./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-queue.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_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/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_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/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_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/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 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:48:26,928 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:48:27,017 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:48:27,022 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:48:27,023 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:48:27,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:48:27,048 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:48:27,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:48:27,049 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:48:27,050 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:48:27,050 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:48:27,051 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:48:27,051 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:48:27,052 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:48:27,052 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:48:27,053 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:48:27,053 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:48:27,054 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:48:27,054 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:48:27,055 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:48:27,055 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:48:27,056 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:48:27,056 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:48:27,057 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:48:27,057 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:48:27,057 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:48:27,058 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:48:27,058 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:48:27,059 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:48:27,059 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:48:27,059 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:48:27,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:48:27,060 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:48:27,061 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:48:27,061 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:48:27,062 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:48:27,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:48:27,062 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:48:27,063 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:48:27,063 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:48:27,063 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:48:27,064 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:48:27,064 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_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 [2023-11-29 06:48:27,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:48:27,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:48:27,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:48:27,327 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:48:27,327 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:48:27,329 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2023-11-29 06:48:30,101 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:48:30,283 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:48:30,284 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2023-11-29 06:48:30,292 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/data/c6b03a480/e8527a3b47f241e9938f28ecbe32403b/FLAGac246b857 [2023-11-29 06:48:30,307 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/data/c6b03a480/e8527a3b47f241e9938f28ecbe32403b [2023-11-29 06:48:30,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:48:30,311 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:48:30,312 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:48:30,313 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:48:30,318 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:48:30,319 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,320 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@738b50ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30, skipping insertion in model container [2023-11-29 06:48:30,320 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,345 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:48:30,533 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_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2464,2477] [2023-11-29 06:48:30,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:48:30,578 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:48:30,623 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_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2464,2477] [2023-11-29 06:48:30,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:48:30,634 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:48:30,634 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:48:30,642 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:48:30,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30 WrapperNode [2023-11-29 06:48:30,643 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:48:30,644 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:48:30,644 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:48:30,644 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:48:30,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,658 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,679 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 135 [2023-11-29 06:48:30,679 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:48:30,680 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:48:30,680 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:48:30,680 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:48:30,692 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,696 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,711 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 3, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 06:48:30,712 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,712 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,719 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,723 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,725 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,726 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,729 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:48:30,729 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:48:30,730 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:48:30,730 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:48:30,731 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (1/1) ... [2023-11-29 06:48:30,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:48:30,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:30,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:48:30,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:48:30,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:48:30,799 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:48:30,799 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:48:30,799 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:48:30,799 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:48:30,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:48:30,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:48:30,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:48:30,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:48:30,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:48:30,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:48:30,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:48:30,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:48:30,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:48:30,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:48:30,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:48:30,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:48:30,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:48:30,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:48:30,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:48:30,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:48:30,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:48:30,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:48:30,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:48:30,803 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 06:48:30,918 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:48:30,920 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:48:31,133 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:48:31,341 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:48:31,341 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:48:31,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:48:31 BoogieIcfgContainer [2023-11-29 06:48:31,342 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:48:31,345 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:48:31,345 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:48:31,349 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:48:31,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:48:30" (1/3) ... [2023-11-29 06:48:31,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b1d1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:48:31, skipping insertion in model container [2023-11-29 06:48:31,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:48:30" (2/3) ... [2023-11-29 06:48:31,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b1d1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:48:31, skipping insertion in model container [2023-11-29 06:48:31,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:48:31" (3/3) ... [2023-11-29 06:48:31,352 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-11-29 06:48:31,361 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:48:31,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:48:31,373 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:48:31,373 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:48:31,415 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 06:48:31,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2023-11-29 06:48:31,479 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2023-11-29 06:48:31,480 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:48:31,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 5/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2023-11-29 06:48:31,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2023-11-29 06:48:31,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 26 transitions, 64 flow [2023-11-29 06:48:31,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:48:31,504 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;@6d397e6b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:48:31,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 06:48:31,516 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:48:31,517 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2023-11-29 06:48:31,517 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:48:31,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:31,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:31,518 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 06:48:31,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:31,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1575601250, now seen corresponding path program 1 times [2023-11-29 06:48:31,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:31,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125847588] [2023-11-29 06:48:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:31,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:31,781 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 06:48:31,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:31,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125847588] [2023-11-29 06:48:31,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125847588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:31,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:31,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:48:31,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877889021] [2023-11-29 06:48:31,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:31,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:48:31,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:31,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:48:31,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:48:31,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:31,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:31,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:31,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:31,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:31,909 INFO L124 PetriNetUnfolderBase]: 109/202 cut-off events. [2023-11-29 06:48:31,910 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 06:48:31,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 202 events. 109/202 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 770 event pairs, 64 based on Foata normal form. 40/190 useless extension candidates. Maximal degree in co-relation 334. Up to 180 conditions per place. [2023-11-29 06:48:31,914 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 19 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2023-11-29 06:48:31,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 98 flow [2023-11-29 06:48:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:48:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-29 06:48:31,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2023-11-29 06:48:31,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2023-11-29 06:48:31,927 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 35 transitions. [2023-11-29 06:48:31,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 35 transitions. [2023-11-29 06:48:31,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:31,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 35 transitions. [2023-11-29 06:48:31,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:31,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:31,936 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:31,938 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 64 flow. Second operand 2 states and 35 transitions. [2023-11-29 06:48:31,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 98 flow [2023-11-29 06:48:31,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:48:31,943 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 52 flow [2023-11-29 06:48:31,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-11-29 06:48:31,949 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2023-11-29 06:48:31,949 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 52 flow [2023-11-29 06:48:31,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:31,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:31,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:31,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:48:31,950 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 06:48:31,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:31,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1742595539, now seen corresponding path program 1 times [2023-11-29 06:48:31,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:31,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652573332] [2023-11-29 06:48:31,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:31,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:32,081 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 06:48:32,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:32,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652573332] [2023-11-29 06:48:32,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652573332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:32,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:32,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:48:32,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554947832] [2023-11-29 06:48:32,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:32,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:48:32,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:32,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:48:32,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:48:32,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:32,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:32,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:32,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:32,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:32,183 INFO L124 PetriNetUnfolderBase]: 164/302 cut-off events. [2023-11-29 06:48:32,183 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-29 06:48:32,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 302 events. 164/302 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1224 event pairs, 56 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 582. Up to 139 conditions per place. [2023-11-29 06:48:32,187 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 26 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2023-11-29 06:48:32,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 36 transitions, 140 flow [2023-11-29 06:48:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:48:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:48:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2023-11-29 06:48:32,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2023-11-29 06:48:32,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 53 transitions. [2023-11-29 06:48:32,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 53 transitions. [2023-11-29 06:48:32,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:32,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 53 transitions. [2023-11-29 06:48:32,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:32,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:32,192 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:32,192 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 3 states and 53 transitions. [2023-11-29 06:48:32,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 36 transitions, 140 flow [2023-11-29 06:48:32,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 36 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:48:32,194 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 64 flow [2023-11-29 06:48:32,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-29 06:48:32,195 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-11-29 06:48:32,195 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 64 flow [2023-11-29 06:48:32,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:32,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:32,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:32,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:48:32,196 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 06:48:32,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:32,197 INFO L85 PathProgramCache]: Analyzing trace with hash -358079149, now seen corresponding path program 1 times [2023-11-29 06:48:32,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:32,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123953372] [2023-11-29 06:48:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:32,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:32,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:32,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123953372] [2023-11-29 06:48:32,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123953372] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:32,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:32,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:48:32,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830422788] [2023-11-29 06:48:32,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:32,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:48:32,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:48:32,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:48:32,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:32,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 64 flow. Second operand has 3 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 06:48:32,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:32,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:32,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:32,418 INFO L124 PetriNetUnfolderBase]: 176/345 cut-off events. [2023-11-29 06:48:32,418 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-29 06:48:32,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 345 events. 176/345 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1577 event pairs, 77 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 704. Up to 222 conditions per place. [2023-11-29 06:48:32,422 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 24 selfloop transitions, 2 changer transitions 7/38 dead transitions. [2023-11-29 06:48:32,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 159 flow [2023-11-29 06:48:32,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:48:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:48:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2023-11-29 06:48:32,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2023-11-29 06:48:32,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 54 transitions. [2023-11-29 06:48:32,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 54 transitions. [2023-11-29 06:48:32,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:32,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 54 transitions. [2023-11-29 06:48:32,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:32,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:32,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:32,427 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 64 flow. Second operand 3 states and 54 transitions. [2023-11-29 06:48:32,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 159 flow [2023-11-29 06:48:32,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:48:32,429 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 74 flow [2023-11-29 06:48:32,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-11-29 06:48:32,430 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-11-29 06:48:32,431 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 74 flow [2023-11-29 06:48:32,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 06:48:32,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:32,431 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:32,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:48:32,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:48:32,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1064370560, now seen corresponding path program 1 times [2023-11-29 06:48:32,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:32,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983831742] [2023-11-29 06:48:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:32,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:32,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:32,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983831742] [2023-11-29 06:48:32,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983831742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:48:32,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:48:32,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:48:32,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725399264] [2023-11-29 06:48:32,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:48:32,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:48:32,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:32,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:48:32,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:48:32,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:32,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:32,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:32,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:32,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:32,714 INFO L124 PetriNetUnfolderBase]: 221/449 cut-off events. [2023-11-29 06:48:32,715 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-29 06:48:32,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 449 events. 221/449 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2277 event pairs, 192 based on Foata normal form. 10/367 useless extension candidates. Maximal degree in co-relation 948. Up to 319 conditions per place. [2023-11-29 06:48:32,718 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 14/41 dead transitions. [2023-11-29 06:48:32,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 180 flow [2023-11-29 06:48:32,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:48:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:48:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2023-11-29 06:48:32,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2023-11-29 06:48:32,721 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 63 transitions. [2023-11-29 06:48:32,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 63 transitions. [2023-11-29 06:48:32,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:32,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 63 transitions. [2023-11-29 06:48:32,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:32,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 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 06:48:32,723 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 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 06:48:32,723 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 74 flow. Second operand 4 states and 63 transitions. [2023-11-29 06:48:32,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 180 flow [2023-11-29 06:48:32,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:48:32,726 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 86 flow [2023-11-29 06:48:32,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-29 06:48:32,727 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-11-29 06:48:32,727 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 86 flow [2023-11-29 06:48:32,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:32,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:32,728 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:32,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:48:32,728 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 06:48:32,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash -185195771, now seen corresponding path program 1 times [2023-11-29 06:48:32,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:32,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637135646] [2023-11-29 06:48:32,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:32,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:33,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:33,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637135646] [2023-11-29 06:48:33,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637135646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:33,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928618626] [2023-11-29 06:48:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:33,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:33,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:33,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:33,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:48:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:33,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 06:48:33,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:33,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:48:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:33,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:34,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-11-29 06:48:34,185 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:48:34,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2023-11-29 06:48:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:34,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928618626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:34,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:34,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-29 06:48:34,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720898034] [2023-11-29 06:48:34,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:34,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:48:34,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:34,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:48:34,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:48:34,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:34,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 86 flow. Second operand has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:34,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:34,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:34,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:35,132 INFO L124 PetriNetUnfolderBase]: 805/1558 cut-off events. [2023-11-29 06:48:35,132 INFO L125 PetriNetUnfolderBase]: For 271/271 co-relation queries the response was YES. [2023-11-29 06:48:35,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3355 conditions, 1558 events. 805/1558 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9662 event pairs, 282 based on Foata normal form. 5/1270 useless extension candidates. Maximal degree in co-relation 3347. Up to 327 conditions per place. [2023-11-29 06:48:35,144 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 97 selfloop transitions, 21 changer transitions 32/155 dead transitions. [2023-11-29 06:48:35,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 155 transitions, 728 flow [2023-11-29 06:48:35,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:48:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:48:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 249 transitions. [2023-11-29 06:48:35,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133004926108374 [2023-11-29 06:48:35,147 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 249 transitions. [2023-11-29 06:48:35,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 249 transitions. [2023-11-29 06:48:35,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:35,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 249 transitions. [2023-11-29 06:48:35,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 17.785714285714285) internal successors, (249), 14 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:35,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 29.0) internal successors, (435), 15 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:35,152 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 29.0) internal successors, (435), 15 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:35,152 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 86 flow. Second operand 14 states and 249 transitions. [2023-11-29 06:48:35,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 155 transitions, 728 flow [2023-11-29 06:48:35,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 155 transitions, 716 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-29 06:48:35,158 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 260 flow [2023-11-29 06:48:35,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=260, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-11-29 06:48:35,159 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 24 predicate places. [2023-11-29 06:48:35,159 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 260 flow [2023-11-29 06:48:35,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.266666666666667) internal successors, (154), 15 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:35,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:35,160 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:35,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:48:35,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:35,365 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 06:48:35,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:35,365 INFO L85 PathProgramCache]: Analyzing trace with hash -127230976, now seen corresponding path program 2 times [2023-11-29 06:48:35,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:35,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311371672] [2023-11-29 06:48:35,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:35,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:36,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:36,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311371672] [2023-11-29 06:48:36,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311371672] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:36,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611070176] [2023-11-29 06:48:36,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:48:36,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:36,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:36,637 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:36,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:48:36,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:48:36,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:36,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:48:36,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:48:36,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:36,910 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:48:36,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-11-29 06:48:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:48:36,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611070176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:36,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:36,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 14 [2023-11-29 06:48:36,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489225916] [2023-11-29 06:48:36,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:36,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:48:36,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:36,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:48:36,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:48:36,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:36,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 260 flow. Second operand has 15 states, 15 states have (on average 9.733333333333333) internal successors, (146), 15 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 06:48:36,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:36,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:36,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:37,676 INFO L124 PetriNetUnfolderBase]: 1036/2023 cut-off events. [2023-11-29 06:48:37,676 INFO L125 PetriNetUnfolderBase]: For 1526/1526 co-relation queries the response was YES. [2023-11-29 06:48:37,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4907 conditions, 2023 events. 1036/2023 cut-off events. For 1526/1526 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13311 event pairs, 285 based on Foata normal form. 1/1650 useless extension candidates. Maximal degree in co-relation 4892. Up to 528 conditions per place. [2023-11-29 06:48:37,688 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 61 selfloop transitions, 24 changer transitions 23/113 dead transitions. [2023-11-29 06:48:37,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 113 transitions, 684 flow [2023-11-29 06:48:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:48:37,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:48:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 178 transitions. [2023-11-29 06:48:37,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114942528735632 [2023-11-29 06:48:37,690 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 178 transitions. [2023-11-29 06:48:37,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 178 transitions. [2023-11-29 06:48:37,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:37,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 178 transitions. [2023-11-29 06:48:37,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:37,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:37,693 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:37,693 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 260 flow. Second operand 12 states and 178 transitions. [2023-11-29 06:48:37,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 113 transitions, 684 flow [2023-11-29 06:48:37,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 113 transitions, 662 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-29 06:48:37,704 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 355 flow [2023-11-29 06:48:37,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=355, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2023-11-29 06:48:37,705 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 36 predicate places. [2023-11-29 06:48:37,705 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 355 flow [2023-11-29 06:48:37,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.733333333333333) internal successors, (146), 15 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 06:48:37,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:37,706 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:37,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:48:37,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:37,907 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 06:48:37,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash -932983080, now seen corresponding path program 3 times [2023-11-29 06:48:37,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:37,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269885411] [2023-11-29 06:48:37,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:37,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:48:37,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:37,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269885411] [2023-11-29 06:48:37,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269885411] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:37,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620682174] [2023-11-29 06:48:37,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:48:37,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:37,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:37,997 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:37,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:48:38,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:48:38,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:38,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:48:38,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:48:38,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:48:38,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620682174] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:38,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:38,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2023-11-29 06:48:38,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819125531] [2023-11-29 06:48:38,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:38,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:48:38,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:38,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:48:38,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:48:38,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:38,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 355 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:38,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:38,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:38,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:38,745 INFO L124 PetriNetUnfolderBase]: 1802/3490 cut-off events. [2023-11-29 06:48:38,745 INFO L125 PetriNetUnfolderBase]: For 4076/4076 co-relation queries the response was YES. [2023-11-29 06:48:38,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8798 conditions, 3490 events. 1802/3490 cut-off events. For 4076/4076 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 25267 event pairs, 679 based on Foata normal form. 50/2904 useless extension candidates. Maximal degree in co-relation 8780. Up to 1408 conditions per place. [2023-11-29 06:48:38,766 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 68 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2023-11-29 06:48:38,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 91 transitions, 733 flow [2023-11-29 06:48:38,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:48:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:48:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2023-11-29 06:48:38,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6637931034482759 [2023-11-29 06:48:38,767 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 77 transitions. [2023-11-29 06:48:38,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 77 transitions. [2023-11-29 06:48:38,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:38,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 77 transitions. [2023-11-29 06:48:38,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 19.25) internal successors, (77), 4 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 06:48:38,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 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 06:48:38,769 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 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 06:48:38,769 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 355 flow. Second operand 4 states and 77 transitions. [2023-11-29 06:48:38,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 91 transitions, 733 flow [2023-11-29 06:48:38,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 91 transitions, 650 flow, removed 21 selfloop flow, removed 9 redundant places. [2023-11-29 06:48:38,782 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 498 flow [2023-11-29 06:48:38,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=498, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2023-11-29 06:48:38,783 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2023-11-29 06:48:38,783 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 498 flow [2023-11-29 06:48:38,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:38,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:38,783 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:38,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:48:38,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:38,984 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 06:48:38,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:38,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1203621691, now seen corresponding path program 4 times [2023-11-29 06:48:38,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:38,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63070501] [2023-11-29 06:48:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:38,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:39,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:39,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63070501] [2023-11-29 06:48:39,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63070501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:39,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762546150] [2023-11-29 06:48:39,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:48:39,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:39,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:39,452 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:39,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:48:39,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:48:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:39,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 06:48:39,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:48:39,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:39,687 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:48:39,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-11-29 06:48:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 06:48:39,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762546150] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:39,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:39,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 13 [2023-11-29 06:48:39,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241896201] [2023-11-29 06:48:39,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:39,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:48:39,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:48:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:48:39,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:39,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 498 flow. Second operand has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 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 06:48:39,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:39,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:39,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:40,937 INFO L124 PetriNetUnfolderBase]: 2650/5178 cut-off events. [2023-11-29 06:48:40,937 INFO L125 PetriNetUnfolderBase]: For 9368/9368 co-relation queries the response was YES. [2023-11-29 06:48:40,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13625 conditions, 5178 events. 2650/5178 cut-off events. For 9368/9368 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 39644 event pairs, 489 based on Foata normal form. 108/4345 useless extension candidates. Maximal degree in co-relation 13608. Up to 784 conditions per place. [2023-11-29 06:48:40,967 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 99 selfloop transitions, 35 changer transitions 80/219 dead transitions. [2023-11-29 06:48:40,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 219 transitions, 1501 flow [2023-11-29 06:48:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:48:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 06:48:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 304 transitions. [2023-11-29 06:48:40,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166328600405679 [2023-11-29 06:48:40,970 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 304 transitions. [2023-11-29 06:48:40,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 304 transitions. [2023-11-29 06:48:40,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:40,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 304 transitions. [2023-11-29 06:48:40,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 17.88235294117647) internal successors, (304), 17 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 06:48:40,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:40,974 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:40,974 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 498 flow. Second operand 17 states and 304 transitions. [2023-11-29 06:48:40,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 219 transitions, 1501 flow [2023-11-29 06:48:40,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 219 transitions, 1471 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-11-29 06:48:40,996 INFO L231 Difference]: Finished difference. Result has 85 places, 64 transitions, 626 flow [2023-11-29 06:48:40,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=626, PETRI_PLACES=85, PETRI_TRANSITIONS=64} [2023-11-29 06:48:40,997 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 57 predicate places. [2023-11-29 06:48:40,997 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 64 transitions, 626 flow [2023-11-29 06:48:40,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 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 06:48:40,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:40,998 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:41,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:48:41,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:41,200 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 06:48:41,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:41,201 INFO L85 PathProgramCache]: Analyzing trace with hash -157615995, now seen corresponding path program 5 times [2023-11-29 06:48:41,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:41,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303197613] [2023-11-29 06:48:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:41,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:41,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:41,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303197613] [2023-11-29 06:48:41,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303197613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:41,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590876284] [2023-11-29 06:48:41,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:48:41,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:41,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:41,647 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:41,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:48:41,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:48:41,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:41,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:48:41,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:41,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:48:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:42,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:42,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2023-11-29 06:48:42,484 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:48:42,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-11-29 06:48:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:42,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590876284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:42,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:42,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-29 06:48:42,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629397541] [2023-11-29 06:48:42,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:42,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:48:42,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:42,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:48:42,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:48:42,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:42,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 64 transitions, 626 flow. Second operand has 23 states, 23 states have (on average 9.695652173913043) internal successors, (223), 23 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:42,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:42,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:42,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:44,249 INFO L124 PetriNetUnfolderBase]: 2277/4488 cut-off events. [2023-11-29 06:48:44,249 INFO L125 PetriNetUnfolderBase]: For 15750/15750 co-relation queries the response was YES. [2023-11-29 06:48:44,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13138 conditions, 4488 events. 2277/4488 cut-off events. For 15750/15750 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 33800 event pairs, 646 based on Foata normal form. 3/3682 useless extension candidates. Maximal degree in co-relation 13111. Up to 1196 conditions per place. [2023-11-29 06:48:44,271 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 131 selfloop transitions, 37 changer transitions 66/239 dead transitions. [2023-11-29 06:48:44,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 239 transitions, 1760 flow [2023-11-29 06:48:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:48:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 06:48:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 358 transitions. [2023-11-29 06:48:44,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878489326765188 [2023-11-29 06:48:44,273 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 358 transitions. [2023-11-29 06:48:44,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 358 transitions. [2023-11-29 06:48:44,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:44,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 358 transitions. [2023-11-29 06:48:44,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 17.047619047619047) internal successors, (358), 21 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:44,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 29.0) internal successors, (638), 22 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:44,277 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 29.0) internal successors, (638), 22 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:44,277 INFO L175 Difference]: Start difference. First operand has 85 places, 64 transitions, 626 flow. Second operand 21 states and 358 transitions. [2023-11-29 06:48:44,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 239 transitions, 1760 flow [2023-11-29 06:48:44,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 239 transitions, 1603 flow, removed 53 selfloop flow, removed 8 redundant places. [2023-11-29 06:48:44,320 INFO L231 Difference]: Finished difference. Result has 101 places, 73 transitions, 752 flow [2023-11-29 06:48:44,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=752, PETRI_PLACES=101, PETRI_TRANSITIONS=73} [2023-11-29 06:48:44,321 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 73 predicate places. [2023-11-29 06:48:44,321 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 73 transitions, 752 flow [2023-11-29 06:48:44,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.695652173913043) internal successors, (223), 23 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:44,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:44,321 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:44,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:48:44,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:44,522 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 06:48:44,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:44,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1003444850, now seen corresponding path program 6 times [2023-11-29 06:48:44,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:44,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142363578] [2023-11-29 06:48:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:44,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 06:48:44,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:44,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142363578] [2023-11-29 06:48:44,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142363578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:44,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076559934] [2023-11-29 06:48:44,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:48:44,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:44,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:44,647 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:44,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:48:44,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:48:44,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:44,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:48:44,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:48:44,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:48:44,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076559934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:44,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:44,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 06:48:44,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526283510] [2023-11-29 06:48:44,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:45,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:48:45,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:48:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:48:45,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:45,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 73 transitions, 752 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:45,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:45,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:45,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:45,692 INFO L124 PetriNetUnfolderBase]: 2005/3967 cut-off events. [2023-11-29 06:48:45,692 INFO L125 PetriNetUnfolderBase]: For 11597/11597 co-relation queries the response was YES. [2023-11-29 06:48:45,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11413 conditions, 3967 events. 2005/3967 cut-off events. For 11597/11597 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 29233 event pairs, 864 based on Foata normal form. 10/3263 useless extension candidates. Maximal degree in co-relation 11381. Up to 2953 conditions per place. [2023-11-29 06:48:45,717 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 58 selfloop transitions, 8 changer transitions 34/105 dead transitions. [2023-11-29 06:48:45,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 105 transitions, 977 flow [2023-11-29 06:48:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:48:45,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:48:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2023-11-29 06:48:45,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467980295566502 [2023-11-29 06:48:45,719 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 111 transitions. [2023-11-29 06:48:45,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 111 transitions. [2023-11-29 06:48:45,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:45,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 111 transitions. [2023-11-29 06:48:45,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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 06:48:45,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:45,721 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:45,721 INFO L175 Difference]: Start difference. First operand has 101 places, 73 transitions, 752 flow. Second operand 7 states and 111 transitions. [2023-11-29 06:48:45,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 105 transitions, 977 flow [2023-11-29 06:48:45,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 105 transitions, 898 flow, removed 24 selfloop flow, removed 14 redundant places. [2023-11-29 06:48:45,756 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 615 flow [2023-11-29 06:48:45,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=615, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2023-11-29 06:48:45,757 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2023-11-29 06:48:45,757 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 615 flow [2023-11-29 06:48:45,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:45,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:45,757 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:45,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:48:45,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:45,958 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 06:48:45,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:45,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1204863891, now seen corresponding path program 7 times [2023-11-29 06:48:45,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:45,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444836983] [2023-11-29 06:48:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:45,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:48:46,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:46,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444836983] [2023-11-29 06:48:46,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444836983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:46,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746699731] [2023-11-29 06:48:46,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:48:46,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:46,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:46,035 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:46,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:48:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:46,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:48:46,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:48:46,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:48:46,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746699731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:46,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:46,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 15 [2023-11-29 06:48:46,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933559425] [2023-11-29 06:48:46,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:46,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:48:46,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:48:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:48:46,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:46,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 615 flow. Second operand has 16 states, 16 states have (on average 10.3125) internal successors, (165), 16 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 06:48:46,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:46,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:46,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:47,244 INFO L124 PetriNetUnfolderBase]: 3140/6056 cut-off events. [2023-11-29 06:48:47,244 INFO L125 PetriNetUnfolderBase]: For 16669/16669 co-relation queries the response was YES. [2023-11-29 06:48:47,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17196 conditions, 6056 events. 3140/6056 cut-off events. For 16669/16669 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 46468 event pairs, 713 based on Foata normal form. 40/5021 useless extension candidates. Maximal degree in co-relation 17167. Up to 1439 conditions per place. [2023-11-29 06:48:47,267 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 75 selfloop transitions, 40 changer transitions 98/218 dead transitions. [2023-11-29 06:48:47,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 218 transitions, 1735 flow [2023-11-29 06:48:47,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:48:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:48:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 279 transitions. [2023-11-29 06:48:47,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6012931034482759 [2023-11-29 06:48:47,270 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 279 transitions. [2023-11-29 06:48:47,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 279 transitions. [2023-11-29 06:48:47,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:47,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 279 transitions. [2023-11-29 06:48:47,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 17.4375) internal successors, (279), 16 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:47,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:47,273 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 29.0) internal successors, (493), 17 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:47,273 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 615 flow. Second operand 16 states and 279 transitions. [2023-11-29 06:48:47,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 218 transitions, 1735 flow [2023-11-29 06:48:47,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 218 transitions, 1714 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-11-29 06:48:47,302 INFO L231 Difference]: Finished difference. Result has 94 places, 81 transitions, 965 flow [2023-11-29 06:48:47,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=965, PETRI_PLACES=94, PETRI_TRANSITIONS=81} [2023-11-29 06:48:47,303 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 66 predicate places. [2023-11-29 06:48:47,303 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 81 transitions, 965 flow [2023-11-29 06:48:47,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.3125) internal successors, (165), 16 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 06:48:47,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:47,303 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:47,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:48:47,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:47,504 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 06:48:47,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:47,504 INFO L85 PathProgramCache]: Analyzing trace with hash 368366517, now seen corresponding path program 8 times [2023-11-29 06:48:47,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:47,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583721617] [2023-11-29 06:48:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:47,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:48,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:48,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583721617] [2023-11-29 06:48:48,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583721617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:48,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97284137] [2023-11-29 06:48:48,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:48:48,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:48,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:48,999 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:49,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:48:49,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:48:49,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:49,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:48:49,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:48:49,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:49,304 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 06:48:49,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:48:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 06:48:49,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97284137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:49,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:49,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 6] total 21 [2023-11-29 06:48:49,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20497503] [2023-11-29 06:48:49,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:49,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:48:49,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:48:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:48:49,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:49,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 81 transitions, 965 flow. Second operand has 22 states, 22 states have (on average 9.181818181818182) internal successors, (202), 22 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:49,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:49,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:49,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:50,343 INFO L124 PetriNetUnfolderBase]: 2945/5672 cut-off events. [2023-11-29 06:48:50,343 INFO L125 PetriNetUnfolderBase]: For 22251/22251 co-relation queries the response was YES. [2023-11-29 06:48:50,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17551 conditions, 5672 events. 2945/5672 cut-off events. For 22251/22251 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 42317 event pairs, 510 based on Foata normal form. 4/4680 useless extension candidates. Maximal degree in co-relation 17522. Up to 1410 conditions per place. [2023-11-29 06:48:50,402 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 63 selfloop transitions, 56 changer transitions 23/147 dead transitions. [2023-11-29 06:48:50,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 147 transitions, 1591 flow [2023-11-29 06:48:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:48:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 06:48:50,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 181 transitions. [2023-11-29 06:48:50,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48010610079575594 [2023-11-29 06:48:50,404 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 181 transitions. [2023-11-29 06:48:50,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 181 transitions. [2023-11-29 06:48:50,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:50,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 181 transitions. [2023-11-29 06:48:50,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 13.923076923076923) internal successors, (181), 13 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 06:48:50,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 29.0) internal successors, (406), 14 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:50,406 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 29.0) internal successors, (406), 14 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:50,407 INFO L175 Difference]: Start difference. First operand has 94 places, 81 transitions, 965 flow. Second operand 13 states and 181 transitions. [2023-11-29 06:48:50,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 147 transitions, 1591 flow [2023-11-29 06:48:50,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 147 transitions, 1364 flow, removed 103 selfloop flow, removed 9 redundant places. [2023-11-29 06:48:50,462 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 1043 flow [2023-11-29 06:48:50,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1043, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2023-11-29 06:48:50,463 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 57 predicate places. [2023-11-29 06:48:50,463 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 1043 flow [2023-11-29 06:48:50,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.181818181818182) internal successors, (202), 22 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:50,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:50,464 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:50,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:48:50,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:50,665 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 06:48:50,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:50,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1434268923, now seen corresponding path program 9 times [2023-11-29 06:48:50,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:50,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402594782] [2023-11-29 06:48:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:50,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:51,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:51,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402594782] [2023-11-29 06:48:51,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402594782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:51,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724476517] [2023-11-29 06:48:51,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:48:51,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:51,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:51,321 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:51,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:48:51,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:48:51,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:51,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:48:51,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 06:48:51,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:52,226 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:48:52,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-11-29 06:48:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 06:48:52,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724476517] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:52,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:52,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2023-11-29 06:48:52,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098341321] [2023-11-29 06:48:52,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:52,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 06:48:52,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:52,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 06:48:52,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:48:52,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:52,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 1043 flow. Second operand has 28 states, 28 states have (on average 9.357142857142858) internal successors, (262), 28 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:52,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:52,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:52,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:54,357 INFO L124 PetriNetUnfolderBase]: 4351/8397 cut-off events. [2023-11-29 06:48:54,357 INFO L125 PetriNetUnfolderBase]: For 22259/22259 co-relation queries the response was YES. [2023-11-29 06:48:54,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23382 conditions, 8397 events. 4351/8397 cut-off events. For 22259/22259 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 66733 event pairs, 1490 based on Foata normal form. 4/6940 useless extension candidates. Maximal degree in co-relation 23357. Up to 2858 conditions per place. [2023-11-29 06:48:54,377 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 64 selfloop transitions, 14 changer transitions 164/247 dead transitions. [2023-11-29 06:48:54,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 247 transitions, 2344 flow [2023-11-29 06:48:54,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:48:54,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-29 06:48:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 282 transitions. [2023-11-29 06:48:54,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5720081135902637 [2023-11-29 06:48:54,379 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 282 transitions. [2023-11-29 06:48:54,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 282 transitions. [2023-11-29 06:48:54,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:54,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 282 transitions. [2023-11-29 06:48:54,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 16.58823529411765) internal successors, (282), 17 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:54,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:54,382 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 29.0) internal successors, (522), 18 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:54,382 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 1043 flow. Second operand 17 states and 282 transitions. [2023-11-29 06:48:54,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 247 transitions, 2344 flow [2023-11-29 06:48:54,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 247 transitions, 2112 flow, removed 52 selfloop flow, removed 10 redundant places. [2023-11-29 06:48:54,437 INFO L231 Difference]: Finished difference. Result has 98 places, 73 transitions, 792 flow [2023-11-29 06:48:54,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=792, PETRI_PLACES=98, PETRI_TRANSITIONS=73} [2023-11-29 06:48:54,438 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 70 predicate places. [2023-11-29 06:48:54,438 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 73 transitions, 792 flow [2023-11-29 06:48:54,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.357142857142858) internal successors, (262), 28 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:54,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:54,438 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:54,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 06:48:54,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:48:54,640 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 06:48:54,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1530025952, now seen corresponding path program 10 times [2023-11-29 06:48:54,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:54,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053827011] [2023-11-29 06:48:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:54,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:48:55,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:55,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053827011] [2023-11-29 06:48:55,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053827011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:55,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72637981] [2023-11-29 06:48:55,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:48:55,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:55,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:55,603 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:55,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:48:55,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:48:55,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:55,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:48:55,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:48:55,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:55,928 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 06:48:55,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:48:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:48:55,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72637981] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:55,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:55,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 22 [2023-11-29 06:48:55,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323989947] [2023-11-29 06:48:55,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:55,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:48:55,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:55,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:48:55,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:48:55,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:55,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 73 transitions, 792 flow. Second operand has 23 states, 23 states have (on average 9.478260869565217) internal successors, (218), 23 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:55,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:55,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:55,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:57,544 INFO L124 PetriNetUnfolderBase]: 3716/7032 cut-off events. [2023-11-29 06:48:57,544 INFO L125 PetriNetUnfolderBase]: For 16816/16816 co-relation queries the response was YES. [2023-11-29 06:48:57,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19440 conditions, 7032 events. 3716/7032 cut-off events. For 16816/16816 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 52904 event pairs, 463 based on Foata normal form. 12/5815 useless extension candidates. Maximal degree in co-relation 19408. Up to 1056 conditions per place. [2023-11-29 06:48:57,568 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 115 selfloop transitions, 77 changer transitions 77/274 dead transitions. [2023-11-29 06:48:57,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 274 transitions, 2140 flow [2023-11-29 06:48:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:48:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 06:48:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 384 transitions. [2023-11-29 06:48:57,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6018808777429467 [2023-11-29 06:48:57,570 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 384 transitions. [2023-11-29 06:48:57,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 384 transitions. [2023-11-29 06:48:57,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:57,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 384 transitions. [2023-11-29 06:48:57,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 17.454545454545453) internal successors, (384), 22 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:57,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:57,573 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 29.0) internal successors, (667), 23 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:57,573 INFO L175 Difference]: Start difference. First operand has 98 places, 73 transitions, 792 flow. Second operand 22 states and 384 transitions. [2023-11-29 06:48:57,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 274 transitions, 2140 flow [2023-11-29 06:48:57,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 274 transitions, 2000 flow, removed 51 selfloop flow, removed 14 redundant places. [2023-11-29 06:48:57,611 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 1365 flow [2023-11-29 06:48:57,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1365, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2023-11-29 06:48:57,612 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 77 predicate places. [2023-11-29 06:48:57,612 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 1365 flow [2023-11-29 06:48:57,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.478260869565217) internal successors, (218), 23 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:57,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:57,612 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:57,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 06:48:57,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:48:57,813 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 06:48:57,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:48:57,813 INFO L85 PathProgramCache]: Analyzing trace with hash -466474472, now seen corresponding path program 11 times [2023-11-29 06:48:57,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:48:57,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523038360] [2023-11-29 06:48:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:48:57,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:48:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:48:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:48:57,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:48:57,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523038360] [2023-11-29 06:48:57,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523038360] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:48:57,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626972828] [2023-11-29 06:48:57,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:48:57,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:48:57,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:48:57,917 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:48:57,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:48:58,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:48:58,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:48:58,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:48:58,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:48:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:48:58,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:48:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 06:48:58,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626972828] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:48:58,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:48:58,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 12 [2023-11-29 06:48:58,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614428774] [2023-11-29 06:48:58,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:48:58,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:48:58,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:48:58,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:48:58,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:48:58,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:48:58,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 1365 flow. Second operand has 13 states, 13 states have (on average 11.076923076923077) internal successors, (144), 13 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:58,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:48:58,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:48:58,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:48:59,714 INFO L124 PetriNetUnfolderBase]: 6800/12760 cut-off events. [2023-11-29 06:48:59,714 INFO L125 PetriNetUnfolderBase]: For 41336/41336 co-relation queries the response was YES. [2023-11-29 06:48:59,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36375 conditions, 12760 events. 6800/12760 cut-off events. For 41336/41336 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 105575 event pairs, 1407 based on Foata normal form. 20/10551 useless extension candidates. Maximal degree in co-relation 36339. Up to 3206 conditions per place. [2023-11-29 06:48:59,756 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 107 selfloop transitions, 99 changer transitions 0/211 dead transitions. [2023-11-29 06:48:59,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 211 transitions, 2978 flow [2023-11-29 06:48:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:48:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:48:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2023-11-29 06:48:59,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6954022988505747 [2023-11-29 06:48:59,757 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 121 transitions. [2023-11-29 06:48:59,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 121 transitions. [2023-11-29 06:48:59,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:48:59,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 121 transitions. [2023-11-29 06:48:59,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:59,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:59,758 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:59,758 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 1365 flow. Second operand 6 states and 121 transitions. [2023-11-29 06:48:59,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 211 transitions, 2978 flow [2023-11-29 06:48:59,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 211 transitions, 2607 flow, removed 118 selfloop flow, removed 12 redundant places. [2023-11-29 06:48:59,836 INFO L231 Difference]: Finished difference. Result has 99 places, 159 transitions, 2214 flow [2023-11-29 06:48:59,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2214, PETRI_PLACES=99, PETRI_TRANSITIONS=159} [2023-11-29 06:48:59,836 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 71 predicate places. [2023-11-29 06:48:59,836 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 159 transitions, 2214 flow [2023-11-29 06:48:59,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.076923076923077) internal successors, (144), 13 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:48:59,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:48:59,837 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:48:59,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:49:00,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:49:00,037 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 06:49:00,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:00,038 INFO L85 PathProgramCache]: Analyzing trace with hash -526872837, now seen corresponding path program 12 times [2023-11-29 06:49:00,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:00,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010843436] [2023-11-29 06:49:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:00,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:00,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010843436] [2023-11-29 06:49:00,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010843436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:00,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382618775] [2023-11-29 06:49:00,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:49:00,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:00,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:00,761 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:00,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:49:00,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 06:49:00,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:49:00,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 06:49:00,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:01,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:49:01,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:49:01,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:49:01,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:49:01,776 INFO L349 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2023-11-29 06:49:01,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 19 [2023-11-29 06:49:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:49:01,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:49:03,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 87 [2023-11-29 06:49:03,242 INFO L349 Elim1Store]: treesize reduction 48, result has 26.2 percent of original size [2023-11-29 06:49:03,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 128 treesize of output 112 [2023-11-29 06:49:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:49:03,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382618775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:49:03,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:49:03,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2023-11-29 06:49:03,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579025996] [2023-11-29 06:49:03,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:49:03,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 06:49:03,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 06:49:03,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 06:49:03,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:49:03,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 159 transitions, 2214 flow. Second operand has 38 states, 38 states have (on average 9.105263157894736) internal successors, (346), 38 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:03,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:49:03,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:49:03,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:49:13,552 INFO L124 PetriNetUnfolderBase]: 11268/21802 cut-off events. [2023-11-29 06:49:13,552 INFO L125 PetriNetUnfolderBase]: For 58058/58058 co-relation queries the response was YES. [2023-11-29 06:49:13,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60493 conditions, 21802 events. 11268/21802 cut-off events. For 58058/58058 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 200576 event pairs, 2331 based on Foata normal form. 335/18328 useless extension candidates. Maximal degree in co-relation 60457. Up to 7485 conditions per place. [2023-11-29 06:49:13,633 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 178 selfloop transitions, 39 changer transitions 380/602 dead transitions. [2023-11-29 06:49:13,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 602 transitions, 5663 flow [2023-11-29 06:49:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 06:49:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-29 06:49:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 698 transitions. [2023-11-29 06:49:13,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017241379310345 [2023-11-29 06:49:13,637 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 698 transitions. [2023-11-29 06:49:13,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 698 transitions. [2023-11-29 06:49:13,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:49:13,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 698 transitions. [2023-11-29 06:49:13,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 17.45) internal successors, (698), 40 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:13,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 29.0) internal successors, (1189), 41 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:13,643 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 29.0) internal successors, (1189), 41 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:13,643 INFO L175 Difference]: Start difference. First operand has 99 places, 159 transitions, 2214 flow. Second operand 40 states and 698 transitions. [2023-11-29 06:49:13,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 602 transitions, 5663 flow [2023-11-29 06:49:13,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 602 transitions, 5569 flow, removed 47 selfloop flow, removed 0 redundant places. [2023-11-29 06:49:13,871 INFO L231 Difference]: Finished difference. Result has 165 places, 141 transitions, 2172 flow [2023-11-29 06:49:13,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2172, PETRI_PLACES=165, PETRI_TRANSITIONS=141} [2023-11-29 06:49:13,872 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 137 predicate places. [2023-11-29 06:49:13,872 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 141 transitions, 2172 flow [2023-11-29 06:49:13,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.105263157894736) internal successors, (346), 38 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:13,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:49:13,872 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:13,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 06:49:14,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:49:14,074 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 06:49:14,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:14,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1656907141, now seen corresponding path program 13 times [2023-11-29 06:49:14,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:14,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022007620] [2023-11-29 06:49:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:14,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:14,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:14,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022007620] [2023-11-29 06:49:14,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022007620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:14,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595667456] [2023-11-29 06:49:14,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:49:14,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:14,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:14,810 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:14,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:49:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:14,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 06:49:14,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:15,581 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:49:15,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-11-29 06:49:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:15,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:49:15,735 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 06:49:15,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:49:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:16,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595667456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:49:16,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:49:16,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 41 [2023-11-29 06:49:16,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617391085] [2023-11-29 06:49:16,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:49:16,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 06:49:16,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:16,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 06:49:16,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 06:49:16,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:49:16,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 141 transitions, 2172 flow. Second operand has 42 states, 42 states have (on average 9.238095238095237) internal successors, (388), 42 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:16,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:49:16,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:49:16,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:49:20,457 INFO L124 PetriNetUnfolderBase]: 6128/11867 cut-off events. [2023-11-29 06:49:20,457 INFO L125 PetriNetUnfolderBase]: For 79462/79462 co-relation queries the response was YES. [2023-11-29 06:49:20,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38244 conditions, 11867 events. 6128/11867 cut-off events. For 79462/79462 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 98971 event pairs, 2493 based on Foata normal form. 1/9803 useless extension candidates. Maximal degree in co-relation 38180. Up to 7485 conditions per place. [2023-11-29 06:49:20,515 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 222 selfloop transitions, 40 changer transitions 80/347 dead transitions. [2023-11-29 06:49:20,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 347 transitions, 3689 flow [2023-11-29 06:49:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 06:49:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 06:49:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 419 transitions. [2023-11-29 06:49:20,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5779310344827586 [2023-11-29 06:49:20,517 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 419 transitions. [2023-11-29 06:49:20,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 419 transitions. [2023-11-29 06:49:20,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:49:20,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 419 transitions. [2023-11-29 06:49:20,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 16.76) internal successors, (419), 25 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:20,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 29.0) internal successors, (754), 26 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:20,521 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 29.0) internal successors, (754), 26 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:20,521 INFO L175 Difference]: Start difference. First operand has 165 places, 141 transitions, 2172 flow. Second operand 25 states and 419 transitions. [2023-11-29 06:49:20,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 347 transitions, 3689 flow [2023-11-29 06:49:21,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 347 transitions, 3323 flow, removed 165 selfloop flow, removed 30 redundant places. [2023-11-29 06:49:21,105 INFO L231 Difference]: Finished difference. Result has 142 places, 147 transitions, 2109 flow [2023-11-29 06:49:21,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2109, PETRI_PLACES=142, PETRI_TRANSITIONS=147} [2023-11-29 06:49:21,106 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 114 predicate places. [2023-11-29 06:49:21,106 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 147 transitions, 2109 flow [2023-11-29 06:49:21,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 9.238095238095237) internal successors, (388), 42 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:21,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:49:21,107 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:21,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:49:21,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:49:21,307 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 06:49:21,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:21,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2041881610, now seen corresponding path program 14 times [2023-11-29 06:49:21,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:21,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268101373] [2023-11-29 06:49:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:21,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:49:22,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268101373] [2023-11-29 06:49:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268101373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853715523] [2023-11-29 06:49:22,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:49:22,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:22,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:22,505 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:22,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:49:22,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:49:22,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:49:22,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 06:49:22,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:49:22,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:49:22,947 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 06:49:22,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 06:49:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 06:49:22,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853715523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:49:22,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:49:22,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 10] total 28 [2023-11-29 06:49:22,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945336233] [2023-11-29 06:49:22,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:49:22,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 06:49:22,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:22,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 06:49:22,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:49:22,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:49:22,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 147 transitions, 2109 flow. Second operand has 29 states, 29 states have (on average 9.310344827586206) internal successors, (270), 29 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:22,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:49:22,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:49:22,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:49:26,756 INFO L124 PetriNetUnfolderBase]: 9088/17269 cut-off events. [2023-11-29 06:49:26,756 INFO L125 PetriNetUnfolderBase]: For 68762/68762 co-relation queries the response was YES. [2023-11-29 06:49:26,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51811 conditions, 17269 events. 9088/17269 cut-off events. For 68762/68762 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 147443 event pairs, 775 based on Foata normal form. 16/14266 useless extension candidates. Maximal degree in co-relation 51765. Up to 2640 conditions per place. [2023-11-29 06:49:26,852 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 145 selfloop transitions, 182 changer transitions 104/436 dead transitions. [2023-11-29 06:49:26,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 436 transitions, 4562 flow [2023-11-29 06:49:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:49:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 06:49:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 496 transitions. [2023-11-29 06:49:26,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6108374384236454 [2023-11-29 06:49:26,854 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 496 transitions. [2023-11-29 06:49:26,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 496 transitions. [2023-11-29 06:49:26,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:49:26,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 496 transitions. [2023-11-29 06:49:26,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 17.714285714285715) internal successors, (496), 28 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:26,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 29.0) internal successors, (841), 29 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:26,857 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 29.0) internal successors, (841), 29 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:26,858 INFO L175 Difference]: Start difference. First operand has 142 places, 147 transitions, 2109 flow. Second operand 28 states and 496 transitions. [2023-11-29 06:49:26,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 436 transitions, 4562 flow [2023-11-29 06:49:27,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 436 transitions, 4406 flow, removed 44 selfloop flow, removed 19 redundant places. [2023-11-29 06:49:27,236 INFO L231 Difference]: Finished difference. Result has 166 places, 208 transitions, 3636 flow [2023-11-29 06:49:27,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3636, PETRI_PLACES=166, PETRI_TRANSITIONS=208} [2023-11-29 06:49:27,237 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 138 predicate places. [2023-11-29 06:49:27,237 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 208 transitions, 3636 flow [2023-11-29 06:49:27,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.310344827586206) internal successors, (270), 29 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:27,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:49:27,238 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:27,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:49:27,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:49:27,438 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 06:49:27,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:27,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1205221011, now seen corresponding path program 15 times [2023-11-29 06:49:27,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:27,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357847242] [2023-11-29 06:49:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:27,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 06:49:27,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:27,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357847242] [2023-11-29 06:49:27,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357847242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:49:27,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511411409] [2023-11-29 06:49:27,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:49:27,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:27,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:27,575 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:27,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:49:27,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:49:27,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:49:27,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 06:49:27,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:28,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 06:49:28,506 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-11-29 06:49:28,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2023-11-29 06:49:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 06:49:28,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:49:29,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2023-11-29 06:49:29,399 INFO L349 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2023-11-29 06:49:29,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 64 [2023-11-29 06:49:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 06:49:29,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511411409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:49:29,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:49:29,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 12] total 27 [2023-11-29 06:49:29,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406775024] [2023-11-29 06:49:29,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:49:29,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 06:49:29,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:29,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 06:49:29,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2023-11-29 06:49:29,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-29 06:49:29,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 208 transitions, 3636 flow. Second operand has 28 states, 28 states have (on average 10.214285714285714) internal successors, (286), 28 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:29,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:49:29,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-29 06:49:29,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:49:35,927 INFO L124 PetriNetUnfolderBase]: 15080/28341 cut-off events. [2023-11-29 06:49:35,927 INFO L125 PetriNetUnfolderBase]: For 157341/157341 co-relation queries the response was YES. [2023-11-29 06:49:36,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92470 conditions, 28341 events. 15080/28341 cut-off events. For 157341/157341 co-relation queries the response was YES. Maximal size of possible extension queue 1008. Compared 258868 event pairs, 2527 based on Foata normal form. 46/23438 useless extension candidates. Maximal degree in co-relation 92408. Up to 5916 conditions per place. [2023-11-29 06:49:36,108 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 0 selfloop transitions, 0 changer transitions 530/530 dead transitions. [2023-11-29 06:49:36,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 530 transitions, 7370 flow [2023-11-29 06:49:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 06:49:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 06:49:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 461 transitions. [2023-11-29 06:49:36,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5887611749680716 [2023-11-29 06:49:36,110 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 461 transitions. [2023-11-29 06:49:36,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 461 transitions. [2023-11-29 06:49:36,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:49:36,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 461 transitions. [2023-11-29 06:49:36,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 17.074074074074073) internal successors, (461), 27 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:36,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 29.0) internal successors, (812), 28 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:36,112 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 29.0) internal successors, (812), 28 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:36,112 INFO L175 Difference]: Start difference. First operand has 166 places, 208 transitions, 3636 flow. Second operand 27 states and 461 transitions. [2023-11-29 06:49:36,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 530 transitions, 7370 flow [2023-11-29 06:49:36,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 530 transitions, 5407 flow, removed 347 selfloop flow, removed 45 redundant places. [2023-11-29 06:49:36,488 INFO L231 Difference]: Finished difference. Result has 142 places, 0 transitions, 0 flow [2023-11-29 06:49:36,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=0, PETRI_PLACES=142, PETRI_TRANSITIONS=0} [2023-11-29 06:49:36,488 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 114 predicate places. [2023-11-29 06:49:36,489 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 0 transitions, 0 flow [2023-11-29 06:49:36,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 10.214285714285714) internal successors, (286), 28 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:49:36,491 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-29 06:49:36,491 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-29 06:49:36,491 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-29 06:49:36,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:49:36,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:36,692 INFO L445 BasicCegarLoop]: Path program histogram: [15, 1, 1, 1, 1] [2023-11-29 06:49:36,695 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 06:49:36,695 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 06:49:36,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:49:36 BasicIcfg [2023-11-29 06:49:36,698 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 06:49:36,699 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 06:49:36,699 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 06:49:36,699 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 06:49:36,699 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:48:31" (3/4) ... [2023-11-29 06:49:36,701 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 06:49:36,703 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-29 06:49:36,703 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-29 06:49:36,709 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 80 nodes and edges [2023-11-29 06:49:36,709 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2023-11-29 06:49:36,709 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-29 06:49:36,709 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-29 06:49:36,783 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 06:49:36,784 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 06:49:36,784 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 06:49:36,785 INFO L158 Benchmark]: Toolchain (without parser) took 66474.22ms. Allocated memory was 180.4MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 144.2MB in the beginning and 1.4GB in the end (delta: -1.2GB). Peak memory consumption was 1.5GB. Max. memory is 16.1GB. [2023-11-29 06:49:36,786 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 117.4MB. Free memory is still 88.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:49:36,786 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.99ms. Allocated memory is still 180.4MB. Free memory was 144.2MB in the beginning and 150.4MB in the end (delta: -6.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 06:49:36,786 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.23ms. Allocated memory is still 180.4MB. Free memory was 150.4MB in the beginning and 148.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:49:36,787 INFO L158 Benchmark]: Boogie Preprocessor took 48.80ms. Allocated memory is still 180.4MB. Free memory was 148.3MB in the beginning and 145.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 06:49:36,787 INFO L158 Benchmark]: RCFGBuilder took 612.67ms. Allocated memory is still 180.4MB. Free memory was 145.8MB in the beginning and 106.0MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2023-11-29 06:49:36,787 INFO L158 Benchmark]: TraceAbstraction took 65353.00ms. Allocated memory was 180.4MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 105.4MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2023-11-29 06:49:36,788 INFO L158 Benchmark]: Witness Printer took 85.97ms. Allocated memory is still 2.9GB. Free memory was 1.4GB in the beginning and 1.4GB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 06:49:36,790 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 117.4MB. Free memory is still 88.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.99ms. Allocated memory is still 180.4MB. Free memory was 144.2MB in the beginning and 150.4MB in the end (delta: -6.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.23ms. Allocated memory is still 180.4MB. Free memory was 150.4MB in the beginning and 148.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.80ms. Allocated memory is still 180.4MB. Free memory was 148.3MB in the beginning and 145.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 612.67ms. Allocated memory is still 180.4MB. Free memory was 145.8MB in the beginning and 106.0MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. * TraceAbstraction took 65353.00ms. Allocated memory was 180.4MB in the beginning and 2.9GB in the end (delta: 2.7GB). Free memory was 105.4MB in the beginning and 1.4GB in the end (delta: -1.3GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. * Witness Printer took 85.97ms. Allocated memory is still 2.9GB. Free memory was 1.4GB in the beginning and 1.4GB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 86]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 39 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 65.2s, OverallIterations: 19, TraceHistogramMax: 6, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 40.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 4845 SdHoareTripleChecker+Valid, 11.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4845 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 10.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 244 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12514 IncrementalHoareTripleChecker+Invalid, 12759 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 244 mSolverCounterUnsat, 0 mSDtfsCounter, 12514 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1495 GetRequests, 979 SyntacticMatches, 3 SemanticMatches, 513 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4456 ImplicationChecksByTransitivity, 12.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3636occurred in iteration=18, InterpolantAutomatonStates: 281, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 19.1s InterpolantComputationTime, 1235 NumberOfCodeBlocks, 1223 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 1762 ConstructedInterpolants, 133 QuantifiedInterpolants, 20963 SizeOfPredicates, 114 NumberOfNonLiveVariables, 3185 ConjunctsInSsa, 328 ConjunctsInUnsatCore, 49 InterpolantComputations, 4 PerfectInterpolantSequences, 517/1632 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-29 06:49:36,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf31e1cb-ac0d-4a1d-b781-081fc5a54105/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE