./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/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_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/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_32f5d56a-8817-4062-a6f7-19de61251b3e/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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:31:33,910 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:31:33,976 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:31:33,980 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:31:33,980 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:31:34,005 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:31:34,006 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:31:34,007 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:31:34,007 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:31:34,008 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:31:34,008 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:31:34,009 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:31:34,010 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:31:34,010 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:31:34,011 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:31:34,011 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:31:34,012 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:31:34,012 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:31:34,013 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:31:34,013 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:31:34,014 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:31:34,014 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:31:34,015 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:31:34,015 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:31:34,016 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:31:34,016 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:31:34,017 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:31:34,017 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:31:34,018 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:31:34,018 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:31:34,018 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:31:34,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:31:34,019 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:31:34,019 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:31:34,020 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:31:34,020 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:31:34,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:31:34,031 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:31:34,032 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:31:34,032 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:31:34,032 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:31:34,033 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:31:34,033 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_32f5d56a-8817-4062-a6f7-19de61251b3e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2023-11-29 06:31:34,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:31:34,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:31:34,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:31:34,267 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:31:34,268 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:31:34,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-29 06:31:37,023 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:31:37,234 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:31:37,235 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2023-11-29 06:31:37,244 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/data/855cad48f/259bda71647c456da6574649b4db2598/FLAG218019d9b [2023-11-29 06:31:37,260 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/data/855cad48f/259bda71647c456da6574649b4db2598 [2023-11-29 06:31:37,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:31:37,264 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:31:37,265 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:31:37,266 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:31:37,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:31:37,271 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780ad196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37, skipping insertion in model container [2023-11-29 06:31:37,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,299 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:31:37,478 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_32f5d56a-8817-4062-a6f7-19de61251b3e/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2023-11-29 06:31:37,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:31:37,499 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:31:37,521 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_32f5d56a-8817-4062-a6f7-19de61251b3e/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2023-11-29 06:31:37,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:31:37,535 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:31:37,535 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:31:37,544 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:31:37,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37 WrapperNode [2023-11-29 06:31:37,544 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:31:37,545 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:31:37,545 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:31:37,546 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:31:37,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,561 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,587 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 161 [2023-11-29 06:31:37,587 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:31:37,588 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:31:37,588 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:31:37,588 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:31:37,599 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,603 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,619 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [4, 2, 2, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0, 0]. The 3 writes are split as follows [1, 0, 1, 1]. [2023-11-29 06:31:37,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,627 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,630 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,632 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,634 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,637 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:31:37,638 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:31:37,638 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:31:37,638 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:31:37,639 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (1/1) ... [2023-11-29 06:31:37,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:31:37,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:37,667 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:31:37,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:31:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:31:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:31:37,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:31:37,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:31:37,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:31:37,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:31:37,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:31:37,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:31:37,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:31:37,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:31:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:31:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:31:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:31:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:31:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:31:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:31:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:31:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:31:37,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:31:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:31:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:31:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:31:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:31:37,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:31:37,718 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 06:31:37,839 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:31:37,841 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:31:38,089 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:31:38,346 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:31:38,346 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:31:38,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:31:38 BoogieIcfgContainer [2023-11-29 06:31:38,347 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:31:38,350 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:31:38,350 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:31:38,353 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:31:38,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:31:37" (1/3) ... [2023-11-29 06:31:38,354 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42726966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:31:38, skipping insertion in model container [2023-11-29 06:31:38,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:37" (2/3) ... [2023-11-29 06:31:38,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42726966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:31:38, skipping insertion in model container [2023-11-29 06:31:38,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:31:38" (3/3) ... [2023-11-29 06:31:38,356 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-11-29 06:31:38,366 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:31:38,378 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:31:38,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:31:38,378 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:31:38,422 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 06:31:38,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2023-11-29 06:31:38,491 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-29 06:31:38,491 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:31:38,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 4/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-29 06:31:38,494 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2023-11-29 06:31:38,498 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 66 flow [2023-11-29 06:31:38,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:31:38,517 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;@777012a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:31:38,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 06:31:38,531 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:31:38,531 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2023-11-29 06:31:38,531 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:31:38,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:38,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:38,533 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 06:31:38,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1463790779, now seen corresponding path program 1 times [2023-11-29 06:31:38,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:38,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873862108] [2023-11-29 06:31:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:38,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:38,764 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 06:31:38,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:38,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873862108] [2023-11-29 06:31:38,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873862108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:38,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:31:38,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:31:38,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376010018] [2023-11-29 06:31:38,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:38,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:31:38,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:38,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:31:38,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:31:38,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 06:31:38,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 66 flow. Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:38,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:38,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 06:31:38,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:31:38,909 INFO L124 PetriNetUnfolderBase]: 90/194 cut-off events. [2023-11-29 06:31:38,909 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-29 06:31:38,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 194 events. 90/194 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 681 event pairs, 69 based on Foata normal form. 14/191 useless extension candidates. Maximal degree in co-relation 317. Up to 153 conditions per place. [2023-11-29 06:31:38,914 INFO L140 encePairwiseOnDemand]: 29/30 looper letters, 20 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-11-29 06:31:38,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 104 flow [2023-11-29 06:31:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:31:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-29 06:31:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 37 transitions. [2023-11-29 06:31:38,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2023-11-29 06:31:38,925 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 37 transitions. [2023-11-29 06:31:38,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 37 transitions. [2023-11-29 06:31:38,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:31:38,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 37 transitions. [2023-11-29 06:31:38,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 18.5) internal successors, (37), 2 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 06:31:38,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:38,934 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:38,936 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 66 flow. Second operand 2 states and 37 transitions. [2023-11-29 06:31:38,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 104 flow [2023-11-29 06:31:38,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 96 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:31:38,942 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 56 flow [2023-11-29 06:31:38,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-11-29 06:31:38,947 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-29 06:31:38,948 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 56 flow [2023-11-29 06:31:38,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:38,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:38,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:38,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:31:38,949 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 06:31:38,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:38,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1443539710, now seen corresponding path program 1 times [2023-11-29 06:31:38,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:38,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895532204] [2023-11-29 06:31:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:38,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:39,228 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 06:31:39,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:39,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895532204] [2023-11-29 06:31:39,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895532204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:39,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:31:39,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:31:39,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734694175] [2023-11-29 06:31:39,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:39,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:31:39,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:39,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:31:39,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:31:39,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 06:31:39,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:39,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:39,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 06:31:39,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:31:39,337 INFO L124 PetriNetUnfolderBase]: 103/234 cut-off events. [2023-11-29 06:31:39,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:31:39,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 234 events. 103/234 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 877 event pairs, 82 based on Foata normal form. 17/235 useless extension candidates. Maximal degree in co-relation 430. Up to 153 conditions per place. [2023-11-29 06:31:39,341 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 19 selfloop transitions, 2 changer transitions 8/35 dead transitions. [2023-11-29 06:31:39,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 134 flow [2023-11-29 06:31:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:31:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:31:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2023-11-29 06:31:39,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-29 06:31:39,343 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 64 transitions. [2023-11-29 06:31:39,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 64 transitions. [2023-11-29 06:31:39,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:31:39,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 64 transitions. [2023-11-29 06:31:39,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:39,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:39,346 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:39,347 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 56 flow. Second operand 4 states and 64 transitions. [2023-11-29 06:31:39,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 134 flow [2023-11-29 06:31:39,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:31:39,349 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 74 flow [2023-11-29 06:31:39,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, 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=74, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-29 06:31:39,350 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-29 06:31:39,350 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 74 flow [2023-11-29 06:31:39,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:39,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:39,351 INFO L208 CegarLoopForPetriNet]: trace histogram [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 06:31:39,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:31:39,351 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 06:31:39,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:39,352 INFO L85 PathProgramCache]: Analyzing trace with hash 727133890, now seen corresponding path program 1 times [2023-11-29 06:31:39,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:39,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476412988] [2023-11-29 06:31:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:39,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:31:39,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:39,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476412988] [2023-11-29 06:31:39,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476412988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:39,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:31:39,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:31:39,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359605081] [2023-11-29 06:31:39,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:39,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:31:39,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:39,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:31:39,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:31:39,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 06:31:39,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 74 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:39,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:39,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 06:31:39,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:31:39,865 INFO L124 PetriNetUnfolderBase]: 242/472 cut-off events. [2023-11-29 06:31:39,866 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-11-29 06:31:39,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 472 events. 242/472 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2147 event pairs, 67 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 1019. Up to 165 conditions per place. [2023-11-29 06:31:39,871 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 50 selfloop transitions, 9 changer transitions 8/71 dead transitions. [2023-11-29 06:31:39,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 71 transitions, 323 flow [2023-11-29 06:31:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:31:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:31:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2023-11-29 06:31:39,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-11-29 06:31:39,875 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 115 transitions. [2023-11-29 06:31:39,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 115 transitions. [2023-11-29 06:31:39,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:31:39,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 115 transitions. [2023-11-29 06:31:39,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:39,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 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 06:31:39,879 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 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 06:31:39,879 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 74 flow. Second operand 8 states and 115 transitions. [2023-11-29 06:31:39,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 71 transitions, 323 flow [2023-11-29 06:31:39,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 71 transitions, 319 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 06:31:39,882 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 128 flow [2023-11-29 06:31:39,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=128, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-11-29 06:31:39,884 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2023-11-29 06:31:39,884 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 128 flow [2023-11-29 06:31:39,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:39,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:39,885 INFO L208 CegarLoopForPetriNet]: trace histogram [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 06:31:39,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:31:39,885 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 06:31:39,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:39,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2026291322, now seen corresponding path program 2 times [2023-11-29 06:31:39,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:39,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549783080] [2023-11-29 06:31:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:39,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:31:39,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:39,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549783080] [2023-11-29 06:31:39,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549783080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:39,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:31:39,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:31:39,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421322702] [2023-11-29 06:31:39,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:39,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:31:39,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:39,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:31:39,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:31:39,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 06:31:39,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:39,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:39,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 06:31:39,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:31:40,041 INFO L124 PetriNetUnfolderBase]: 152/341 cut-off events. [2023-11-29 06:31:40,041 INFO L125 PetriNetUnfolderBase]: For 194/198 co-relation queries the response was YES. [2023-11-29 06:31:40,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 341 events. 152/341 cut-off events. For 194/198 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1426 event pairs, 43 based on Foata normal form. 6/340 useless extension candidates. Maximal degree in co-relation 854. Up to 229 conditions per place. [2023-11-29 06:31:40,045 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 27 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-11-29 06:31:40,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 201 flow [2023-11-29 06:31:40,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:31:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:31:40,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2023-11-29 06:31:40,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2023-11-29 06:31:40,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 52 transitions. [2023-11-29 06:31:40,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 52 transitions. [2023-11-29 06:31:40,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:31:40,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 52 transitions. [2023-11-29 06:31:40,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:40,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:40,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:40,049 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 128 flow. Second operand 3 states and 52 transitions. [2023-11-29 06:31:40,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 201 flow [2023-11-29 06:31:40,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 191 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-29 06:31:40,052 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 137 flow [2023-11-29 06:31:40,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-11-29 06:31:40,054 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-11-29 06:31:40,054 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 137 flow [2023-11-29 06:31:40,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:40,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:40,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 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 06:31:40,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:31:40,055 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 06:31:40,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:40,056 INFO L85 PathProgramCache]: Analyzing trace with hash -278422058, now seen corresponding path program 1 times [2023-11-29 06:31:40,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:40,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488502421] [2023-11-29 06:31:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:40,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:40,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:40,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488502421] [2023-11-29 06:31:40,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488502421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:40,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401072645] [2023-11-29 06:31:40,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:40,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:40,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:40,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:40,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:31:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:40,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:31:40,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:40,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:40,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401072645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:40,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:31:40,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 06:31:40,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486263980] [2023-11-29 06:31:40,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:40,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:31:40,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:40,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:31:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:31:40,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 06:31:40,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 137 flow. Second operand has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:40,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:40,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 06:31:40,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:31:40,718 INFO L124 PetriNetUnfolderBase]: 258/589 cut-off events. [2023-11-29 06:31:40,718 INFO L125 PetriNetUnfolderBase]: For 609/651 co-relation queries the response was YES. [2023-11-29 06:31:40,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1591 conditions, 589 events. 258/589 cut-off events. For 609/651 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3024 event pairs, 146 based on Foata normal form. 27/585 useless extension candidates. Maximal degree in co-relation 1581. Up to 279 conditions per place. [2023-11-29 06:31:40,723 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 43 selfloop transitions, 5 changer transitions 4/61 dead transitions. [2023-11-29 06:31:40,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 335 flow [2023-11-29 06:31:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:31:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:31:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2023-11-29 06:31:40,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-29 06:31:40,725 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 95 transitions. [2023-11-29 06:31:40,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 95 transitions. [2023-11-29 06:31:40,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:31:40,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 95 transitions. [2023-11-29 06:31:40,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:40,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:40,727 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:40,728 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 137 flow. Second operand 6 states and 95 transitions. [2023-11-29 06:31:40,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 335 flow [2023-11-29 06:31:40,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 314 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-29 06:31:40,732 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 165 flow [2023-11-29 06:31:40,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=165, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-11-29 06:31:40,733 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2023-11-29 06:31:40,733 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 165 flow [2023-11-29 06:31:40,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:40,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:40,734 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, 1, 1, 1, 1] [2023-11-29 06:31:40,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:31:40,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:40,935 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 06:31:40,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:40,936 INFO L85 PathProgramCache]: Analyzing trace with hash -443217620, now seen corresponding path program 2 times [2023-11-29 06:31:40,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:40,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824478587] [2023-11-29 06:31:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:40,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:41,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:41,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824478587] [2023-11-29 06:31:41,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824478587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:41,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182351480] [2023-11-29 06:31:41,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:31:41,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:41,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:41,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:41,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:31:41,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:31:41,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:31:41,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:31:41,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:41,968 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 12 treesize of output 3 [2023-11-29 06:31:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:42,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:42,243 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:31:42,243 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 12 [2023-11-29 06:31:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:42,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182351480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:42,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:31:42,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2023-11-29 06:31:42,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211679369] [2023-11-29 06:31:42,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:42,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:31:42,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:42,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:31:42,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:31:42,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 06:31:42,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 165 flow. Second operand has 22 states, 22 states have (on average 8.545454545454545) internal successors, (188), 22 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:42,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:42,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 06:31:42,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:31:44,025 INFO L124 PetriNetUnfolderBase]: 784/1685 cut-off events. [2023-11-29 06:31:44,025 INFO L125 PetriNetUnfolderBase]: For 1160/1164 co-relation queries the response was YES. [2023-11-29 06:31:44,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4252 conditions, 1685 events. 784/1685 cut-off events. For 1160/1164 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10240 event pairs, 59 based on Foata normal form. 80/1759 useless extension candidates. Maximal degree in co-relation 4240. Up to 295 conditions per place. [2023-11-29 06:31:44,041 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 171 selfloop transitions, 42 changer transitions 16/236 dead transitions. [2023-11-29 06:31:44,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 236 transitions, 1292 flow [2023-11-29 06:31:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:31:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 06:31:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 407 transitions. [2023-11-29 06:31:44,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845238095238095 [2023-11-29 06:31:44,045 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 407 transitions. [2023-11-29 06:31:44,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 407 transitions. [2023-11-29 06:31:44,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:31:44,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 407 transitions. [2023-11-29 06:31:44,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 14.535714285714286) internal successors, (407), 28 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:44,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 30.0) internal successors, (870), 29 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:44,052 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 30.0) internal successors, (870), 29 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:44,052 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 165 flow. Second operand 28 states and 407 transitions. [2023-11-29 06:31:44,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 236 transitions, 1292 flow [2023-11-29 06:31:44,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 236 transitions, 1241 flow, removed 23 selfloop flow, removed 3 redundant places. [2023-11-29 06:31:44,062 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 535 flow [2023-11-29 06:31:44,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=535, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2023-11-29 06:31:44,064 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2023-11-29 06:31:44,064 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 535 flow [2023-11-29 06:31:44,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.545454545454545) internal successors, (188), 22 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:44,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:44,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:44,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:31:44,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:31:44,270 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 06:31:44,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:44,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1422724300, now seen corresponding path program 1 times [2023-11-29 06:31:44,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:44,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137812451] [2023-11-29 06:31:44,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:44,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:44,447 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 06:31:44,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:44,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137812451] [2023-11-29 06:31:44,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137812451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:44,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138123264] [2023-11-29 06:31:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:44,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:44,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:44,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:44,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:31:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:44,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:31:44,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:31:44,590 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:31:44,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138123264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:31:44,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:31:44,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-29 06:31:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948113624] [2023-11-29 06:31:44,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:31:44,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:31:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:31:44,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:31:44,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 06:31:44,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 535 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:44,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:44,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 06:31:44,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:31:44,903 INFO L124 PetriNetUnfolderBase]: 624/1600 cut-off events. [2023-11-29 06:31:44,903 INFO L125 PetriNetUnfolderBase]: For 6445/6520 co-relation queries the response was YES. [2023-11-29 06:31:44,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5169 conditions, 1600 events. 624/1600 cut-off events. For 6445/6520 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10958 event pairs, 162 based on Foata normal form. 42/1605 useless extension candidates. Maximal degree in co-relation 5145. Up to 647 conditions per place. [2023-11-29 06:31:44,918 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 66 selfloop transitions, 15 changer transitions 9/107 dead transitions. [2023-11-29 06:31:44,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 107 transitions, 882 flow [2023-11-29 06:31:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:31:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:31:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2023-11-29 06:31:44,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2023-11-29 06:31:44,919 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 82 transitions. [2023-11-29 06:31:44,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 82 transitions. [2023-11-29 06:31:44,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:31:44,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 82 transitions. [2023-11-29 06:31:44,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:44,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:44,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:44,921 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 535 flow. Second operand 4 states and 82 transitions. [2023-11-29 06:31:44,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 107 transitions, 882 flow [2023-11-29 06:31:44,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 107 transitions, 746 flow, removed 60 selfloop flow, removed 7 redundant places. [2023-11-29 06:31:44,949 INFO L231 Difference]: Finished difference. Result has 80 places, 73 transitions, 510 flow [2023-11-29 06:31:44,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=510, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2023-11-29 06:31:44,950 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2023-11-29 06:31:44,951 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 510 flow [2023-11-29 06:31:44,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:44,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:44,951 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, 1, 1, 1, 1] [2023-11-29 06:31:44,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:31:45,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 06:31:45,152 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 06:31:45,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1941903008, now seen corresponding path program 3 times [2023-11-29 06:31:45,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:45,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705441077] [2023-11-29 06:31:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:45,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:45,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:45,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705441077] [2023-11-29 06:31:45,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705441077] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:45,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456047251] [2023-11-29 06:31:45,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:31:45,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:45,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:45,688 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:45,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:31:45,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:31:45,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:31:45,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:31:45,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:46,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:46,219 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:31:46,219 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 12 [2023-11-29 06:31:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:46,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456047251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:46,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:31:46,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 06:31:46,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529692840] [2023-11-29 06:31:46,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:46,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:31:46,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:46,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:31:46,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:31:46,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 06:31:46,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 510 flow. Second operand has 22 states, 22 states have (on average 8.5) internal successors, (187), 22 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:46,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:46,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 06:31:46,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:31:47,978 INFO L124 PetriNetUnfolderBase]: 1260/2617 cut-off events. [2023-11-29 06:31:47,978 INFO L125 PetriNetUnfolderBase]: For 14205/14205 co-relation queries the response was YES. [2023-11-29 06:31:47,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9324 conditions, 2617 events. 1260/2617 cut-off events. For 14205/14205 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16946 event pairs, 126 based on Foata normal form. 102/2696 useless extension candidates. Maximal degree in co-relation 9302. Up to 558 conditions per place. [2023-11-29 06:31:47,998 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 153 selfloop transitions, 65 changer transitions 1/225 dead transitions. [2023-11-29 06:31:47,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 225 transitions, 2009 flow [2023-11-29 06:31:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:31:47,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 06:31:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 292 transitions. [2023-11-29 06:31:48,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2023-11-29 06:31:48,000 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 292 transitions. [2023-11-29 06:31:48,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 292 transitions. [2023-11-29 06:31:48,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:31:48,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 292 transitions. [2023-11-29 06:31:48,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 14.6) internal successors, (292), 20 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:48,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:48,004 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 30.0) internal successors, (630), 21 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:48,004 INFO L175 Difference]: Start difference. First operand has 80 places, 73 transitions, 510 flow. Second operand 20 states and 292 transitions. [2023-11-29 06:31:48,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 225 transitions, 2009 flow [2023-11-29 06:31:48,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 225 transitions, 1761 flow, removed 124 selfloop flow, removed 3 redundant places. [2023-11-29 06:31:48,028 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 1081 flow [2023-11-29 06:31:48,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1081, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2023-11-29 06:31:48,029 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 71 predicate places. [2023-11-29 06:31:48,029 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 1081 flow [2023-11-29 06:31:48,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.5) internal successors, (187), 22 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:48,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:48,030 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 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 06:31:48,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:31:48,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:48,231 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 06:31:48,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:48,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1248995018, now seen corresponding path program 4 times [2023-11-29 06:31:48,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:48,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826402063] [2023-11-29 06:31:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:48,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:48,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:48,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826402063] [2023-11-29 06:31:48,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826402063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:48,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224593535] [2023-11-29 06:31:48,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:31:48,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:48,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:48,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:48,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:31:49,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:31:49,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:31:49,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:31:49,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:31:49,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:49,200 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:31:49,200 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 12 [2023-11-29 06:31:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:31:49,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224593535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:49,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:31:49,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 15 [2023-11-29 06:31:49,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361049279] [2023-11-29 06:31:49,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:49,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:31:49,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:49,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:31:49,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:31:49,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 06:31:49,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 1081 flow. Second operand has 16 states, 16 states have (on average 8.875) internal successors, (142), 16 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:49,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:49,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 06:31:49,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:31:50,064 INFO L124 PetriNetUnfolderBase]: 1432/2993 cut-off events. [2023-11-29 06:31:50,065 INFO L125 PetriNetUnfolderBase]: For 24975/24975 co-relation queries the response was YES. [2023-11-29 06:31:50,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12400 conditions, 2993 events. 1432/2993 cut-off events. For 24975/24975 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 19793 event pairs, 185 based on Foata normal form. 60/3050 useless extension candidates. Maximal degree in co-relation 12370. Up to 1001 conditions per place. [2023-11-29 06:31:50,102 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 130 selfloop transitions, 55 changer transitions 0/191 dead transitions. [2023-11-29 06:31:50,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 191 transitions, 2195 flow [2023-11-29 06:31:50,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:31:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 06:31:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 169 transitions. [2023-11-29 06:31:50,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-29 06:31:50,104 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 169 transitions. [2023-11-29 06:31:50,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 169 transitions. [2023-11-29 06:31:50,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:31:50,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 169 transitions. [2023-11-29 06:31:50,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 13.0) internal successors, (169), 13 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:50,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:50,108 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:50,108 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 1081 flow. Second operand 13 states and 169 transitions. [2023-11-29 06:31:50,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 191 transitions, 2195 flow [2023-11-29 06:31:50,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 191 transitions, 1945 flow, removed 115 selfloop flow, removed 8 redundant places. [2023-11-29 06:31:50,199 INFO L231 Difference]: Finished difference. Result has 105 places, 118 transitions, 1164 flow [2023-11-29 06:31:50,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1164, PETRI_PLACES=105, PETRI_TRANSITIONS=118} [2023-11-29 06:31:50,200 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 75 predicate places. [2023-11-29 06:31:50,200 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 118 transitions, 1164 flow [2023-11-29 06:31:50,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.875) internal successors, (142), 16 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:50,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:50,201 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 06:31:50,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:31:50,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:50,402 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 06:31:50,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:50,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1382815448, now seen corresponding path program 1 times [2023-11-29 06:31:50,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:50,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68461752] [2023-11-29 06:31:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:50,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:51,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68461752] [2023-11-29 06:31:51,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68461752] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847941908] [2023-11-29 06:31:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:51,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:51,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:51,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:51,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:31:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:51,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 06:31:51,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:51,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:52,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:31:52,356 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 26 treesize of output 18 [2023-11-29 06:31:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:52,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847941908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:52,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:31:52,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2023-11-29 06:31:52,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116535963] [2023-11-29 06:31:52,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:52,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 06:31:52,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:52,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 06:31:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1522, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 06:31:52,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:31:52,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 118 transitions, 1164 flow. Second operand has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:52,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:52,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:31:52,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:31:57,303 INFO L124 PetriNetUnfolderBase]: 3400/6418 cut-off events. [2023-11-29 06:31:57,303 INFO L125 PetriNetUnfolderBase]: For 48164/48164 co-relation queries the response was YES. [2023-11-29 06:31:57,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26260 conditions, 6418 events. 3400/6418 cut-off events. For 48164/48164 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 42872 event pairs, 299 based on Foata normal form. 6/6424 useless extension candidates. Maximal degree in co-relation 26230. Up to 2370 conditions per place. [2023-11-29 06:31:57,345 INFO L140 encePairwiseOnDemand]: 16/30 looper letters, 302 selfloop transitions, 158 changer transitions 52/514 dead transitions. [2023-11-29 06:31:57,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 514 transitions, 4965 flow [2023-11-29 06:31:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 06:31:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-29 06:31:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 528 transitions. [2023-11-29 06:31:57,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34509803921568627 [2023-11-29 06:31:57,349 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 528 transitions. [2023-11-29 06:31:57,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 528 transitions. [2023-11-29 06:31:57,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:31:57,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 528 transitions. [2023-11-29 06:31:57,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 10.352941176470589) internal successors, (528), 51 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:57,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 30.0) internal successors, (1560), 52 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:57,356 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 30.0) internal successors, (1560), 52 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:57,356 INFO L175 Difference]: Start difference. First operand has 105 places, 118 transitions, 1164 flow. Second operand 51 states and 528 transitions. [2023-11-29 06:31:57,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 514 transitions, 4965 flow [2023-11-29 06:31:57,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 514 transitions, 4933 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-29 06:31:57,464 INFO L231 Difference]: Finished difference. Result has 167 places, 243 transitions, 2892 flow [2023-11-29 06:31:57,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=2892, PETRI_PLACES=167, PETRI_TRANSITIONS=243} [2023-11-29 06:31:57,465 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2023-11-29 06:31:57,465 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 243 transitions, 2892 flow [2023-11-29 06:31:57,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:57,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:31:57,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 06:31:57,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 06:31:57,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:31:57,666 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 06:31:57,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash 74639994, now seen corresponding path program 2 times [2023-11-29 06:31:57,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:57,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152830377] [2023-11-29 06:31:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:57,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:58,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:58,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152830377] [2023-11-29 06:31:58,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152830377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:31:58,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55555750] [2023-11-29 06:31:58,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:31:58,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:58,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:58,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:58,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:31:58,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:31:58,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:31:58,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 06:31:58,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:58,817 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 11 treesize of output 3 [2023-11-29 06:31:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:59,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:59,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:31:59,272 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 26 treesize of output 18 [2023-11-29 06:31:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:31:59,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55555750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:59,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:31:59,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2023-11-29 06:31:59,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939847125] [2023-11-29 06:31:59,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:59,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 06:31:59,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:59,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 06:31:59,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 06:31:59,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:31:59,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 243 transitions, 2892 flow. Second operand has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:31:59,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:31:59,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:31:59,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:04,963 INFO L124 PetriNetUnfolderBase]: 3869/7397 cut-off events. [2023-11-29 06:32:04,963 INFO L125 PetriNetUnfolderBase]: For 72157/72157 co-relation queries the response was YES. [2023-11-29 06:32:04,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35821 conditions, 7397 events. 3869/7397 cut-off events. For 72157/72157 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 51743 event pairs, 379 based on Foata normal form. 4/7401 useless extension candidates. Maximal degree in co-relation 35774. Up to 3212 conditions per place. [2023-11-29 06:32:05,011 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 243 selfloop transitions, 371 changer transitions 58/674 dead transitions. [2023-11-29 06:32:05,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 674 transitions, 7853 flow [2023-11-29 06:32:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 06:32:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-11-29 06:32:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 589 transitions. [2023-11-29 06:32:05,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32722222222222225 [2023-11-29 06:32:05,015 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 589 transitions. [2023-11-29 06:32:05,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 589 transitions. [2023-11-29 06:32:05,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:05,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 589 transitions. [2023-11-29 06:32:05,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 9.816666666666666) internal successors, (589), 60 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:05,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 30.0) internal successors, (1830), 61 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:05,023 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 30.0) internal successors, (1830), 61 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:05,023 INFO L175 Difference]: Start difference. First operand has 167 places, 243 transitions, 2892 flow. Second operand 60 states and 589 transitions. [2023-11-29 06:32:05,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 674 transitions, 7853 flow [2023-11-29 06:32:05,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 674 transitions, 7727 flow, removed 48 selfloop flow, removed 9 redundant places. [2023-11-29 06:32:05,225 INFO L231 Difference]: Finished difference. Result has 236 places, 454 transitions, 6607 flow [2023-11-29 06:32:05,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=6607, PETRI_PLACES=236, PETRI_TRANSITIONS=454} [2023-11-29 06:32:05,226 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 206 predicate places. [2023-11-29 06:32:05,226 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 454 transitions, 6607 flow [2023-11-29 06:32:05,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:05,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:05,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 06:32:05,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:32:05,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:05,427 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 06:32:05,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:05,428 INFO L85 PathProgramCache]: Analyzing trace with hash 674662682, now seen corresponding path program 3 times [2023-11-29 06:32:05,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:05,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885800516] [2023-11-29 06:32:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:05,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:06,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:06,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885800516] [2023-11-29 06:32:06,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885800516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144857013] [2023-11-29 06:32:06,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:32:06,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:06,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:06,307 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:06,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:32:06,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:32:06,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:32:06,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 06:32:06,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:06,848 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 11 treesize of output 3 [2023-11-29 06:32:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:07,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:07,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:07,263 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 26 treesize of output 18 [2023-11-29 06:32:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:07,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144857013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:07,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:07,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2023-11-29 06:32:07,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141588270] [2023-11-29 06:32:07,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:07,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 06:32:07,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:07,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 06:32:07,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 06:32:07,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:32:07,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 454 transitions, 6607 flow. Second operand has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:07,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:07,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:32:07,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:12,865 INFO L124 PetriNetUnfolderBase]: 4232/8080 cut-off events. [2023-11-29 06:32:12,865 INFO L125 PetriNetUnfolderBase]: For 126098/126098 co-relation queries the response was YES. [2023-11-29 06:32:12,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49107 conditions, 8080 events. 4232/8080 cut-off events. For 126098/126098 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 57549 event pairs, 365 based on Foata normal form. 4/8084 useless extension candidates. Maximal degree in co-relation 49036. Up to 2841 conditions per place. [2023-11-29 06:32:12,943 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 276 selfloop transitions, 499 changer transitions 57/834 dead transitions. [2023-11-29 06:32:12,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 834 transitions, 12926 flow [2023-11-29 06:32:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 06:32:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-11-29 06:32:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 567 transitions. [2023-11-29 06:32:12,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.315 [2023-11-29 06:32:12,947 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 567 transitions. [2023-11-29 06:32:12,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 567 transitions. [2023-11-29 06:32:12,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:12,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 567 transitions. [2023-11-29 06:32:12,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 9.45) internal successors, (567), 60 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 30.0) internal successors, (1830), 61 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,954 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 30.0) internal successors, (1830), 61 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:12,954 INFO L175 Difference]: Start difference. First operand has 236 places, 454 transitions, 6607 flow. Second operand 60 states and 567 transitions. [2023-11-29 06:32:12,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 834 transitions, 12926 flow [2023-11-29 06:32:13,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 834 transitions, 12431 flow, removed 203 selfloop flow, removed 24 redundant places. [2023-11-29 06:32:13,565 INFO L231 Difference]: Finished difference. Result has 276 places, 626 transitions, 10745 flow [2023-11-29 06:32:13,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=6228, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=10745, PETRI_PLACES=276, PETRI_TRANSITIONS=626} [2023-11-29 06:32:13,567 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2023-11-29 06:32:13,567 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 626 transitions, 10745 flow [2023-11-29 06:32:13,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.857142857142857) internal successors, (246), 42 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:13,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:13,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 06:32:13,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:32:13,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:13,768 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 06:32:13,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1630702200, now seen corresponding path program 4 times [2023-11-29 06:32:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:13,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86714454] [2023-11-29 06:32:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:14,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:14,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86714454] [2023-11-29 06:32:14,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86714454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:14,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688579570] [2023-11-29 06:32:14,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:32:14,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:14,543 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:14,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:32:14,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:32:14,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:32:14,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 06:32:14,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:14,970 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 12 treesize of output 3 [2023-11-29 06:32:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:15,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:15,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:15,442 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 26 treesize of output 18 [2023-11-29 06:32:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:15,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688579570] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:15,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:15,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2023-11-29 06:32:15,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112801023] [2023-11-29 06:32:15,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:15,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 06:32:15,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:15,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 06:32:15,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 06:32:15,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:32:15,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 626 transitions, 10745 flow. Second operand has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:15,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:15,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:32:15,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:19,931 INFO L124 PetriNetUnfolderBase]: 4271/8154 cut-off events. [2023-11-29 06:32:19,932 INFO L125 PetriNetUnfolderBase]: For 146967/146967 co-relation queries the response was YES. [2023-11-29 06:32:19,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54376 conditions, 8154 events. 4271/8154 cut-off events. For 146967/146967 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 58291 event pairs, 496 based on Foata normal form. 4/8156 useless extension candidates. Maximal degree in co-relation 54300. Up to 4099 conditions per place. [2023-11-29 06:32:20,001 INFO L140 encePairwiseOnDemand]: 16/30 looper letters, 323 selfloop transitions, 406 changer transitions 51/782 dead transitions. [2023-11-29 06:32:20,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 782 transitions, 13825 flow [2023-11-29 06:32:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 06:32:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 06:32:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 349 transitions. [2023-11-29 06:32:20,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3144144144144144 [2023-11-29 06:32:20,003 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 349 transitions. [2023-11-29 06:32:20,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 349 transitions. [2023-11-29 06:32:20,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:20,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 349 transitions. [2023-11-29 06:32:20,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 9.432432432432432) internal successors, (349), 37 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:20,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 30.0) internal successors, (1140), 38 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:20,007 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 30.0) internal successors, (1140), 38 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:20,007 INFO L175 Difference]: Start difference. First operand has 276 places, 626 transitions, 10745 flow. Second operand 37 states and 349 transitions. [2023-11-29 06:32:20,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 782 transitions, 13825 flow [2023-11-29 06:32:20,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 782 transitions, 13259 flow, removed 222 selfloop flow, removed 33 redundant places. [2023-11-29 06:32:20,890 INFO L231 Difference]: Finished difference. Result has 278 places, 647 transitions, 12173 flow [2023-11-29 06:32:20,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=10231, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=12173, PETRI_PLACES=278, PETRI_TRANSITIONS=647} [2023-11-29 06:32:20,891 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 248 predicate places. [2023-11-29 06:32:20,891 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 647 transitions, 12173 flow [2023-11-29 06:32:20,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:20,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:20,892 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 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 06:32:20,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:32:21,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:32:21,092 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 06:32:21,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:21,093 INFO L85 PathProgramCache]: Analyzing trace with hash -786447800, now seen corresponding path program 5 times [2023-11-29 06:32:21,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:21,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773462302] [2023-11-29 06:32:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:21,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:22,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:22,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773462302] [2023-11-29 06:32:22,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773462302] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:22,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749748335] [2023-11-29 06:32:22,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:32:22,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:22,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:22,412 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:22,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:32:22,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:32:22,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:32:22,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:32:22,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:32:22,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:23,003 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:23,003 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 26 treesize of output 18 [2023-11-29 06:32:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:32:23,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749748335] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:23,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:23,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 34 [2023-11-29 06:32:23,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611680050] [2023-11-29 06:32:23,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:23,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 06:32:23,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 06:32:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 06:32:23,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:32:23,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 647 transitions, 12173 flow. Second operand has 35 states, 35 states have (on average 5.9714285714285715) internal successors, (209), 35 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:23,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:23,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:32:23,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:26,348 INFO L124 PetriNetUnfolderBase]: 4325/8202 cut-off events. [2023-11-29 06:32:26,348 INFO L125 PetriNetUnfolderBase]: For 159068/159068 co-relation queries the response was YES. [2023-11-29 06:32:26,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57526 conditions, 8202 events. 4325/8202 cut-off events. For 159068/159068 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 58730 event pairs, 509 based on Foata normal form. 1/8203 useless extension candidates. Maximal degree in co-relation 57450. Up to 3703 conditions per place. [2023-11-29 06:32:26,437 INFO L140 encePairwiseOnDemand]: 17/30 looper letters, 405 selfloop transitions, 398 changer transitions 26/831 dead transitions. [2023-11-29 06:32:26,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 831 transitions, 15876 flow [2023-11-29 06:32:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:32:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 06:32:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 295 transitions. [2023-11-29 06:32:26,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2023-11-29 06:32:26,438 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 295 transitions. [2023-11-29 06:32:26,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 295 transitions. [2023-11-29 06:32:26,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:26,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 295 transitions. [2023-11-29 06:32:26,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 10.535714285714286) internal successors, (295), 28 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:26,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 30.0) internal successors, (870), 29 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:26,441 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 30.0) internal successors, (870), 29 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:26,441 INFO L175 Difference]: Start difference. First operand has 278 places, 647 transitions, 12173 flow. Second operand 28 states and 295 transitions. [2023-11-29 06:32:26,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 831 transitions, 15876 flow [2023-11-29 06:32:27,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 831 transitions, 15291 flow, removed 77 selfloop flow, removed 23 redundant places. [2023-11-29 06:32:27,377 INFO L231 Difference]: Finished difference. Result has 276 places, 678 transitions, 13391 flow [2023-11-29 06:32:27,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=11676, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=13391, PETRI_PLACES=276, PETRI_TRANSITIONS=678} [2023-11-29 06:32:27,378 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2023-11-29 06:32:27,379 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 678 transitions, 13391 flow [2023-11-29 06:32:27,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.9714285714285715) internal successors, (209), 35 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:27,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:27,379 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 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 06:32:27,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 06:32:27,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:32:27,580 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 06:32:27,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:27,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1715431360, now seen corresponding path program 6 times [2023-11-29 06:32:27,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:27,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576366619] [2023-11-29 06:32:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:27,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:28,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:28,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576366619] [2023-11-29 06:32:28,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576366619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:28,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052175942] [2023-11-29 06:32:28,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:32:28,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:28,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:28,591 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:28,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:32:28,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:32:28,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:32:28,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 06:32:28,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:32:29,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:29,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:29,314 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 37 treesize of output 21 [2023-11-29 06:32:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:32:29,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052175942] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:29,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:29,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 11] total 37 [2023-11-29 06:32:29,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961277383] [2023-11-29 06:32:29,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:29,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 06:32:29,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:29,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 06:32:29,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 06:32:29,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:32:29,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 678 transitions, 13391 flow. Second operand has 38 states, 38 states have (on average 5.815789473684211) internal successors, (221), 38 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:29,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:29,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:32:29,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:33,456 INFO L124 PetriNetUnfolderBase]: 4277/8094 cut-off events. [2023-11-29 06:32:33,456 INFO L125 PetriNetUnfolderBase]: For 171632/171632 co-relation queries the response was YES. [2023-11-29 06:32:33,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58660 conditions, 8094 events. 4277/8094 cut-off events. For 171632/171632 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 57105 event pairs, 355 based on Foata normal form. 1/8095 useless extension candidates. Maximal degree in co-relation 58582. Up to 2839 conditions per place. [2023-11-29 06:32:33,609 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 352 selfloop transitions, 475 changer transitions 53/882 dead transitions. [2023-11-29 06:32:33,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 882 transitions, 17120 flow [2023-11-29 06:32:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 06:32:33,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-29 06:32:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 385 transitions. [2023-11-29 06:32:33,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33771929824561403 [2023-11-29 06:32:33,611 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 385 transitions. [2023-11-29 06:32:33,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 385 transitions. [2023-11-29 06:32:33,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:33,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 385 transitions. [2023-11-29 06:32:33,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 10.131578947368421) internal successors, (385), 38 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:33,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 30.0) internal successors, (1170), 39 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:33,614 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 30.0) internal successors, (1170), 39 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:33,614 INFO L175 Difference]: Start difference. First operand has 276 places, 678 transitions, 13391 flow. Second operand 38 states and 385 transitions. [2023-11-29 06:32:33,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 882 transitions, 17120 flow [2023-11-29 06:32:34,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 882 transitions, 17016 flow, removed 36 selfloop flow, removed 11 redundant places. [2023-11-29 06:32:34,452 INFO L231 Difference]: Finished difference. Result has 306 places, 703 transitions, 14614 flow [2023-11-29 06:32:34,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=13307, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=14614, PETRI_PLACES=306, PETRI_TRANSITIONS=703} [2023-11-29 06:32:34,453 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2023-11-29 06:32:34,453 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 703 transitions, 14614 flow [2023-11-29 06:32:34,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.815789473684211) internal successors, (221), 38 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:34,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:34,453 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 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 06:32:34,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:32:34,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:32:34,654 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 06:32:34,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:34,654 INFO L85 PathProgramCache]: Analyzing trace with hash 126839252, now seen corresponding path program 7 times [2023-11-29 06:32:34,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:34,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666883805] [2023-11-29 06:32:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:35,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:35,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666883805] [2023-11-29 06:32:35,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666883805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:35,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97303516] [2023-11-29 06:32:35,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:32:35,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:35,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:35,822 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:35,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:32:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:35,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 06:32:35,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:32:36,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:36,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:36,364 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 26 treesize of output 18 [2023-11-29 06:32:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:32:36,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97303516] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:36,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:36,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2023-11-29 06:32:36,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436802004] [2023-11-29 06:32:36,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:36,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 06:32:36,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:36,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 06:32:36,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 06:32:36,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:32:36,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 703 transitions, 14614 flow. Second operand has 36 states, 36 states have (on average 5.916666666666667) internal successors, (213), 36 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:36,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:36,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:32:36,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:40,078 INFO L124 PetriNetUnfolderBase]: 4705/8890 cut-off events. [2023-11-29 06:32:40,078 INFO L125 PetriNetUnfolderBase]: For 204412/204412 co-relation queries the response was YES. [2023-11-29 06:32:40,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67016 conditions, 8890 events. 4705/8890 cut-off events. For 204412/204412 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 63971 event pairs, 497 based on Foata normal form. 1/8891 useless extension candidates. Maximal degree in co-relation 66937. Up to 3894 conditions per place. [2023-11-29 06:32:40,160 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 382 selfloop transitions, 559 changer transitions 40/983 dead transitions. [2023-11-29 06:32:40,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 983 transitions, 20875 flow [2023-11-29 06:32:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 06:32:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-29 06:32:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 343 transitions. [2023-11-29 06:32:40,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3175925925925926 [2023-11-29 06:32:40,162 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 343 transitions. [2023-11-29 06:32:40,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 343 transitions. [2023-11-29 06:32:40,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:40,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 343 transitions. [2023-11-29 06:32:40,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 9.527777777777779) internal successors, (343), 36 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:40,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 30.0) internal successors, (1110), 37 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:40,166 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 30.0) internal successors, (1110), 37 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:40,166 INFO L175 Difference]: Start difference. First operand has 306 places, 703 transitions, 14614 flow. Second operand 36 states and 343 transitions. [2023-11-29 06:32:40,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 983 transitions, 20875 flow [2023-11-29 06:32:41,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 983 transitions, 20485 flow, removed 38 selfloop flow, removed 18 redundant places. [2023-11-29 06:32:41,411 INFO L231 Difference]: Finished difference. Result has 329 places, 825 transitions, 18947 flow [2023-11-29 06:32:41,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=14274, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=18947, PETRI_PLACES=329, PETRI_TRANSITIONS=825} [2023-11-29 06:32:41,412 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 299 predicate places. [2023-11-29 06:32:41,412 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 825 transitions, 18947 flow [2023-11-29 06:32:41,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.916666666666667) internal successors, (213), 36 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:41,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:41,413 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 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 06:32:41,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:32:41,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:32:41,614 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 06:32:41,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2119843784, now seen corresponding path program 8 times [2023-11-29 06:32:41,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:41,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561022254] [2023-11-29 06:32:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:41,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:42,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:42,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561022254] [2023-11-29 06:32:42,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561022254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:42,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012948609] [2023-11-29 06:32:42,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:32:42,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:42,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:42,723 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:42,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:32:42,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:32:42,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:32:42,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 06:32:42,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:32:43,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:43,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:32:43,387 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 26 treesize of output 18 [2023-11-29 06:32:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:32:43,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012948609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:43,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:43,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2023-11-29 06:32:43,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100061980] [2023-11-29 06:32:43,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:43,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 06:32:43,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:43,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 06:32:43,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 06:32:43,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:32:43,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 825 transitions, 18947 flow. Second operand has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:43,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:43,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:32:43,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:47,313 INFO L124 PetriNetUnfolderBase]: 4659/8812 cut-off events. [2023-11-29 06:32:47,313 INFO L125 PetriNetUnfolderBase]: For 246493/246493 co-relation queries the response was YES. [2023-11-29 06:32:47,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72420 conditions, 8812 events. 4659/8812 cut-off events. For 246493/246493 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 63246 event pairs, 515 based on Foata normal form. 1/8813 useless extension candidates. Maximal degree in co-relation 72330. Up to 4855 conditions per place. [2023-11-29 06:32:47,401 INFO L140 encePairwiseOnDemand]: 15/30 looper letters, 380 selfloop transitions, 501 changer transitions 47/930 dead transitions. [2023-11-29 06:32:47,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 930 transitions, 21686 flow [2023-11-29 06:32:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:32:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 06:32:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 276 transitions. [2023-11-29 06:32:47,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32857142857142857 [2023-11-29 06:32:47,403 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 276 transitions. [2023-11-29 06:32:47,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 276 transitions. [2023-11-29 06:32:47,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:47,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 276 transitions. [2023-11-29 06:32:47,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 9.857142857142858) internal successors, (276), 28 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:47,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 30.0) internal successors, (870), 29 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:47,405 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 30.0) internal successors, (870), 29 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:47,405 INFO L175 Difference]: Start difference. First operand has 329 places, 825 transitions, 18947 flow. Second operand 28 states and 276 transitions. [2023-11-29 06:32:47,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 930 transitions, 21686 flow [2023-11-29 06:32:48,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 930 transitions, 21512 flow, removed 65 selfloop flow, removed 16 redundant places. [2023-11-29 06:32:48,767 INFO L231 Difference]: Finished difference. Result has 337 places, 821 transitions, 19731 flow [2023-11-29 06:32:48,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=18783, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=499, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=19731, PETRI_PLACES=337, PETRI_TRANSITIONS=821} [2023-11-29 06:32:48,768 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 307 predicate places. [2023-11-29 06:32:48,768 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 821 transitions, 19731 flow [2023-11-29 06:32:48,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:48,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:48,768 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 06:32:48,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 06:32:48,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:32:48,969 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 06:32:48,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:48,969 INFO L85 PathProgramCache]: Analyzing trace with hash -615405534, now seen corresponding path program 9 times [2023-11-29 06:32:48,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:48,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671266832] [2023-11-29 06:32:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:48,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:32:49,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:49,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671266832] [2023-11-29 06:32:49,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671266832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:49,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28220161] [2023-11-29 06:32:49,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:32:49,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:49,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:49,181 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:49,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:32:49,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:32:49,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:32:49,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:32:49,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:32:49,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:32:49,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28220161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:49,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:49,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2023-11-29 06:32:49,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502889443] [2023-11-29 06:32:49,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:49,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:32:49,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:49,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:32:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:32:49,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 06:32:49,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 821 transitions, 19731 flow. Second operand has 22 states, 22 states have (on average 10.636363636363637) internal successors, (234), 22 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:49,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:49,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 06:32:49,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:51,184 INFO L124 PetriNetUnfolderBase]: 1494/3323 cut-off events. [2023-11-29 06:32:51,184 INFO L125 PetriNetUnfolderBase]: For 106464/106593 co-relation queries the response was YES. [2023-11-29 06:32:51,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29686 conditions, 3323 events. 1494/3323 cut-off events. For 106464/106593 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 24434 event pairs, 99 based on Foata normal form. 118/3399 useless extension candidates. Maximal degree in co-relation 29597. Up to 1744 conditions per place. [2023-11-29 06:32:51,231 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 242 selfloop transitions, 13 changer transitions 95/463 dead transitions. [2023-11-29 06:32:51,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 463 transitions, 10436 flow [2023-11-29 06:32:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:32:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 06:32:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 165 transitions. [2023-11-29 06:32:51,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-29 06:32:51,233 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 165 transitions. [2023-11-29 06:32:51,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 165 transitions. [2023-11-29 06:32:51,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:51,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 165 transitions. [2023-11-29 06:32:51,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 15.0) internal successors, (165), 11 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 06:32:51,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 30.0) internal successors, (360), 12 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:51,234 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 30.0) internal successors, (360), 12 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:51,234 INFO L175 Difference]: Start difference. First operand has 337 places, 821 transitions, 19731 flow. Second operand 11 states and 165 transitions. [2023-11-29 06:32:51,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 463 transitions, 10436 flow [2023-11-29 06:32:51,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 463 transitions, 9536 flow, removed 109 selfloop flow, removed 52 redundant places. [2023-11-29 06:32:51,702 INFO L231 Difference]: Finished difference. Result has 257 places, 337 transitions, 7046 flow [2023-11-29 06:32:51,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=8598, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7046, PETRI_PLACES=257, PETRI_TRANSITIONS=337} [2023-11-29 06:32:51,703 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2023-11-29 06:32:51,703 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 337 transitions, 7046 flow [2023-11-29 06:32:51,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.636363636363637) internal successors, (234), 22 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:51,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:51,704 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 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 06:32:51,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:32:51,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:32:51,904 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 06:32:51,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:32:51,905 INFO L85 PathProgramCache]: Analyzing trace with hash 286724762, now seen corresponding path program 10 times [2023-11-29 06:32:51,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:32:51,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796626266] [2023-11-29 06:32:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:32:51,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:32:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:32:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:52,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:32:52,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796626266] [2023-11-29 06:32:52,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796626266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:32:52,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253573322] [2023-11-29 06:32:52,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:32:52,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:32:52,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:32:52,474 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:32:52,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:32:52,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:32:52,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:32:52,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:32:52,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:32:52,991 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:32:52,992 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 06:32:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:53,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:32:53,141 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 06:32:53,141 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 26 treesize of output 14 [2023-11-29 06:32:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:32:53,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253573322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:32:53,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:32:53,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-11-29 06:32:53,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945235225] [2023-11-29 06:32:53,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:32:53,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 06:32:53,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:32:53,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 06:32:53,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:32:53,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 06:32:53,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 337 transitions, 7046 flow. Second operand has 31 states, 31 states have (on average 8.387096774193548) internal successors, (260), 31 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:53,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:32:53,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 06:32:53,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:32:59,199 INFO L124 PetriNetUnfolderBase]: 5049/9660 cut-off events. [2023-11-29 06:32:59,199 INFO L125 PetriNetUnfolderBase]: For 283132/283846 co-relation queries the response was YES. [2023-11-29 06:32:59,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80758 conditions, 9660 events. 5049/9660 cut-off events. For 283132/283846 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 67330 event pairs, 469 based on Foata normal form. 539/10173 useless extension candidates. Maximal degree in co-relation 80698. Up to 2311 conditions per place. [2023-11-29 06:32:59,292 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 923 selfloop transitions, 480 changer transitions 0/1476 dead transitions. [2023-11-29 06:32:59,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1476 transitions, 31710 flow [2023-11-29 06:32:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 06:32:59,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-29 06:32:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 760 transitions. [2023-11-29 06:32:59,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-29 06:32:59,294 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 760 transitions. [2023-11-29 06:32:59,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 760 transitions. [2023-11-29 06:32:59,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:32:59,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 760 transitions. [2023-11-29 06:32:59,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 15.833333333333334) internal successors, (760), 48 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:59,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 30.0) internal successors, (1470), 49 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:59,298 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 30.0) internal successors, (1470), 49 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:59,298 INFO L175 Difference]: Start difference. First operand has 257 places, 337 transitions, 7046 flow. Second operand 48 states and 760 transitions. [2023-11-29 06:32:59,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1476 transitions, 31710 flow [2023-11-29 06:32:59,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 1476 transitions, 29437 flow, removed 452 selfloop flow, removed 27 redundant places. [2023-11-29 06:32:59,884 INFO L231 Difference]: Finished difference. Result has 285 places, 760 transitions, 18749 flow [2023-11-29 06:32:59,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=6591, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=18749, PETRI_PLACES=285, PETRI_TRANSITIONS=760} [2023-11-29 06:32:59,884 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2023-11-29 06:32:59,885 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 760 transitions, 18749 flow [2023-11-29 06:32:59,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.387096774193548) internal successors, (260), 31 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:32:59,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:32:59,885 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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 06:32:59,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:33:00,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:00,085 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:00,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:00,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1785386332, now seen corresponding path program 11 times [2023-11-29 06:33:00,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:00,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662970053] [2023-11-29 06:33:00,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:00,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:00,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:00,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662970053] [2023-11-29 06:33:00,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662970053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:00,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444374516] [2023-11-29 06:33:00,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:33:00,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:00,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:00,224 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:00,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:33:00,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:33:00,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:00,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:33:00,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:33:00,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:00,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444374516] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:00,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:00,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 6] total 15 [2023-11-29 06:33:00,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306119649] [2023-11-29 06:33:00,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:00,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 06:33:00,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:00,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 06:33:00,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:33:00,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2023-11-29 06:33:00,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 760 transitions, 18749 flow. Second operand has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:00,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:00,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2023-11-29 06:33:00,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:03,941 INFO L124 PetriNetUnfolderBase]: 5248/11021 cut-off events. [2023-11-29 06:33:03,941 INFO L125 PetriNetUnfolderBase]: For 532838/534131 co-relation queries the response was YES. [2023-11-29 06:33:04,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105616 conditions, 11021 events. 5248/11021 cut-off events. For 532838/534131 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 87795 event pairs, 505 based on Foata normal form. 300/11196 useless extension candidates. Maximal degree in co-relation 105527. Up to 3920 conditions per place. [2023-11-29 06:33:04,113 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 491 selfloop transitions, 249 changer transitions 53/994 dead transitions. [2023-11-29 06:33:04,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 994 transitions, 24686 flow [2023-11-29 06:33:04,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:33:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 06:33:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 205 transitions. [2023-11-29 06:33:04,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2023-11-29 06:33:04,115 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 205 transitions. [2023-11-29 06:33:04,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 205 transitions. [2023-11-29 06:33:04,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:04,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 205 transitions. [2023-11-29 06:33:04,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:04,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:04,116 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:04,116 INFO L175 Difference]: Start difference. First operand has 285 places, 760 transitions, 18749 flow. Second operand 13 states and 205 transitions. [2023-11-29 06:33:04,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 994 transitions, 24686 flow [2023-11-29 06:33:06,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 994 transitions, 23671 flow, removed 488 selfloop flow, removed 8 redundant places. [2023-11-29 06:33:06,841 INFO L231 Difference]: Finished difference. Result has 291 places, 859 transitions, 21800 flow [2023-11-29 06:33:06,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=17745, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=21800, PETRI_PLACES=291, PETRI_TRANSITIONS=859} [2023-11-29 06:33:06,842 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 261 predicate places. [2023-11-29 06:33:06,842 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 859 transitions, 21800 flow [2023-11-29 06:33:06,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.8125) internal successors, (189), 16 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:06,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:06,842 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 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 06:33:06,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:33:07,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:07,043 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:07,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1108798290, now seen corresponding path program 12 times [2023-11-29 06:33:07,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:07,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353529778] [2023-11-29 06:33:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:07,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:07,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:07,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353529778] [2023-11-29 06:33:07,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353529778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:07,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331204124] [2023-11-29 06:33:07,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:33:07,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:07,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:07,715 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:07,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:33:07,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:33:07,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:07,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:33:07,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:08,233 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:33:08,233 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 06:33:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:08,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:08,414 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 06:33:08,414 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 26 treesize of output 14 [2023-11-29 06:33:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:08,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331204124] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:08,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:08,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-11-29 06:33:08,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630218862] [2023-11-29 06:33:08,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:08,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 06:33:08,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:08,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 06:33:08,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:33:08,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 06:33:08,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 859 transitions, 21800 flow. Second operand has 31 states, 31 states have (on average 8.387096774193548) internal successors, (260), 31 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:08,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:08,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 06:33:08,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:19,030 INFO L124 PetriNetUnfolderBase]: 9824/19071 cut-off events. [2023-11-29 06:33:19,031 INFO L125 PetriNetUnfolderBase]: For 1175764/1177650 co-relation queries the response was YES. [2023-11-29 06:33:19,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186525 conditions, 19071 events. 9824/19071 cut-off events. For 1175764/1177650 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 155315 event pairs, 794 based on Foata normal form. 1408/20451 useless extension candidates. Maximal degree in co-relation 186434. Up to 5007 conditions per place. [2023-11-29 06:33:19,287 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 981 selfloop transitions, 1001 changer transitions 13/2060 dead transitions. [2023-11-29 06:33:19,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 2060 transitions, 53181 flow [2023-11-29 06:33:19,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 06:33:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-11-29 06:33:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 921 transitions. [2023-11-29 06:33:19,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032786885245901 [2023-11-29 06:33:19,289 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 921 transitions. [2023-11-29 06:33:19,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 921 transitions. [2023-11-29 06:33:19,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:19,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 921 transitions. [2023-11-29 06:33:19,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 15.098360655737705) internal successors, (921), 61 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:19,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 30.0) internal successors, (1860), 62 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:19,295 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 30.0) internal successors, (1860), 62 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:19,295 INFO L175 Difference]: Start difference. First operand has 291 places, 859 transitions, 21800 flow. Second operand 61 states and 921 transitions. [2023-11-29 06:33:19,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 2060 transitions, 53181 flow [2023-11-29 06:33:26,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 2060 transitions, 48001 flow, removed 1071 selfloop flow, removed 25 redundant places. [2023-11-29 06:33:26,045 INFO L231 Difference]: Finished difference. Result has 326 places, 1362 transitions, 39364 flow [2023-11-29 06:33:26,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=17500, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=39364, PETRI_PLACES=326, PETRI_TRANSITIONS=1362} [2023-11-29 06:33:26,046 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 296 predicate places. [2023-11-29 06:33:26,046 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 1362 transitions, 39364 flow [2023-11-29 06:33:26,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.387096774193548) internal successors, (260), 31 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:26,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:26,047 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 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 06:33:26,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:33:26,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 06:33:26,247 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:26,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:26,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1957566082, now seen corresponding path program 13 times [2023-11-29 06:33:26,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:26,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663146210] [2023-11-29 06:33:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:26,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:26,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:26,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663146210] [2023-11-29 06:33:26,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663146210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:26,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742923033] [2023-11-29 06:33:26,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:33:26,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:26,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:26,690 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:26,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:33:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:26,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:33:26,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:27,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:27,077 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 15 [2023-11-29 06:33:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:27,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:27,333 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 06:33:27,333 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 26 treesize of output 14 [2023-11-29 06:33:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:27,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742923033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:27,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:27,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-29 06:33:27,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731294732] [2023-11-29 06:33:27,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:27,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:33:27,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:27,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:33:27,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:33:27,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 06:33:27,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1362 transitions, 39364 flow. Second operand has 32 states, 32 states have (on average 8.21875) internal successors, (263), 32 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:27,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:27,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 06:33:27,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:37,614 INFO L124 PetriNetUnfolderBase]: 7640/15438 cut-off events. [2023-11-29 06:33:37,614 INFO L125 PetriNetUnfolderBase]: For 1096027/1097085 co-relation queries the response was YES. [2023-11-29 06:33:37,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153461 conditions, 15438 events. 7640/15438 cut-off events. For 1096027/1097085 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 125259 event pairs, 850 based on Foata normal form. 726/16138 useless extension candidates. Maximal degree in co-relation 153344. Up to 3885 conditions per place. [2023-11-29 06:33:37,832 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 649 selfloop transitions, 477 changer transitions 351/1542 dead transitions. [2023-11-29 06:33:37,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1542 transitions, 40860 flow [2023-11-29 06:33:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 06:33:37,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 06:33:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 578 transitions. [2023-11-29 06:33:37,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5207207207207207 [2023-11-29 06:33:37,833 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 578 transitions. [2023-11-29 06:33:37,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 578 transitions. [2023-11-29 06:33:37,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:37,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 578 transitions. [2023-11-29 06:33:37,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 15.621621621621621) internal successors, (578), 37 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:37,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 30.0) internal successors, (1140), 38 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:37,836 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 30.0) internal successors, (1140), 38 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:37,836 INFO L175 Difference]: Start difference. First operand has 326 places, 1362 transitions, 39364 flow. Second operand 37 states and 578 transitions. [2023-11-29 06:33:37,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1542 transitions, 40860 flow [2023-11-29 06:33:44,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1542 transitions, 38007 flow, removed 1001 selfloop flow, removed 20 redundant places. [2023-11-29 06:33:44,412 INFO L231 Difference]: Finished difference. Result has 346 places, 827 transitions, 22981 flow [2023-11-29 06:33:44,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=25517, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=22981, PETRI_PLACES=346, PETRI_TRANSITIONS=827} [2023-11-29 06:33:44,413 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 316 predicate places. [2023-11-29 06:33:44,413 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 827 transitions, 22981 flow [2023-11-29 06:33:44,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.21875) internal successors, (263), 32 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:44,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:44,413 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 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 06:33:44,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:33:44,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 06:33:44,614 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:44,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1919728700, now seen corresponding path program 14 times [2023-11-29 06:33:44,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:44,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47871480] [2023-11-29 06:33:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:44,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:45,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:45,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47871480] [2023-11-29 06:33:45,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47871480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:45,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734469063] [2023-11-29 06:33:45,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:33:45,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:45,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:45,120 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:45,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:33:45,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:33:45,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:45,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:33:45,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:45,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:45,515 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 06:33:45,515 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 26 treesize of output 14 [2023-11-29 06:33:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:33:45,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734469063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:45,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:45,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 20 [2023-11-29 06:33:45,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599786413] [2023-11-29 06:33:45,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:45,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 06:33:45,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:45,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 06:33:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2023-11-29 06:33:45,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2023-11-29 06:33:45,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 827 transitions, 22981 flow. Second operand has 21 states, 21 states have (on average 8.666666666666666) internal successors, (182), 21 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:45,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:45,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2023-11-29 06:33:45,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:51,374 INFO L124 PetriNetUnfolderBase]: 6286/12938 cut-off events. [2023-11-29 06:33:51,374 INFO L125 PetriNetUnfolderBase]: For 900856/901774 co-relation queries the response was YES. [2023-11-29 06:33:51,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120784 conditions, 12938 events. 6286/12938 cut-off events. For 900856/901774 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 101807 event pairs, 516 based on Foata normal form. 566/13492 useless extension candidates. Maximal degree in co-relation 120667. Up to 4036 conditions per place. [2023-11-29 06:33:51,580 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 702 selfloop transitions, 539 changer transitions 14/1320 dead transitions. [2023-11-29 06:33:51,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1320 transitions, 35772 flow [2023-11-29 06:33:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 06:33:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 06:33:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 376 transitions. [2023-11-29 06:33:51,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641975308641975 [2023-11-29 06:33:51,582 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 376 transitions. [2023-11-29 06:33:51,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 376 transitions. [2023-11-29 06:33:51,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:51,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 376 transitions. [2023-11-29 06:33:51,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 13.925925925925926) internal successors, (376), 27 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:51,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 30.0) internal successors, (840), 28 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:51,584 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 30.0) internal successors, (840), 28 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:51,585 INFO L175 Difference]: Start difference. First operand has 346 places, 827 transitions, 22981 flow. Second operand 27 states and 376 transitions. [2023-11-29 06:33:51,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1320 transitions, 35772 flow [2023-11-29 06:33:55,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1320 transitions, 34495 flow, removed 316 selfloop flow, removed 25 redundant places. [2023-11-29 06:33:55,218 INFO L231 Difference]: Finished difference. Result has 351 places, 965 transitions, 29063 flow [2023-11-29 06:33:55,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=22113, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=29063, PETRI_PLACES=351, PETRI_TRANSITIONS=965} [2023-11-29 06:33:55,219 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 321 predicate places. [2023-11-29 06:33:55,219 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 965 transitions, 29063 flow [2023-11-29 06:33:55,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.666666666666666) internal successors, (182), 21 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:55,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:55,220 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:55,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:33:55,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:55,420 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:55,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:55,421 INFO L85 PathProgramCache]: Analyzing trace with hash -567283758, now seen corresponding path program 15 times [2023-11-29 06:33:55,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:55,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116721180] [2023-11-29 06:33:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:55,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:56,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:56,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116721180] [2023-11-29 06:33:56,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116721180] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:56,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667804595] [2023-11-29 06:33:56,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:33:56,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:56,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:56,501 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:56,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:33:56,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:33:56,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:56,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 06:33:56,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:57,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:33:57,772 INFO L349 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2023-11-29 06:33:57,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2023-11-29 06:33:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:58,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:59,418 INFO L349 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2023-11-29 06:33:59,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 41 [2023-11-29 06:34:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:34:00,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667804595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:34:00,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:34:00,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 59 [2023-11-29 06:34:00,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164015695] [2023-11-29 06:34:00,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:34:00,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 06:34:00,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:34:00,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 06:34:00,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=3196, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 06:34:00,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:34:00,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 965 transitions, 29063 flow. Second operand has 60 states, 60 states have (on average 5.65) internal successors, (339), 60 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:00,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:34:00,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:34:00,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:34:40,513 INFO L124 PetriNetUnfolderBase]: 14353/27164 cut-off events. [2023-11-29 06:34:40,513 INFO L125 PetriNetUnfolderBase]: For 1510008/1510008 co-relation queries the response was YES. [2023-11-29 06:34:40,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252119 conditions, 27164 events. 14353/27164 cut-off events. For 1510008/1510008 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 219237 event pairs, 898 based on Foata normal form. 43/27207 useless extension candidates. Maximal degree in co-relation 252001. Up to 6149 conditions per place. [2023-11-29 06:34:40,926 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 956 selfloop transitions, 1635 changer transitions 194/2787 dead transitions. [2023-11-29 06:34:40,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 2787 transitions, 75747 flow [2023-11-29 06:34:40,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-11-29 06:34:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2023-11-29 06:34:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 1281 transitions. [2023-11-29 06:34:40,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2023-11-29 06:34:40,930 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 1281 transitions. [2023-11-29 06:34:40,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 1281 transitions. [2023-11-29 06:34:40,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:34:40,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 1281 transitions. [2023-11-29 06:34:40,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 10.5) internal successors, (1281), 122 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:40,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 30.0) internal successors, (3690), 123 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:40,940 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 30.0) internal successors, (3690), 123 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:40,940 INFO L175 Difference]: Start difference. First operand has 351 places, 965 transitions, 29063 flow. Second operand 122 states and 1281 transitions. [2023-11-29 06:34:40,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 2787 transitions, 75747 flow [2023-11-29 06:34:51,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2787 transitions, 74767 flow, removed 179 selfloop flow, removed 17 redundant places. [2023-11-29 06:34:51,297 INFO L231 Difference]: Finished difference. Result has 504 places, 2024 transitions, 65314 flow [2023-11-29 06:34:51,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=28437, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=694, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=65314, PETRI_PLACES=504, PETRI_TRANSITIONS=2024} [2023-11-29 06:34:51,298 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 474 predicate places. [2023-11-29 06:34:51,298 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 2024 transitions, 65314 flow [2023-11-29 06:34:51,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 5.65) internal successors, (339), 60 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:51,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:34:51,298 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:34:51,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:34:51,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:51,499 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:34:51,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:34:51,499 INFO L85 PathProgramCache]: Analyzing trace with hash -565399722, now seen corresponding path program 16 times [2023-11-29 06:34:51,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:34:51,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895572305] [2023-11-29 06:34:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:34:51,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:34:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:34:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:34:52,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:34:52,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895572305] [2023-11-29 06:34:52,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895572305] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:34:52,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212645716] [2023-11-29 06:34:52,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:34:52,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:52,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:34:52,667 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:34:52,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:34:52,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:34:52,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:34:52,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 06:34:52,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:34:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:34:53,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:34:53,959 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:34:53,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-29 06:34:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:34:54,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212645716] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:34:54,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:34:54,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 14] total 48 [2023-11-29 06:34:54,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921295046] [2023-11-29 06:34:54,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:34:54,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 06:34:54,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:34:54,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 06:34:54,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2200, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 06:34:54,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:34:54,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 2024 transitions, 65314 flow. Second operand has 49 states, 49 states have (on average 5.836734693877551) internal successors, (286), 49 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 06:34:54,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:34:54,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:34:54,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:15,663 INFO L124 PetriNetUnfolderBase]: 13083/24938 cut-off events. [2023-11-29 06:35:15,663 INFO L125 PetriNetUnfolderBase]: For 1626177/1626177 co-relation queries the response was YES. [2023-11-29 06:35:16,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257180 conditions, 24938 events. 13083/24938 cut-off events. For 1626177/1626177 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 201845 event pairs, 1251 based on Foata normal form. 5/24943 useless extension candidates. Maximal degree in co-relation 257015. Up to 12474 conditions per place. [2023-11-29 06:35:16,321 INFO L140 encePairwiseOnDemand]: 17/30 looper letters, 885 selfloop transitions, 1331 changer transitions 72/2290 dead transitions. [2023-11-29 06:35:16,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 2290 transitions, 73631 flow [2023-11-29 06:35:16,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 06:35:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-29 06:35:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 491 transitions. [2023-11-29 06:35:16,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3340136054421769 [2023-11-29 06:35:16,323 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 491 transitions. [2023-11-29 06:35:16,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 491 transitions. [2023-11-29 06:35:16,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:16,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 491 transitions. [2023-11-29 06:35:16,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 10.020408163265307) internal successors, (491), 49 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:16,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 30.0) internal successors, (1500), 50 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:16,326 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 30.0) internal successors, (1500), 50 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:16,326 INFO L175 Difference]: Start difference. First operand has 504 places, 2024 transitions, 65314 flow. Second operand 49 states and 491 transitions. [2023-11-29 06:35:16,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 2290 transitions, 73631 flow [2023-11-29 06:35:34,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 2290 transitions, 71989 flow, removed 752 selfloop flow, removed 22 redundant places. [2023-11-29 06:35:34,270 INFO L231 Difference]: Finished difference. Result has 526 places, 2056 transitions, 69406 flow [2023-11-29 06:35:34,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=63780, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=69406, PETRI_PLACES=526, PETRI_TRANSITIONS=2056} [2023-11-29 06:35:34,272 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 496 predicate places. [2023-11-29 06:35:34,272 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 2056 transitions, 69406 flow [2023-11-29 06:35:34,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.836734693877551) internal successors, (286), 49 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 06:35:34,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:34,272 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:34,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:35:34,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:34,473 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:35:34,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1564036276, now seen corresponding path program 17 times [2023-11-29 06:35:34,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:34,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253208460] [2023-11-29 06:35:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:34,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:35:35,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:35,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253208460] [2023-11-29 06:35:35,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253208460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:35,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090406912] [2023-11-29 06:35:35,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:35:35,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:35,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:35,548 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:35,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:35:35,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:35:35,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:35,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-29 06:35:35,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:36,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:35:36,487 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 7 [2023-11-29 06:35:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:35:36,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:37,685 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-29 06:35:37,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 46 [2023-11-29 06:35:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:35:38,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090406912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:38,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:38,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 59 [2023-11-29 06:35:38,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639047663] [2023-11-29 06:35:38,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:38,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 06:35:38,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:38,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 06:35:38,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=3091, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 06:35:38,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:35:38,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 2056 transitions, 69406 flow. Second operand has 60 states, 60 states have (on average 5.65) internal successors, (339), 60 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:38,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:38,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:35:38,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:18,615 INFO L124 PetriNetUnfolderBase]: 14003/26722 cut-off events. [2023-11-29 06:36:18,615 INFO L125 PetriNetUnfolderBase]: For 1840649/1840649 co-relation queries the response was YES. [2023-11-29 06:36:19,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282461 conditions, 26722 events. 14003/26722 cut-off events. For 1840649/1840649 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 219510 event pairs, 527 based on Foata normal form. 3/26725 useless extension candidates. Maximal degree in co-relation 282291. Up to 8912 conditions per place. [2023-11-29 06:36:19,181 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 797 selfloop transitions, 2175 changer transitions 69/3043 dead transitions. [2023-11-29 06:36:19,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 3043 transitions, 94465 flow [2023-11-29 06:36:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-11-29 06:36:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2023-11-29 06:36:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 1371 transitions. [2023-11-29 06:36:19,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3006578947368421 [2023-11-29 06:36:19,185 INFO L72 ComplementDD]: Start complementDD. Operand 152 states and 1371 transitions. [2023-11-29 06:36:19,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 152 states and 1371 transitions. [2023-11-29 06:36:19,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:19,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 152 states and 1371 transitions. [2023-11-29 06:36:19,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 153 states, 152 states have (on average 9.019736842105264) internal successors, (1371), 152 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:19,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 153 states, 153 states have (on average 30.0) internal successors, (4590), 153 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:19,196 INFO L81 ComplementDD]: Finished complementDD. Result has 153 states, 153 states have (on average 30.0) internal successors, (4590), 153 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:19,196 INFO L175 Difference]: Start difference. First operand has 526 places, 2056 transitions, 69406 flow. Second operand 152 states and 1371 transitions. [2023-11-29 06:36:19,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 3043 transitions, 94465 flow [2023-11-29 06:36:38,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 3043 transitions, 94041 flow, removed 134 selfloop flow, removed 28 redundant places. [2023-11-29 06:36:38,467 INFO L231 Difference]: Finished difference. Result has 667 places, 2578 transitions, 90478 flow [2023-11-29 06:36:38,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=69144, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2056, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=152, PETRI_FLOW=90478, PETRI_PLACES=667, PETRI_TRANSITIONS=2578} [2023-11-29 06:36:38,469 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 637 predicate places. [2023-11-29 06:36:38,469 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 2578 transitions, 90478 flow [2023-11-29 06:36:38,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 5.65) internal successors, (339), 60 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:38,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:38,469 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:38,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:36:38,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:38,670 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:36:38,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:38,670 INFO L85 PathProgramCache]: Analyzing trace with hash 917745924, now seen corresponding path program 18 times [2023-11-29 06:36:38,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:38,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854389365] [2023-11-29 06:36:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:38,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:39,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:39,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854389365] [2023-11-29 06:36:39,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854389365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:39,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499026654] [2023-11-29 06:36:39,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:36:39,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:39,700 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:39,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:36:39,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:36:39,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:39,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 06:36:39,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:40,841 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:36:40,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:36:40,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:40,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 13 [2023-11-29 06:36:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:41,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:41,946 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 06:36:41,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 56 [2023-11-29 06:36:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:42,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499026654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:42,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:42,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 58 [2023-11-29 06:36:42,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76643895] [2023-11-29 06:36:42,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:42,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 06:36:42,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:42,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 06:36:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3123, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 06:36:42,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:36:42,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 2578 transitions, 90478 flow. Second operand has 59 states, 59 states have (on average 5.677966101694915) internal successors, (335), 59 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:42,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:42,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:36:42,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:37:30,095 INFO L124 PetriNetUnfolderBase]: 15664/30331 cut-off events. [2023-11-29 06:37:30,095 INFO L125 PetriNetUnfolderBase]: For 2284505/2284505 co-relation queries the response was YES. [2023-11-29 06:37:30,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336077 conditions, 30331 events. 15664/30331 cut-off events. For 2284505/2284505 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 258423 event pairs, 1218 based on Foata normal form. 7/30338 useless extension candidates. Maximal degree in co-relation 335888. Up to 9727 conditions per place. [2023-11-29 06:37:30,950 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 1032 selfloop transitions, 2396 changer transitions 117/3547 dead transitions. [2023-11-29 06:37:30,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 792 places, 3547 transitions, 119760 flow [2023-11-29 06:37:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2023-11-29 06:37:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2023-11-29 06:37:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 1239 transitions. [2023-11-29 06:37:30,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3014598540145985 [2023-11-29 06:37:30,954 INFO L72 ComplementDD]: Start complementDD. Operand 137 states and 1239 transitions. [2023-11-29 06:37:30,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 137 states and 1239 transitions. [2023-11-29 06:37:30,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:37:30,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 137 states and 1239 transitions. [2023-11-29 06:37:30,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 138 states, 137 states have (on average 9.043795620437956) internal successors, (1239), 137 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:30,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 138 states, 138 states have (on average 30.0) internal successors, (4140), 138 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:30,962 INFO L81 ComplementDD]: Finished complementDD. Result has 138 states, 138 states have (on average 30.0) internal successors, (4140), 138 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:30,962 INFO L175 Difference]: Start difference. First operand has 667 places, 2578 transitions, 90478 flow. Second operand 137 states and 1239 transitions. [2023-11-29 06:37:30,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 792 places, 3547 transitions, 119760 flow [2023-11-29 06:38:06,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 3547 transitions, 116814 flow, removed 1108 selfloop flow, removed 46 redundant places. [2023-11-29 06:38:07,026 INFO L231 Difference]: Finished difference. Result has 773 places, 3073 transitions, 112758 flow [2023-11-29 06:38:07,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=88098, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1924, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=137, PETRI_FLOW=112758, PETRI_PLACES=773, PETRI_TRANSITIONS=3073} [2023-11-29 06:38:07,028 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 743 predicate places. [2023-11-29 06:38:07,028 INFO L495 AbstractCegarLoop]: Abstraction has has 773 places, 3073 transitions, 112758 flow [2023-11-29 06:38:07,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 5.677966101694915) internal successors, (335), 59 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:07,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:38:07,028 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:38:07,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:38:07,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 06:38:07,229 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:38:07,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:07,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2023559408, now seen corresponding path program 19 times [2023-11-29 06:38:07,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:07,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998234909] [2023-11-29 06:38:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:07,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:38:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:38:08,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:08,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998234909] [2023-11-29 06:38:08,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998234909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:08,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695763374] [2023-11-29 06:38:08,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:38:08,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:08,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:38:08,254 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:38:08,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:38:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:38:08,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 06:38:08,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:38:09,323 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 06:38:09,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:38:09,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:38:09,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 13 [2023-11-29 06:38:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:38:09,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:10,136 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 06:38:10,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 53 [2023-11-29 06:38:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:38:10,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695763374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:38:10,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:38:10,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 57 [2023-11-29 06:38:10,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219224879] [2023-11-29 06:38:10,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:10,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-29 06:38:10,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:10,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-29 06:38:10,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2951, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 06:38:10,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:38:10,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 773 places, 3073 transitions, 112758 flow. Second operand has 58 states, 58 states have (on average 5.706896551724138) internal successors, (331), 58 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:10,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:38:10,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:38:10,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:39:11,029 INFO L124 PetriNetUnfolderBase]: 20390/39016 cut-off events. [2023-11-29 06:39:11,029 INFO L125 PetriNetUnfolderBase]: For 3162917/3162917 co-relation queries the response was YES. [2023-11-29 06:39:11,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455582 conditions, 39016 events. 20390/39016 cut-off events. For 3162917/3162917 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 337040 event pairs, 2001 based on Foata normal form. 4/39020 useless extension candidates. Maximal degree in co-relation 455377. Up to 14275 conditions per place. [2023-11-29 06:39:12,292 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 993 selfloop transitions, 3430 changer transitions 58/4483 dead transitions. [2023-11-29 06:39:12,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 850 places, 4483 transitions, 169829 flow [2023-11-29 06:39:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-29 06:39:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2023-11-29 06:39:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 922 transitions. [2023-11-29 06:39:12,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31360544217687075 [2023-11-29 06:39:12,295 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 922 transitions. [2023-11-29 06:39:12,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 922 transitions. [2023-11-29 06:39:12,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:39:12,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 922 transitions. [2023-11-29 06:39:12,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 9.408163265306122) internal successors, (922), 98 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:39:12,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 30.0) internal successors, (2970), 99 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:39:12,302 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 30.0) internal successors, (2970), 99 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:39:12,302 INFO L175 Difference]: Start difference. First operand has 773 places, 3073 transitions, 112758 flow. Second operand 98 states and 922 transitions. [2023-11-29 06:39:12,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 850 places, 4483 transitions, 169829 flow [2023-11-29 06:40:04,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 4483 transitions, 167399 flow, removed 729 selfloop flow, removed 53 redundant places. [2023-11-29 06:40:04,417 INFO L231 Difference]: Finished difference. Result has 817 places, 4151 transitions, 166462 flow [2023-11-29 06:40:04,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=110845, PETRI_DIFFERENCE_MINUEND_PLACES=700, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=166462, PETRI_PLACES=817, PETRI_TRANSITIONS=4151} [2023-11-29 06:40:04,420 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 787 predicate places. [2023-11-29 06:40:04,420 INFO L495 AbstractCegarLoop]: Abstraction has has 817 places, 4151 transitions, 166462 flow [2023-11-29 06:40:04,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 5.706896551724138) internal successors, (331), 58 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:40:04,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:40:04,420 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:40:04,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 06:40:04,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:40:04,621 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:40:04,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:40:04,621 INFO L85 PathProgramCache]: Analyzing trace with hash -400767876, now seen corresponding path program 20 times [2023-11-29 06:40:04,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:40:04,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232487761] [2023-11-29 06:40:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:40:04,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:40:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:40:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:40:05,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:40:05,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232487761] [2023-11-29 06:40:05,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232487761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:40:05,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689724141] [2023-11-29 06:40:05,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:40:05,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:40:05,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:40:05,810 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:40:05,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 06:40:05,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:40:05,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:40:05,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 06:40:05,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:40:06,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:40:06,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2023-11-29 06:40:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:40:06,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:40:07,647 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:40:07,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-29 06:40:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:40:08,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689724141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:40:08,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:40:08,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 57 [2023-11-29 06:40:08,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503652310] [2023-11-29 06:40:08,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:40:08,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-29 06:40:08,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:40:08,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-29 06:40:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=2930, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 06:40:08,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:40:08,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 817 places, 4151 transitions, 166462 flow. Second operand has 58 states, 58 states have (on average 5.706896551724138) internal successors, (331), 58 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:40:08,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:40:08,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:40:08,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:41:27,317 INFO L124 PetriNetUnfolderBase]: 20918/40214 cut-off events. [2023-11-29 06:41:27,317 INFO L125 PetriNetUnfolderBase]: For 3584518/3584518 co-relation queries the response was YES. [2023-11-29 06:41:28,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488869 conditions, 40214 events. 20918/40214 cut-off events. For 3584518/3584518 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 350686 event pairs, 1601 based on Foata normal form. 9/40223 useless extension candidates. Maximal degree in co-relation 488659. Up to 15245 conditions per place. [2023-11-29 06:41:28,447 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 998 selfloop transitions, 3543 changer transitions 107/4650 dead transitions. [2023-11-29 06:41:28,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 931 places, 4650 transitions, 184773 flow [2023-11-29 06:41:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-11-29 06:41:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2023-11-29 06:41:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 1122 transitions. [2023-11-29 06:41:28,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3040650406504065 [2023-11-29 06:41:28,449 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 1122 transitions. [2023-11-29 06:41:28,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 1122 transitions. [2023-11-29 06:41:28,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:41:28,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 1122 transitions. [2023-11-29 06:41:28,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 9.121951219512194) internal successors, (1122), 123 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:41:28,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 30.0) internal successors, (3720), 124 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:41:28,455 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 30.0) internal successors, (3720), 124 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:41:28,455 INFO L175 Difference]: Start difference. First operand has 817 places, 4151 transitions, 166462 flow. Second operand 123 states and 1122 transitions. [2023-11-29 06:41:28,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 931 places, 4650 transitions, 184773 flow [2023-11-29 06:42:21,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 4650 transitions, 183087 flow, removed 652 selfloop flow, removed 45 redundant places. [2023-11-29 06:42:21,785 INFO L231 Difference]: Finished difference. Result has 901 places, 4251 transitions, 178728 flow [2023-11-29 06:42:21,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=164818, PETRI_DIFFERENCE_MINUEND_PLACES=764, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=178728, PETRI_PLACES=901, PETRI_TRANSITIONS=4251} [2023-11-29 06:42:21,788 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 871 predicate places. [2023-11-29 06:42:21,788 INFO L495 AbstractCegarLoop]: Abstraction has has 901 places, 4251 transitions, 178728 flow [2023-11-29 06:42:21,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 5.706896551724138) internal successors, (331), 58 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:21,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:21,789 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:42:21,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 06:42:21,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 06:42:21,989 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:42:21,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:21,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1342895584, now seen corresponding path program 21 times [2023-11-29 06:42:21,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:42:21,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914678778] [2023-11-29 06:42:21,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:21,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:42:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:42:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:23,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:42:23,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914678778] [2023-11-29 06:42:23,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914678778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:42:23,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83160017] [2023-11-29 06:42:23,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:42:23,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:42:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:42:23,079 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:42:23,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32f5d56a-8817-4062-a6f7-19de61251b3e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 06:42:23,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:42:23,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:42:23,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 06:42:23,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:23,923 INFO L349 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-11-29 06:42:23,923 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 36 treesize of output 20 [2023-11-29 06:42:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:24,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:42:25,105 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-29 06:42:25,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 45 [2023-11-29 06:42:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:25,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83160017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:42:25,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:42:25,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 57 [2023-11-29 06:42:25,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404795853] [2023-11-29 06:42:25,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:42:25,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-29 06:42:25,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:42:25,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-29 06:42:25,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=3017, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 06:42:25,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2023-11-29 06:42:25,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 901 places, 4251 transitions, 178728 flow. Second operand has 58 states, 58 states have (on average 5.655172413793103) internal successors, (328), 58 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:25,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:42:25,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2023-11-29 06:42:25,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:16,277 INFO L124 PetriNetUnfolderBase]: 24830/47040 cut-off events. [2023-11-29 06:44:16,277 INFO L125 PetriNetUnfolderBase]: For 4969302/4969302 co-relation queries the response was YES. [2023-11-29 06:44:17,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604438 conditions, 47040 events. 24830/47040 cut-off events. For 4969302/4969302 co-relation queries the response was YES. Maximal size of possible extension queue 855. Compared 417606 event pairs, 1532 based on Foata normal form. 13/47053 useless extension candidates. Maximal degree in co-relation 604219. Up to 11318 conditions per place. [2023-11-29 06:44:17,650 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 1065 selfloop transitions, 4525 changer transitions 137/5729 dead transitions. [2023-11-29 06:44:17,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1044 places, 5729 transitions, 234184 flow [2023-11-29 06:44:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2023-11-29 06:44:17,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2023-11-29 06:44:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 1499 transitions. [2023-11-29 06:44:17,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31035196687370603 [2023-11-29 06:44:17,653 INFO L72 ComplementDD]: Start complementDD. Operand 161 states and 1499 transitions. [2023-11-29 06:44:17,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 161 states and 1499 transitions. [2023-11-29 06:44:17,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:17,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 161 states and 1499 transitions. [2023-11-29 06:44:17,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 162 states, 161 states have (on average 9.31055900621118) internal successors, (1499), 161 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:17,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 162 states, 162 states have (on average 30.0) internal successors, (4860), 162 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:17,660 INFO L81 ComplementDD]: Finished complementDD. Result has 162 states, 162 states have (on average 30.0) internal successors, (4860), 162 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:17,661 INFO L175 Difference]: Start difference. First operand has 901 places, 4251 transitions, 178728 flow. Second operand 161 states and 1499 transitions. [2023-11-29 06:44:17,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1044 places, 5729 transitions, 234184 flow