:11:55,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:11:59,367 WARN L854 $PredicateComparison]: unable to prove that (and (or (< 4294967294 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)) (let ((.cse6 (mod c_~x_1~0 4294967296))) (let ((.cse0 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse2 (+ .cse6 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse1 (+ (* 2863311531 v_z_312) (* v_y_312 4294967296))) (.cse3 (+ .cse4 v_z_312))) (or (< .cse0 .cse1) (< .cse1 0) (< 4294967295 v_z_312) (= .cse2 .cse3) (< .cse3 4294967296)))) (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse5 (+ (* 2863311531 v_z_312) (* v_y_312 4294967296))) (.cse7 (+ .cse4 v_z_312))) (or (< .cse0 .cse5) (= .cse6 .cse7) (< .cse5 0) (< 4294967295 .cse7) (< v_z_312 0)))) (forall ((v_z_312 Int) (v_y_312 Int)) (let ((.cse8 (+ (* 2863311531 v_z_312) (* v_y_312 4294967296))) (.cse9 (+ .cse4 v_z_312))) (or (< .cse0 .cse8) (= .cse6 .cse9) (< .cse8 0) (< 4294967295 v_z_312) (= .cse2 .cse9) (< v_z_312 0)))))))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0)) is different from false [2023-11-29 06:12:04,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:12:12,025 INFO L124 PetriNetUnfolderBase]: 958/1846 cut-off events. [2023-11-29 06:12:12,025 INFO L125 PetriNetUnfolderBase]: For 48596/48596 co-relation queries the response was YES. [2023-11-29 06:12:12,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16885 conditions, 1846 events. 958/1846 cut-off events. For 48596/48596 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 11723 event pairs, 354 based on Foata normal form. 2/1848 useless extension candidates. Maximal degree in co-relation 16688. Up to 1713 conditions per place. [2023-11-29 06:12:12,050 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 443 selfloop transitions, 27 changer transitions 4/475 dead transitions. [2023-11-29 06:12:12,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 475 transitions, 8763 flow [2023-11-29 06:12:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:12:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:12:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2023-11-29 06:12:12,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41353383458646614 [2023-11-29 06:12:12,052 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 110 transitions. [2023-11-29 06:12:12,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 110 transitions. [2023-11-29 06:12:12,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:12:12,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 110 transitions. [2023-11-29 06:12:12,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:12:12,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:12:12,053 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 19.0) internal successors, (285), 15 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:12:12,053 INFO L175 Difference]: Start difference. First operand has 363 places, 427 transitions, 6797 flow. Second operand 14 states and 110 transitions. [2023-11-29 06:12:12,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 475 transitions, 8763 flow [2023-11-29 06:12:12,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 475 transitions, 8689 flow, removed 35 selfloop flow, removed 5 redundant places. [2023-11-29 06:12:12,371 INFO L231 Difference]: Finished difference. Result has 374 places, 445 transitions, 7435 flow [2023-11-29 06:12:12,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6757, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7435, PETRI_PLACES=374, PETRI_TRANSITIONS=445} [2023-11-29 06:12:12,372 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 353 predicate places. [2023-11-29 06:12:12,372 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 445 transitions, 7435 flow [2023-11-29 06:12:12,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:12:12,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:12:12,372 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:12:12,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-29 06:12:12,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:12:12,573 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:12:12,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:12:12,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1692017198, now seen corresponding path program 22 times [2023-11-29 06:12:12,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:12:12,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185472907] [2023-11-29 06:12:12,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:12:12,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:12:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:12:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:12:13,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:12:13,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185472907] [2023-11-29 06:12:13,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185472907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:12:13,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753367493] [2023-11-29 06:12:13,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:12:13,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:12:13,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:12:13,399 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:12:13,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 06:12:13,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:12:13,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:12:13,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:12:13,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:12:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:12:13,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:13:12,192 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse0 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296)) (.cse3 (+ (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) 1))) (and (forall ((v_z_317 Int)) (or (< .cse0 v_z_317) (let ((.cse2 (* 2 v_z_317))) (< (+ c_~x_2~0 .cse1 .cse2) (+ c_~x_1~0 3 (* (div (+ c_~x_2~0 .cse2) 4294967296) 4294967296)))) (< v_z_317 .cse3))) (forall ((v_z_317 Int)) (let ((.cse4 (* 2 v_z_317))) (let ((.cse5 (* (div (+ c_~x_2~0 .cse4) 4294967296) 4294967296))) (or (< (+ c_~x_2~0 .cse1 .cse4 4294967293) (+ c_~x_1~0 .cse5)) (< .cse0 v_z_317) (< (+ c_~x_1~0 .cse5 1) (+ c_~x_2~0 .cse1 .cse4)) (< v_z_317 .cse3))))) (forall ((v_z_317 Int)) (or (let ((.cse6 (* 2 v_z_317))) (< (+ c_~x_1~0 (* (div (+ c_~x_2~0 .cse6) 4294967296) 4294967296)) (+ c_~x_2~0 4294967295 .cse1 .cse6))) (< .cse0 v_z_317) (< v_z_317 .cse3))))) is different from false [2023-11-29 06:13:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:12,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753367493] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:13:12,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:13:12,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2023-11-29 06:13:12,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439277164] [2023-11-29 06:13:12,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:13:12,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:13:12,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:13:12,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:13:12,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=264, Unknown=14, NotChecked=34, Total=380 [2023-11-29 06:13:12,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:13:12,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 445 transitions, 7435 flow. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:13:12,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:13:12,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:13:12,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:13:41,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:13:46,831 INFO L124 PetriNetUnfolderBase]: 983/1899 cut-off events. [2023-11-29 06:13:46,831 INFO L125 PetriNetUnfolderBase]: For 52770/52770 co-relation queries the response was YES. [2023-11-29 06:13:46,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17814 conditions, 1899 events. 983/1899 cut-off events. For 52770/52770 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 12207 event pairs, 120 based on Foata normal form. 2/1901 useless extension candidates. Maximal degree in co-relation 17567. Up to 1667 conditions per place. [2023-11-29 06:13:46,858 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 396 selfloop transitions, 86 changer transitions 9/492 dead transitions. [2023-11-29 06:13:46,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 492 transitions, 8912 flow [2023-11-29 06:13:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:13:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 06:13:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 156 transitions. [2023-11-29 06:13:46,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2023-11-29 06:13:46,859 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 156 transitions. [2023-11-29 06:13:46,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 156 transitions. [2023-11-29 06:13:46,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:13:46,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 156 transitions. [2023-11-29 06:13:46,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:13:46,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 19.0) internal successors, (399), 21 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:13:46,860 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 19.0) internal successors, (399), 21 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:13:46,860 INFO L175 Difference]: Start difference. First operand has 374 places, 445 transitions, 7435 flow. Second operand 20 states and 156 transitions. [2023-11-29 06:13:46,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 492 transitions, 8912 flow [2023-11-29 06:13:47,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 492 transitions, 8726 flow, removed 86 selfloop flow, removed 4 redundant places. [2023-11-29 06:13:47,223 INFO L231 Difference]: Finished difference. Result has 395 places, 453 transitions, 7689 flow [2023-11-29 06:13:47,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7249, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7689, PETRI_PLACES=395, PETRI_TRANSITIONS=453} [2023-11-29 06:13:47,224 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 374 predicate places. [2023-11-29 06:13:47,224 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 453 transitions, 7689 flow [2023-11-29 06:13:47,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:13:47,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:13:47,225 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:13:47,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 06:13:47,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:47,425 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:13:47,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:13:47,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1047138279, now seen corresponding path program 7 times [2023-11-29 06:13:47,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:13:47,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630778498] [2023-11-29 06:13:47,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:13:47,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:13:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:47,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:13:47,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630778498] [2023-11-29 06:13:47,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630778498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:13:47,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181364461] [2023-11-29 06:13:47,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:13:47,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:13:47,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:13:47,653 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:13:47,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 06:13:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:13:47,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:13:47,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:13:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:13:48,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:14:05,143 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_~x_1~0 4294967296))) (let ((.cse3 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse7 (+ .cse2 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_322 Int) (v_y_322 Int)) (let ((.cse1 (+ .cse4 v_z_322)) (.cse0 (+ (* v_y_322 4294967296) (* 2863311531 v_z_322)))) (or (< .cse0 0) (< 4294967295 .cse1) (= .cse2 .cse1) (< .cse3 .cse0) (< v_z_322 0)))) (forall ((v_z_322 Int) (v_y_322 Int)) (let ((.cse5 (+ (* v_y_322 4294967296) (* 2863311531 v_z_322))) (.cse6 (+ .cse4 v_z_322))) (or (< .cse5 0) (< 4294967295 v_z_322) (< .cse3 .cse5) (< .cse6 4294967296) (= .cse7 .cse6)))) (forall ((v_z_322 Int) (v_y_322 Int)) (let ((.cse8 (+ (* v_y_322 4294967296) (* 2863311531 v_z_322))) (.cse9 (+ .cse4 v_z_322))) (or (< .cse8 0) (< 4294967295 v_z_322) (= .cse2 .cse9) (< .cse3 .cse8) (< v_z_322 0) (= .cse7 .cse9))))))) is different from false [2023-11-29 06:14:16,559 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_322 Int) (v_y_322 Int)) (let ((.cse0 (+ .cse2 v_z_322))) (or (< 4294967295 .cse0) (= .cse1 .cse0) (not (= (+ (* v_y_322 4294967296) (* 2863311531 v_z_322)) 0)) (< v_z_322 0)))) (forall ((v_z_322 Int) (v_y_322 Int)) (or (< 4294967295 v_z_322) (= .cse1 (+ .cse2 v_z_322)) (not (= (+ (* v_y_322 4294967296) (* 2863311531 v_z_322)) 0)) (< v_z_322 0))))) is different from false [2023-11-29 06:14:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:14:37,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181364461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:14:37,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:14:37,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2023-11-29 06:14:37,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014200761] [2023-11-29 06:14:37,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:14:37,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:14:37,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:14:37,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:14:37,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=173, Unknown=5, NotChecked=58, Total=306 [2023-11-29 06:14:37,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:14:37,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 453 transitions, 7689 flow. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:14:37,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:14:37,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:14:37,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:14:41,222 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_~x_1~0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_322 Int) (v_y_322 Int)) (let ((.cse0 (+ .cse2 v_z_322))) (or (< 4294967295 .cse0) (= .cse1 .cse0) (not (= (+ (* v_y_322 4294967296) (* 2863311531 v_z_322)) 0)) (< v_z_322 0)))) (= c_~x_2~0 0) (forall ((v_z_322 Int) (v_y_322 Int)) (or (< 4294967295 v_z_322) (= .cse1 (+ .cse2 v_z_322)) (not (= (+ (* v_y_322 4294967296) (* 2863311531 v_z_322)) 0)) (< v_z_322 0))) (= c_~x_1~0 0))) is different from false [2023-11-29 06:14:45,274 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_~x_1~0 4294967296))) (let ((.cse3 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse7 (+ .cse2 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_322 Int) (v_y_322 Int)) (let ((.cse1 (+ .cse4 v_z_322)) (.cse0 (+ (* v_y_322 4294967296) (* 2863311531 v_z_322)))) (or (< .cse0 0) (< 4294967295 .cse1) (= .cse2 .cse1) (< .cse3 .cse0) (< v_z_322 0)))) (= c_~x_2~0 0) (forall ((v_z_322 Int) (v_y_322 Int)) (let ((.cse5 (+ (* v_y_322 4294967296) (* 2863311531 v_z_322))) (.cse6 (+ .cse4 v_z_322))) (or (< .cse5 0) (< 4294967295 v_z_322) (< .cse3 .cse5) (< .cse6 4294967296) (= .cse7 .cse6)))) (forall ((v_z_322 Int) (v_y_322 Int)) (let ((.cse8 (+ (* v_y_322 4294967296) (* 2863311531 v_z_322))) (.cse9 (+ .cse4 v_z_322))) (or (< .cse8 0) (< 4294967295 v_z_322) (= .cse2 .cse9) (< .cse3 .cse8) (< v_z_322 0) (= .cse7 .cse9)))) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0)))) is different from false [2023-11-29 06:14:49,382 WARN L854 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (or (< 4294967294 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)) (let ((.cse2 (mod c_~x_1~0 4294967296))) (let ((.cse3 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse7 (+ .cse2 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_322 Int) (v_y_322 Int)) (let ((.cse1 (+ .cse4 v_z_322)) (.cse0 (+ (* v_y_322 4294967296) (* 2863311531 v_z_322)))) (or (< .cse0 0) (< 4294967295 .cse1) (= .cse2 .cse1) (< .cse3 .cse0) (< v_z_322 0)))) (forall ((v_z_322 Int) (v_y_322 Int)) (let ((.cse5 (+ (* v_y_322 4294967296) (* 2863311531 v_z_322))) (.cse6 (+ .cse4 v_z_322))) (or (< .cse5 0) (< 4294967295 v_z_322) (< .cse3 .cse5) (< .cse6 4294967296) (= .cse7 .cse6)))) (forall ((v_z_322 Int) (v_y_322 Int)) (let ((.cse8 (+ (* v_y_322 4294967296) (* 2863311531 v_z_322))) (.cse9 (+ .cse4 v_z_322))) (or (< .cse8 0) (< 4294967295 v_z_322) (= .cse2 .cse9) (< .cse3 .cse8) (< v_z_322 0) (= .cse7 .cse9)))))))) (= c_~x_1~0 0)) is different from false [2023-11-29 06:14:53,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:15:15,981 WARN L293 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 33 DAG size of output: 32 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:15:25,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:15:26,189 INFO L124 PetriNetUnfolderBase]: 1015/1958 cut-off events. [2023-11-29 06:15:26,189 INFO L125 PetriNetUnfolderBase]: For 61674/61674 co-relation queries the response was YES. [2023-11-29 06:15:26,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19029 conditions, 1958 events. 1015/1958 cut-off events. For 61674/61674 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 12598 event pairs, 285 based on Foata normal form. 2/1960 useless extension candidates. Maximal degree in co-relation 18775. Up to 1823 conditions per place. [2023-11-29 06:15:26,217 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 458 selfloop transitions, 28 changer transitions 4/491 dead transitions. [2023-11-29 06:15:26,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 491 transitions, 9458 flow [2023-11-29 06:15:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:15:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:15:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 105 transitions. [2023-11-29 06:15:26,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2023-11-29 06:15:26,219 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 105 transitions. [2023-11-29 06:15:26,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 105 transitions. [2023-11-29 06:15:26,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:15:26,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 105 transitions. [2023-11-29 06:15:26,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:26,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 19.0) internal successors, (247), 13 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:26,220 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 19.0) internal successors, (247), 13 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:26,220 INFO L175 Difference]: Start difference. First operand has 395 places, 453 transitions, 7689 flow. Second operand 12 states and 105 transitions. [2023-11-29 06:15:26,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 491 transitions, 9458 flow [2023-11-29 06:15:26,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 491 transitions, 9280 flow, removed 46 selfloop flow, removed 15 redundant places. [2023-11-29 06:15:26,709 INFO L231 Difference]: Finished difference. Result has 394 places, 462 transitions, 7932 flow [2023-11-29 06:15:26,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7518, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7932, PETRI_PLACES=394, PETRI_TRANSITIONS=462} [2023-11-29 06:15:26,709 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 373 predicate places. [2023-11-29 06:15:26,710 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 462 transitions, 7932 flow [2023-11-29 06:15:26,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:15:26,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:15:26,710 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:15:26,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-29 06:15:26,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 06:15:26,910 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:15:26,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:15:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1946629193, now seen corresponding path program 8 times [2023-11-29 06:15:26,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:15:26,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138691209] [2023-11-29 06:15:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:15:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:15:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:15:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:27,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:15:27,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138691209] [2023-11-29 06:15:27,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138691209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:15:27,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159447760] [2023-11-29 06:15:27,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:15:27,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:15:27,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:15:27,094 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:15:27,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 06:15:27,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:15:27,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:15:27,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:15:27,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:15:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:15:37,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:15:53,041 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296))) (let ((.cse5 (+ .cse0 4294967296)) (.cse2 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse1 (+ .cse4 v_z_328)) (.cse3 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (= .cse0 .cse1) (< 4294967295 .cse1) (< .cse2 .cse3) (< .cse3 0) (< v_z_328 0)))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse6 (+ .cse4 v_z_328)) (.cse7 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (< 4294967295 v_z_328) (= .cse5 .cse6) (< .cse6 4294967296) (< .cse2 .cse7) (< .cse7 0)))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse8 (+ .cse4 v_z_328)) (.cse9 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (< 4294967295 v_z_328) (= .cse5 .cse8) (= .cse0 .cse8) (< .cse2 .cse9) (< .cse9 0) (< v_z_328 0))))))) is different from false [2023-11-29 06:16:09,617 WARN L293 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:16:29,986 WARN L293 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-29 06:16:34,063 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296))) (let ((.cse3 (+ .cse0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse1 (+ .cse2 v_z_328))) (or (= .cse0 .cse1) (< 4294967295 .cse1) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0)))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse4 (+ .cse2 v_z_328))) (or (< 4294967295 v_z_328) (= .cse3 .cse4) (= .cse0 .cse4) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0)))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse5 (+ .cse2 v_z_328))) (or (< 4294967295 v_z_328) (= .cse3 .cse5) (< .cse5 4294967296) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)))))))) is different from false [2023-11-29 06:16:51,133 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_328 Int) (v_z_328 Int)) (or (< 4294967295 v_z_328) (= .cse0 (+ .cse1 v_z_328)) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse2 (+ .cse1 v_z_328))) (or (= .cse0 .cse2) (< 4294967295 .cse2) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0)))))) is different from false [2023-11-29 06:17:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:17:07,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159447760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:17:07,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:17:07,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 10] total 22 [2023-11-29 06:17:07,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013311902] [2023-11-29 06:17:07,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:17:07,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:17:07,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:17:07,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:17:07,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=296, Unknown=6, NotChecked=114, Total=506 [2023-11-29 06:17:07,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:17:07,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 462 transitions, 7932 flow. Second operand has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 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) [2023-11-29 06:17:07,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:17:07,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:17:07,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:17:11,534 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_328 Int) (v_z_328 Int)) (or (< 4294967295 v_z_328) (= .cse0 (+ .cse1 v_z_328)) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse2 (+ .cse1 v_z_328))) (or (= .cse0 .cse2) (< 4294967295 .cse2) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0)))) (= c_~x_2~0 0) (= c_~x_1~0 0))) is different from false [2023-11-29 06:17:15,644 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296))) (let ((.cse3 (+ .cse0 4294967296)) (.cse2 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse1 (+ .cse2 v_z_328))) (or (= .cse0 .cse1) (< 4294967295 .cse1) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0)))) (= c_~x_2~0 0) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse4 (+ .cse2 v_z_328))) (or (< 4294967295 v_z_328) (= .cse3 .cse4) (= .cse0 .cse4) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)) (< v_z_328 0)))) (= c_~x_1~0 0) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse5 (+ .cse2 v_z_328))) (or (< 4294967295 v_z_328) (= .cse3 .cse5) (< .cse5 4294967296) (not (= (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)) 0)))))))) is different from false [2023-11-29 06:17:19,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:17:23,728 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296))) (let ((.cse5 (+ .cse0 4294967296)) (.cse2 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse1 (+ .cse4 v_z_328)) (.cse3 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (= .cse0 .cse1) (< 4294967295 .cse1) (< .cse2 .cse3) (< .cse3 0) (< v_z_328 0)))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse6 (+ .cse4 v_z_328)) (.cse7 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (< 4294967295 v_z_328) (= .cse5 .cse6) (< .cse6 4294967296) (< .cse2 .cse7) (< .cse7 0)))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse8 (+ .cse4 v_z_328)) (.cse9 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (< 4294967295 v_z_328) (= .cse5 .cse8) (= .cse0 .cse8) (< .cse2 .cse9) (< .cse9 0) (< v_z_328 0)))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0)))) is different from false [2023-11-29 06:17:27,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:17:30,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:17:34,156 WARN L854 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (or (let ((.cse0 (mod c_~x_1~0 4294967296))) (let ((.cse5 (+ .cse0 4294967296)) (.cse2 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse1 (+ .cse4 v_z_328)) (.cse3 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (= .cse0 .cse1) (< 4294967295 .cse1) (< .cse2 .cse3) (< .cse3 0) (< v_z_328 0)))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse6 (+ .cse4 v_z_328)) (.cse7 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (< 4294967295 v_z_328) (= .cse5 .cse6) (< .cse6 4294967296) (< .cse2 .cse7) (< .cse7 0)))) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse8 (+ .cse4 v_z_328)) (.cse9 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (< 4294967295 v_z_328) (= .cse5 .cse8) (= .cse0 .cse8) (< .cse2 .cse9) (< .cse9 0) (< v_z_328 0))))))) (< (mod (+ c_thread2Thread1of1ForFork1_~i~1 3) 4294967296) (+ (mod c_thread2Thread1of1ForFork1_~i~1 4294967296) 1))) (= c_~x_1~0 0)) is different from false [2023-11-29 06:17:38,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:17:42,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:17:46,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:17:57,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-29 06:18:00,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:18:01,719 INFO L124 PetriNetUnfolderBase]: 1071/2076 cut-off events. [2023-11-29 06:18:01,719 INFO L125 PetriNetUnfolderBase]: For 70728/70728 co-relation queries the response was YES. [2023-11-29 06:18:01,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20808 conditions, 2076 events. 1071/2076 cut-off events. For 70728/70728 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 13604 event pairs, 275 based on Foata normal form. 3/2079 useless extension candidates. Maximal degree in co-relation 20551. Up to 1854 conditions per place. [2023-11-29 06:18:01,763 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 460 selfloop transitions, 74 changer transitions 12/547 dead transitions. [2023-11-29 06:18:01,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 547 transitions, 10486 flow [2023-11-29 06:18:01,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 06:18:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 06:18:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 176 transitions. [2023-11-29 06:18:01,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40274599542334094 [2023-11-29 06:18:01,765 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 176 transitions. [2023-11-29 06:18:01,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 176 transitions. [2023-11-29 06:18:01,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:18:01,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 176 transitions. [2023-11-29 06:18:01,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.6521739130434785) internal successors, (176), 23 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:01,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 19.0) internal successors, (456), 24 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:01,767 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 19.0) internal successors, (456), 24 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:01,767 INFO L175 Difference]: Start difference. First operand has 394 places, 462 transitions, 7932 flow. Second operand 23 states and 176 transitions. [2023-11-29 06:18:01,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 547 transitions, 10486 flow [2023-11-29 06:18:02,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 547 transitions, 10211 flow, removed 108 selfloop flow, removed 8 redundant places. [2023-11-29 06:18:02,222 INFO L231 Difference]: Finished difference. Result has 422 places, 500 transitions, 8957 flow [2023-11-29 06:18:02,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7687, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8957, PETRI_PLACES=422, PETRI_TRANSITIONS=500} [2023-11-29 06:18:02,223 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 401 predicate places. [2023-11-29 06:18:02,223 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 500 transitions, 8957 flow [2023-11-29 06:18:02,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 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) [2023-11-29 06:18:02,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:18:02,223 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:18:02,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 06:18:02,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 06:18:02,425 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:18:02,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:18:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1939248153, now seen corresponding path program 9 times [2023-11-29 06:18:02,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:18:02,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285580220] [2023-11-29 06:18:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:18:02,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:18:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:18:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:18:02,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:18:02,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285580220] [2023-11-29 06:18:02,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285580220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:18:02,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881507552] [2023-11-29 06:18:02,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:18:02,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:18:02,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:18:02,712 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:18:02,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 06:18:02,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:18:02,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:18:02,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:18:02,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:18:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:18:05,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:18:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:18:11,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881507552] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:18:11,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:18:11,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 20 [2023-11-29 06:18:11,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644424595] [2023-11-29 06:18:11,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:18:11,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:18:11,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:18:11,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:18:11,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=314, Unknown=1, NotChecked=0, Total=420 [2023-11-29 06:18:11,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:18:11,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 500 transitions, 8957 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) [2023-11-29 06:18:11,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:18:11,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:18:11,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:18:31,520 WARN L293 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 33 DAG size of output: 32 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:18:32,470 INFO L124 PetriNetUnfolderBase]: 1096/2122 cut-off events. [2023-11-29 06:18:32,470 INFO L125 PetriNetUnfolderBase]: For 83256/83256 co-relation queries the response was YES. [2023-11-29 06:18:32,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22084 conditions, 2122 events. 1096/2122 cut-off events. For 83256/83256 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 13950 event pairs, 171 based on Foata normal form. 2/2124 useless extension candidates. Maximal degree in co-relation 21783. Up to 1501 conditions per place. [2023-11-29 06:18:32,502 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 405 selfloop transitions, 130 changer transitions 4/540 dead transitions. [2023-11-29 06:18:32,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 540 transitions, 10862 flow [2023-11-29 06:18:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:18:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 06:18:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 137 transitions. [2023-11-29 06:18:32,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241486068111455 [2023-11-29 06:18:32,503 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 137 transitions. [2023-11-29 06:18:32,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 137 transitions. [2023-11-29 06:18:32,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:18:32,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 137 transitions. [2023-11-29 06:18:32,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.058823529411764) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:32,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 19.0) internal successors, (342), 18 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:32,504 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 19.0) internal successors, (342), 18 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:32,504 INFO L175 Difference]: Start difference. First operand has 422 places, 500 transitions, 8957 flow. Second operand 17 states and 137 transitions. [2023-11-29 06:18:32,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 540 transitions, 10862 flow [2023-11-29 06:18:33,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 540 transitions, 10678 flow, removed 81 selfloop flow, removed 4 redundant places. [2023-11-29 06:18:33,095 INFO L231 Difference]: Finished difference. Result has 436 places, 507 transitions, 9390 flow [2023-11-29 06:18:33,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8777, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9390, PETRI_PLACES=436, PETRI_TRANSITIONS=507} [2023-11-29 06:18:33,097 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 415 predicate places. [2023-11-29 06:18:33,097 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 507 transitions, 9390 flow [2023-11-29 06:18:33,097 INFO L496 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) [2023-11-29 06:18:33,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:18:33,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:18:33,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 06:18:33,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 06:18:33,298 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:18:33,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:18:33,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1471923906, now seen corresponding path program 23 times [2023-11-29 06:18:33,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:18:33,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716692565] [2023-11-29 06:18:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:18:33,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:18:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:18:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:18:33,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:18:33,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716692565] [2023-11-29 06:18:33,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716692565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:18:33,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734817661] [2023-11-29 06:18:33,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:18:33,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:18:33,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:18:33,970 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:18:33,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 06:18:34,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:18:34,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:18:34,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:18:34,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:18:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:18:34,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:18:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:18:35,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734817661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:18:35,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:18:35,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2023-11-29 06:18:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813540498] [2023-11-29 06:18:35,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:18:35,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:18:35,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:18:35,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:18:35,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:18:35,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:18:35,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 507 transitions, 9390 flow. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:35,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:18:35,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:18:35,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:18:44,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 06:18:46,806 INFO L124 PetriNetUnfolderBase]: 1206/2335 cut-off events. [2023-11-29 06:18:46,806 INFO L125 PetriNetUnfolderBase]: For 114172/114172 co-relation queries the response was YES. [2023-11-29 06:18:46,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25813 conditions, 2335 events. 1206/2335 cut-off events. For 114172/114172 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 15707 event pairs, 114 based on Foata normal form. 3/2338 useless extension candidates. Maximal degree in co-relation 25537. Up to 1604 conditions per place. [2023-11-29 06:18:46,842 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 428 selfloop transitions, 179 changer transitions 20/628 dead transitions. [2023-11-29 06:18:46,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 628 transitions, 13549 flow [2023-11-29 06:18:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 06:18:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 06:18:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 236 transitions. [2023-11-29 06:18:46,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283121597096189 [2023-11-29 06:18:46,843 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 236 transitions. [2023-11-29 06:18:46,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 236 transitions. [2023-11-29 06:18:46,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:18:46,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 236 transitions. [2023-11-29 06:18:46,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 8.137931034482758) internal successors, (236), 29 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:46,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 19.0) internal successors, (570), 30 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:46,845 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 19.0) internal successors, (570), 30 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:46,845 INFO L175 Difference]: Start difference. First operand has 436 places, 507 transitions, 9390 flow. Second operand 29 states and 236 transitions. [2023-11-29 06:18:46,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 628 transitions, 13549 flow [2023-11-29 06:18:47,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 628 transitions, 13064 flow, removed 177 selfloop flow, removed 15 redundant places. [2023-11-29 06:18:47,497 INFO L231 Difference]: Finished difference. Result has 460 places, 556 transitions, 11504 flow [2023-11-29 06:18:47,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=9085, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=11504, PETRI_PLACES=460, PETRI_TRANSITIONS=556} [2023-11-29 06:18:47,498 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 439 predicate places. [2023-11-29 06:18:47,498 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 556 transitions, 11504 flow [2023-11-29 06:18:47,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:47,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:18:47,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:18:47,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 06:18:47,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 06:18:47,699 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:18:47,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:18:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash -366012776, now seen corresponding path program 24 times [2023-11-29 06:18:47,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:18:47,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115251521] [2023-11-29 06:18:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:18:47,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:18:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:18:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:18:48,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:18:48,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115251521] [2023-11-29 06:18:48,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115251521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:18:48,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36596332] [2023-11-29 06:18:48,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:18:48,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:18:48,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:18:48,520 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:18:48,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 06:18:48,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:18:48,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:18:48,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:18:48,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:18:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:18:49,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:18:54,175 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse5 (mod c_~x_1~0 4294967296)) (.cse6 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296)) (.cse3 (mod (+ 2 c_thread2Thread1of1ForFork1_~i~1) 4294967296)) (.cse4 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse0 (+ (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) 1)) (.cse1 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296))) (and (or (forall ((v_z_344 Int)) (or (< v_z_344 .cse0) (< .cse1 v_z_344) (let ((.cse2 (* 2 v_z_344))) (< (+ (* (div (+ c_~x_2~0 .cse2) 4294967296) 4294967296) c_~x_1~0 .cse3) (+ c_~x_2~0 .cse2 .cse4 1))))) (< 4294967294 (+ .cse5 .cse6))) (or (< (+ .cse5 .cse3) 4294967296) (forall ((v_z_344 Int)) (or (< v_z_344 .cse0) (< .cse1 v_z_344) (let ((.cse7 (* 2 v_z_344))) (< (+ c_~x_2~0 .cse7 4294967294 .cse4) (+ (* (div (+ c_~x_2~0 .cse7) 4294967296) 4294967296) .cse6 c_~x_1~0)))))) (forall ((v_z_344 Int)) (or (< v_z_344 .cse0) (< .cse1 v_z_344) (let ((.cse8 (* 2 v_z_344))) (< (+ c_~x_2~0 .cse8 .cse4) (+ (* (div (+ c_~x_2~0 .cse8) 4294967296) 4294967296) .cse6 c_~x_1~0 2))))) (forall ((v_z_344 Int)) (or (let ((.cse9 (* 2 v_z_344))) (< (+ (* (div (+ c_~x_2~0 .cse9) 4294967296) 4294967296) c_~x_1~0 .cse3) (+ c_~x_2~0 .cse9 4294967297 .cse4))) (< v_z_344 .cse0) (< .cse1 v_z_344))))) is different from false [2023-11-29 06:18:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-29 06:18:54,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36596332] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:18:54,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:18:54,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2023-11-29 06:18:54,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766067936] [2023-11-29 06:18:54,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:18:54,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:18:54,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:18:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:18:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=276, Unknown=1, NotChecked=34, Total=380 [2023-11-29 06:18:54,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:18:54,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 556 transitions, 11504 flow. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:54,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:18:54,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:18:54,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:18:57,983 INFO L124 PetriNetUnfolderBase]: 1198/2324 cut-off events. [2023-11-29 06:18:57,984 INFO L125 PetriNetUnfolderBase]: For 113246/113246 co-relation queries the response was YES. [2023-11-29 06:18:58,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26146 conditions, 2324 events. 1198/2324 cut-off events. For 113246/113246 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 15577 event pairs, 289 based on Foata normal form. 2/2326 useless extension candidates. Maximal degree in co-relation 25837. Up to 2124 conditions per place. [2023-11-29 06:18:58,021 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 499 selfloop transitions, 91 changer transitions 9/600 dead transitions. [2023-11-29 06:18:58,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 600 transitions, 13224 flow [2023-11-29 06:18:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:18:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 06:18:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 162 transitions. [2023-11-29 06:18:58,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263157894736842 [2023-11-29 06:18:58,023 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 162 transitions. [2023-11-29 06:18:58,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 162 transitions. [2023-11-29 06:18:58,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:18:58,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 162 transitions. [2023-11-29 06:18:58,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.1) internal successors, (162), 20 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:58,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 19.0) internal successors, (399), 21 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:58,025 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 19.0) internal successors, (399), 21 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:58,025 INFO L175 Difference]: Start difference. First operand has 460 places, 556 transitions, 11504 flow. Second operand 20 states and 162 transitions. [2023-11-29 06:18:58,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 600 transitions, 13224 flow [2023-11-29 06:18:59,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 600 transitions, 11818 flow, removed 630 selfloop flow, removed 17 redundant places. [2023-11-29 06:18:59,042 INFO L231 Difference]: Finished difference. Result has 466 places, 561 transitions, 10516 flow [2023-11-29 06:18:59,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10114, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10516, PETRI_PLACES=466, PETRI_TRANSITIONS=561} [2023-11-29 06:18:59,043 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 445 predicate places. [2023-11-29 06:18:59,043 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 561 transitions, 10516 flow [2023-11-29 06:18:59,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:18:59,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:18:59,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:18:59,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 06:18:59,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:18:59,244 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:18:59,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:18:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1312609343, now seen corresponding path program 25 times [2023-11-29 06:18:59,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:18:59,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50433158] [2023-11-29 06:18:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:18:59,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:18:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:19:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:19:00,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:19:00,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50433158] [2023-11-29 06:19:00,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50433158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:19:00,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636934805] [2023-11-29 06:19:00,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:19:00,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:19:00,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:19:00,050 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:19:00,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 06:19:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:19:00,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:19:00,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:19:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:19:00,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:19:08,544 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296)) (.cse7 (mod (+ 2 c_thread1Thread1of1ForFork0_~i~0) 4294967296)) (.cse2 (* (div c_~x_2~0 4294967296) 4294967296)) (.cse0 (+ (mod c_thread2Thread1of1ForFork1_~i~1 4294967296) 1)) (.cse1 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296))) (and (forall ((v_z_352 Int)) (or (< v_z_352 .cse0) (< .cse1 v_z_352) (let ((.cse3 (* 2 v_z_352))) (< (+ c_~x_1~0 .cse2 .cse3) (+ c_~x_2~0 (* (div (+ c_~x_1~0 .cse3) 4294967296) 4294967296) 2 .cse4))))) (forall ((v_z_354 Int)) (let ((.cse5 (* 2 v_z_354))) (let ((.cse6 (* (div (+ c_~x_1~0 .cse5) 4294967296) 4294967296))) (or (< .cse1 v_z_354) (< v_z_354 .cse0) (< (+ c_~x_1~0 4294967294 .cse5 .cse2) (+ c_~x_2~0 .cse4 .cse6)) (< (+ c_~x_2~0 .cse7 .cse6) (+ c_~x_1~0 .cse5 .cse2 1)))))) (forall ((v_z_356 Int)) (or (let ((.cse8 (* 2 v_z_356))) (< (+ c_~x_2~0 .cse7 (* (div (+ c_~x_1~0 .cse8) 4294967296) 4294967296)) (+ c_~x_1~0 4294967297 .cse2 .cse8))) (< v_z_356 .cse0) (< .cse1 v_z_356))))) is different from false [2023-11-29 06:19:12,695 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (mod c_thread2Thread1of1ForFork1_~i~1 4294967296) 1)) (.cse4 (* (div c_~x_2~0 4294967296) 4294967296)) (.cse0 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296))) (and (forall ((v_z_354 Int)) (let ((.cse3 (* 2 v_z_354))) (let ((.cse2 (* (div (+ c_~x_1~0 .cse3) 4294967296) 4294967296))) (or (< .cse0 v_z_354) (< v_z_354 .cse1) (< (+ c_~x_2~0 .cse2 1) (+ c_~x_1~0 .cse3 .cse4)) (< (+ c_~x_1~0 .cse3 .cse4 4294967293) (+ c_~x_2~0 .cse2)))))) (forall ((v_z_352 Int)) (or (< v_z_352 .cse1) (< .cse0 v_z_352) (let ((.cse5 (* 2 v_z_352))) (< (+ c_~x_1~0 .cse4 .cse5) (+ c_~x_2~0 (* (div (+ c_~x_1~0 .cse5) 4294967296) 4294967296) 3))))) (forall ((v_z_356 Int)) (or (< v_z_356 .cse1) (let ((.cse6 (* 2 v_z_356))) (< (+ c_~x_2~0 (* (div (+ c_~x_1~0 .cse6) 4294967296) 4294967296)) (+ c_~x_1~0 4294967295 .cse4 .cse6))) (< .cse0 v_z_356))))) is different from false [2023-11-29 06:19:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-29 06:19:12,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636934805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:19:12,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:19:12,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2023-11-29 06:19:12,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26997844] [2023-11-29 06:19:12,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:19:12,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:19:12,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:19:12,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:19:12,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=245, Unknown=2, NotChecked=66, Total=380 [2023-11-29 06:19:12,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 19 [2023-11-29 06:19:12,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 561 transitions, 10516 flow. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:12,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:19:12,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 19 [2023-11-29 06:19:12,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:19:15,832 INFO L124 PetriNetUnfolderBase]: 1205/2341 cut-off events. [2023-11-29 06:19:15,832 INFO L125 PetriNetUnfolderBase]: For 68240/68240 co-relation queries the response was YES. [2023-11-29 06:19:15,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23678 conditions, 2341 events. 1205/2341 cut-off events. For 68240/68240 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 15738 event pairs, 301 based on Foata normal form. 2/2343 useless extension candidates. Maximal degree in co-relation 23363. Up to 2189 conditions per place. [2023-11-29 06:19:15,870 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 500 selfloop transitions, 88 changer transitions 7/596 dead transitions. [2023-11-29 06:19:15,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 596 transitions, 12212 flow [2023-11-29 06:19:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:19:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 06:19:15,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 146 transitions. [2023-11-29 06:19:15,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38421052631578945 [2023-11-29 06:19:15,872 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 146 transitions. [2023-11-29 06:19:15,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 146 transitions. [2023-11-29 06:19:15,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:19:15,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 146 transitions. [2023-11-29 06:19:15,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.3) internal successors, (146), 20 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:15,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 19.0) internal successors, (399), 21 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:15,873 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 19.0) internal successors, (399), 21 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:15,873 INFO L175 Difference]: Start difference. First operand has 466 places, 561 transitions, 10516 flow. Second operand 20 states and 146 transitions. [2023-11-29 06:19:15,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 596 transitions, 12212 flow [2023-11-29 06:19:16,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 596 transitions, 11959 flow, removed 73 selfloop flow, removed 15 redundant places. [2023-11-29 06:19:16,545 INFO L231 Difference]: Finished difference. Result has 475 places, 569 transitions, 10709 flow [2023-11-29 06:19:16,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=10263, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10709, PETRI_PLACES=475, PETRI_TRANSITIONS=569} [2023-11-29 06:19:16,546 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 454 predicate places. [2023-11-29 06:19:16,546 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 569 transitions, 10709 flow [2023-11-29 06:19:16,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:19:16,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:19:16,546 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:19:16,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-29 06:19:16,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:19:16,746 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:19:16,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:19:16,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1586923163, now seen corresponding path program 10 times [2023-11-29 06:19:16,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:19:16,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727090988] [2023-11-29 06:19:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:19:16,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:19:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:19:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:19:16,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:19:16,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727090988] [2023-11-29 06:19:16,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727090988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:19:16,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395719351] [2023-11-29 06:19:16,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:19:16,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:19:16,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:19:16,917 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:19:16,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4aa6624-0243-48eb-afa9-70ed2ae6a0d1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 06:19:17,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:19:17,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:19:17,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:19:17,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:19:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:19:19,105 INFO L327 TraceCheckSpWp]: Computing backward predicates...