./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/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_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/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_680393b3-3590-4a35-946a-fb03dca2d255/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 38e3acb82ec05e672eff9207911c10948d6c695f982992ce82b68981a799bba7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:20:56,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:20:56,984 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:20:56,989 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:20:56,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:20:57,015 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:20:57,016 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:20:57,017 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:20:57,017 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:20:57,018 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:20:57,018 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:20:57,019 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:20:57,020 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:20:57,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:20:57,021 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:20:57,021 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:20:57,022 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:20:57,022 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:20:57,023 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:20:57,023 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:20:57,023 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:20:57,024 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:20:57,025 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:20:57,025 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:20:57,025 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:20:57,026 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:20:57,026 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:20:57,027 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:20:57,027 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:20:57,028 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:20:57,028 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:20:57,028 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:20:57,029 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:20:57,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:20:57,030 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:20:57,030 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:20:57,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:20:57,031 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:20:57,031 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:20:57,031 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:20:57,031 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:20:57,032 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:20:57,032 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_680393b3-3590-4a35-946a-fb03dca2d255/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38e3acb82ec05e672eff9207911c10948d6c695f982992ce82b68981a799bba7 [2023-11-29 06:20:57,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:20:57,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:20:57,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:20:57,267 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:20:57,267 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:20:57,268 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2023-11-29 06:20:59,985 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:21:00,139 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:21:00,139 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2023-11-29 06:21:00,145 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/data/b2db2e3ac/62edb0dd085a44f58f8c0c2723fe3fac/FLAG79415cbd9 [2023-11-29 06:21:00,158 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/data/b2db2e3ac/62edb0dd085a44f58f8c0c2723fe3fac [2023-11-29 06:21:00,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:21:00,161 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:21:00,162 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:21:00,162 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:21:00,168 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:21:00,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64094c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00, skipping insertion in model container [2023-11-29 06:21:00,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,195 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:21:00,336 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_680393b3-3590-4a35-946a-fb03dca2d255/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c[2559,2572] [2023-11-29 06:21:00,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:21:00,350 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:21:00,375 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_680393b3-3590-4a35-946a-fb03dca2d255/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c[2559,2572] [2023-11-29 06:21:00,377 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:21:00,385 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:21:00,385 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:21:00,393 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:21:00,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00 WrapperNode [2023-11-29 06:21:00,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:21:00,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:21:00,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:21:00,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:21:00,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,412 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,436 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 125 [2023-11-29 06:21:00,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:21:00,438 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:21:00,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:21:00,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:21:00,450 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,450 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,453 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,471 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 06:21:00,471 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,471 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,478 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,482 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,485 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,490 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:21:00,491 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:21:00,491 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:21:00,491 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:21:00,492 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (1/1) ... [2023-11-29 06:21:00,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:21:00,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:00,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:21:00,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:21:00,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:21:00,553 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:21:00,554 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:21:00,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:21:00,554 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:21:00,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 06:21:00,554 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 06:21:00,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-29 06:21:00,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-29 06:21:00,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:21:00,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:21:00,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:21:00,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:21:00,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 06:21:00,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:21:00,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:21:00,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:21:00,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:21:00,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:21:00,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 06:21:00,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:21:00,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:21:00,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:21:00,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:21:00,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:21:00,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:21:00,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:21:00,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:21:00,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 06:21:00,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:21:00,561 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 06:21:00,686 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:21:00,688 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:21:00,903 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:21:01,056 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:21:01,056 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 06:21:01,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:21:01 BoogieIcfgContainer [2023-11-29 06:21:01,057 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:21:01,060 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:21:01,060 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:21:01,064 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:21:01,064 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:21:00" (1/3) ... [2023-11-29 06:21:01,065 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d7cc26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:21:01, skipping insertion in model container [2023-11-29 06:21:01,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:21:00" (2/3) ... [2023-11-29 06:21:01,078 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31d7cc26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:21:01, skipping insertion in model container [2023-11-29 06:21:01,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:21:01" (3/3) ... [2023-11-29 06:21:01,085 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-11-29 06:21:01,091 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:21:01,099 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:21:01,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:21:01,099 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:21:01,152 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 06:21:01,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 43 transitions, 114 flow [2023-11-29 06:21:01,211 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2023-11-29 06:21:01,211 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 06:21:01,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 39 events. 4/39 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-29 06:21:01,215 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 43 transitions, 114 flow [2023-11-29 06:21:01,219 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 38 transitions, 100 flow [2023-11-29 06:21:01,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:21:01,233 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;@211e555f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:21:01,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-29 06:21:01,250 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:21:01,250 INFO L124 PetriNetUnfolderBase]: 4/37 cut-off events. [2023-11-29 06:21:01,250 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 06:21:01,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:01,251 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, 1] [2023-11-29 06:21:01,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:01,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:01,256 INFO L85 PathProgramCache]: Analyzing trace with hash -351203351, now seen corresponding path program 1 times [2023-11-29 06:21:01,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:01,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640326246] [2023-11-29 06:21:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:01,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:01,616 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 06:21:01,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:01,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640326246] [2023-11-29 06:21:01,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640326246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:01,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:01,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:21:01,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199415052] [2023-11-29 06:21:01,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:01,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:21:01,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:01,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:21:01,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:21:01,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:21:01,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 100 flow. Second operand has 3 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 06:21:01,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:01,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:21:01,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:02,340 INFO L124 PetriNetUnfolderBase]: 3661/5016 cut-off events. [2023-11-29 06:21:02,340 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2023-11-29 06:21:02,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10212 conditions, 5016 events. 3661/5016 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21858 event pairs, 656 based on Foata normal form. 1/5004 useless extension candidates. Maximal degree in co-relation 8256. Up to 3880 conditions per place. [2023-11-29 06:21:02,386 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 53 selfloop transitions, 5 changer transitions 1/64 dead transitions. [2023-11-29 06:21:02,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 291 flow [2023-11-29 06:21:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:21:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:21:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-11-29 06:21:02,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6744186046511628 [2023-11-29 06:21:02,400 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-11-29 06:21:02,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-11-29 06:21:02,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:02,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-11-29 06:21:02,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:02,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:02,409 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:02,411 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 100 flow. Second operand 3 states and 87 transitions. [2023-11-29 06:21:02,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 291 flow [2023-11-29 06:21:02,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 261 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-29 06:21:02,425 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 117 flow [2023-11-29 06:21:02,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-11-29 06:21:02,431 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2023-11-29 06:21:02,431 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 117 flow [2023-11-29 06:21:02,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 06:21:02,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:02,432 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, 1, 1, 1, 1] [2023-11-29 06:21:02,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:21:02,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:02,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:02,433 INFO L85 PathProgramCache]: Analyzing trace with hash 618723373, now seen corresponding path program 1 times [2023-11-29 06:21:02,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:02,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509624938] [2023-11-29 06:21:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:02,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:02,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:02,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509624938] [2023-11-29 06:21:02,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509624938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:02,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:02,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:21:02,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302292319] [2023-11-29 06:21:02,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:02,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:21:02,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:02,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:21:02,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:21:02,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2023-11-29 06:21:02,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 06:21:02,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:02,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2023-11-29 06:21:02,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:03,762 INFO L124 PetriNetUnfolderBase]: 7886/10640 cut-off events. [2023-11-29 06:21:03,762 INFO L125 PetriNetUnfolderBase]: For 1803/1823 co-relation queries the response was YES. [2023-11-29 06:21:03,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24022 conditions, 10640 events. 7886/10640 cut-off events. For 1803/1823 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 53886 event pairs, 2442 based on Foata normal form. 0/10096 useless extension candidates. Maximal degree in co-relation 4622. Up to 5589 conditions per place. [2023-11-29 06:21:03,844 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 93 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2023-11-29 06:21:03,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 107 transitions, 510 flow [2023-11-29 06:21:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:21:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:21:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2023-11-29 06:21:03,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2023-11-29 06:21:03,846 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 130 transitions. [2023-11-29 06:21:03,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 130 transitions. [2023-11-29 06:21:03,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:03,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 130 transitions. [2023-11-29 06:21:03,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.0) internal successors, (130), 5 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 06:21:03,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:03,850 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:03,850 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 117 flow. Second operand 5 states and 130 transitions. [2023-11-29 06:21:03,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 107 transitions, 510 flow [2023-11-29 06:21:03,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 107 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:03,854 INFO L231 Difference]: Finished difference. Result has 48 places, 51 transitions, 175 flow [2023-11-29 06:21:03,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=48, PETRI_TRANSITIONS=51} [2023-11-29 06:21:03,855 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2023-11-29 06:21:03,856 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 51 transitions, 175 flow [2023-11-29 06:21:03,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 06:21:03,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:03,856 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, 1, 1, 1, 1] [2023-11-29 06:21:03,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:21:03,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:03,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:03,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1105966541, now seen corresponding path program 2 times [2023-11-29 06:21:03,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:03,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722637981] [2023-11-29 06:21:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:03,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:03,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:03,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722637981] [2023-11-29 06:21:03,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722637981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:03,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308679524] [2023-11-29 06:21:03,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:21:03,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:03,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:03,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:21:04,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:21:04,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:21:04,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:21:04,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:04,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:04,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308679524] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:04,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:04,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2023-11-29 06:21:04,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748021530] [2023-11-29 06:21:04,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:04,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:21:04,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:04,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:21:04,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:21:04,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2023-11-29 06:21:04,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 51 transitions, 175 flow. Second operand has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 9 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:04,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:04,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2023-11-29 06:21:04,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:06,483 INFO L124 PetriNetUnfolderBase]: 14079/18456 cut-off events. [2023-11-29 06:21:06,483 INFO L125 PetriNetUnfolderBase]: For 6092/6092 co-relation queries the response was YES. [2023-11-29 06:21:06,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47695 conditions, 18456 events. 14079/18456 cut-off events. For 6092/6092 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 92832 event pairs, 1251 based on Foata normal form. 300/18754 useless extension candidates. Maximal degree in co-relation 26846. Up to 4047 conditions per place. [2023-11-29 06:21:06,608 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 246 selfloop transitions, 36 changer transitions 0/285 dead transitions. [2023-11-29 06:21:06,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 285 transitions, 1419 flow [2023-11-29 06:21:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:21:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:21:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 352 transitions. [2023-11-29 06:21:06,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584717607973422 [2023-11-29 06:21:06,613 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 352 transitions. [2023-11-29 06:21:06,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 352 transitions. [2023-11-29 06:21:06,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:06,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 352 transitions. [2023-11-29 06:21:06,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 25.142857142857142) internal successors, (352), 14 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:06,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 43.0) internal successors, (645), 15 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:06,621 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 43.0) internal successors, (645), 15 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:06,621 INFO L175 Difference]: Start difference. First operand has 48 places, 51 transitions, 175 flow. Second operand 14 states and 352 transitions. [2023-11-29 06:21:06,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 285 transitions, 1419 flow [2023-11-29 06:21:06,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 285 transitions, 1419 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:21:06,641 INFO L231 Difference]: Finished difference. Result has 67 places, 79 transitions, 411 flow [2023-11-29 06:21:06,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=411, PETRI_PLACES=67, PETRI_TRANSITIONS=79} [2023-11-29 06:21:06,643 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 20 predicate places. [2023-11-29 06:21:06,643 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 79 transitions, 411 flow [2023-11-29 06:21:06,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 9 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:06,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:06,643 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, 1, 1, 1, 1] [2023-11-29 06:21:06,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:21:06,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:06,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:06,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1826101636, now seen corresponding path program 1 times [2023-11-29 06:21:06,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:06,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394767616] [2023-11-29 06:21:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:06,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:06,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:06,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394767616] [2023-11-29 06:21:06,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394767616] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:06,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:06,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:21:06,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101627289] [2023-11-29 06:21:06,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:06,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:21:06,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:06,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:21:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:21:06,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:21:06,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 411 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:06,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:06,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:21:06,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:07,801 INFO L124 PetriNetUnfolderBase]: 8968/12348 cut-off events. [2023-11-29 06:21:07,801 INFO L125 PetriNetUnfolderBase]: For 16599/16695 co-relation queries the response was YES. [2023-11-29 06:21:07,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37708 conditions, 12348 events. 8968/12348 cut-off events. For 16599/16695 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 64882 event pairs, 3027 based on Foata normal form. 441/12626 useless extension candidates. Maximal degree in co-relation 32708. Up to 7212 conditions per place. [2023-11-29 06:21:07,919 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 90 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2023-11-29 06:21:07,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 706 flow [2023-11-29 06:21:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:21:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:21:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-29 06:21:07,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6821705426356589 [2023-11-29 06:21:07,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-29 06:21:07,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-29 06:21:07,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:07,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-29 06:21:07,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,923 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:07,923 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 411 flow. Second operand 3 states and 88 transitions. [2023-11-29 06:21:07,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 706 flow [2023-11-29 06:21:08,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 107 transitions, 674 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:08,127 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 395 flow [2023-11-29 06:21:08,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=395, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2023-11-29 06:21:08,128 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2023-11-29 06:21:08,129 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 395 flow [2023-11-29 06:21:08,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:08,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:08,129 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, 1, 1, 1, 1] [2023-11-29 06:21:08,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 06:21:08,129 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:08,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:08,130 INFO L85 PathProgramCache]: Analyzing trace with hash 260483653, now seen corresponding path program 1 times [2023-11-29 06:21:08,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:08,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124134914] [2023-11-29 06:21:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:08,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:08,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:08,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124134914] [2023-11-29 06:21:08,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124134914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:08,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:08,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:21:08,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471073853] [2023-11-29 06:21:08,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:08,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:21:08,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:08,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:21:08,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:21:08,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2023-11-29 06:21:08,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 395 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 06:21:08,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:08,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2023-11-29 06:21:08,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:09,607 INFO L124 PetriNetUnfolderBase]: 10557/14284 cut-off events. [2023-11-29 06:21:09,607 INFO L125 PetriNetUnfolderBase]: For 15061/15061 co-relation queries the response was YES. [2023-11-29 06:21:09,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43477 conditions, 14284 events. 10557/14284 cut-off events. For 15061/15061 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 74369 event pairs, 3182 based on Foata normal form. 90/14352 useless extension candidates. Maximal degree in co-relation 37711. Up to 6764 conditions per place. [2023-11-29 06:21:09,664 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 120 selfloop transitions, 15 changer transitions 0/141 dead transitions. [2023-11-29 06:21:09,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 141 transitions, 852 flow [2023-11-29 06:21:09,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:21:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:21:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2023-11-29 06:21:09,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641860465116279 [2023-11-29 06:21:09,665 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 138 transitions. [2023-11-29 06:21:09,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 138 transitions. [2023-11-29 06:21:09,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:09,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 138 transitions. [2023-11-29 06:21:09,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:09,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:09,666 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:09,666 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 395 flow. Second operand 5 states and 138 transitions. [2023-11-29 06:21:09,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 141 transitions, 852 flow [2023-11-29 06:21:09,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 141 transitions, 849 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:09,745 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 449 flow [2023-11-29 06:21:09,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2023-11-29 06:21:09,746 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 27 predicate places. [2023-11-29 06:21:09,746 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 449 flow [2023-11-29 06:21:09,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 06:21:09,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:09,746 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, 1, 1, 1, 1] [2023-11-29 06:21:09,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 06:21:09,746 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:09,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:09,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1816905829, now seen corresponding path program 2 times [2023-11-29 06:21:09,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:09,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567339561] [2023-11-29 06:21:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:09,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:09,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:09,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567339561] [2023-11-29 06:21:09,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567339561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:09,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31464762] [2023-11-29 06:21:09,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:21:09,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:09,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:09,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:09,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:21:09,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:21:09,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:21:09,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:21:09,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:10,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:10,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31464762] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:10,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:10,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2023-11-29 06:21:10,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690511846] [2023-11-29 06:21:10,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:10,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:21:10,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:10,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:21:10,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:21:10,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2023-11-29 06:21:10,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 449 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:10,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:10,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2023-11-29 06:21:10,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:12,149 INFO L124 PetriNetUnfolderBase]: 18657/24760 cut-off events. [2023-11-29 06:21:12,149 INFO L125 PetriNetUnfolderBase]: For 33947/33947 co-relation queries the response was YES. [2023-11-29 06:21:12,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78012 conditions, 24760 events. 18657/24760 cut-off events. For 33947/33947 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 129113 event pairs, 1235 based on Foata normal form. 192/24951 useless extension candidates. Maximal degree in co-relation 68232. Up to 4899 conditions per place. [2023-11-29 06:21:12,283 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 253 selfloop transitions, 74 changer transitions 0/330 dead transitions. [2023-11-29 06:21:12,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 330 transitions, 2111 flow [2023-11-29 06:21:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:21:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:21:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 340 transitions. [2023-11-29 06:21:12,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5647840531561462 [2023-11-29 06:21:12,286 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 340 transitions. [2023-11-29 06:21:12,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 340 transitions. [2023-11-29 06:21:12,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:12,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 340 transitions. [2023-11-29 06:21:12,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 24.285714285714285) internal successors, (340), 14 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:12,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 43.0) internal successors, (645), 15 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:12,289 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 43.0) internal successors, (645), 15 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:12,289 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 449 flow. Second operand 14 states and 340 transitions. [2023-11-29 06:21:12,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 330 transitions, 2111 flow [2023-11-29 06:21:12,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 330 transitions, 2054 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 06:21:12,809 INFO L231 Difference]: Finished difference. Result has 94 places, 130 transitions, 1045 flow [2023-11-29 06:21:12,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1045, PETRI_PLACES=94, PETRI_TRANSITIONS=130} [2023-11-29 06:21:12,810 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 47 predicate places. [2023-11-29 06:21:12,810 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 130 transitions, 1045 flow [2023-11-29 06:21:12,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:12,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:12,811 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, 1, 1, 1, 1] [2023-11-29 06:21:12,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:21:13,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:21:13,012 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:13,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:13,012 INFO L85 PathProgramCache]: Analyzing trace with hash 413319446, now seen corresponding path program 1 times [2023-11-29 06:21:13,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:13,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327865138] [2023-11-29 06:21:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:13,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:13,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:13,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327865138] [2023-11-29 06:21:13,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327865138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:13,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:13,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:21:13,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935035063] [2023-11-29 06:21:13,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:13,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:21:13,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:13,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:21:13,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:21:13,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:21:13,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 130 transitions, 1045 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:13,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:13,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:21:13,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:14,544 INFO L124 PetriNetUnfolderBase]: 11915/16608 cut-off events. [2023-11-29 06:21:14,544 INFO L125 PetriNetUnfolderBase]: For 47041/47571 co-relation queries the response was YES. [2023-11-29 06:21:14,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61062 conditions, 16608 events. 11915/16608 cut-off events. For 47041/47571 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 92180 event pairs, 3003 based on Foata normal form. 562/17043 useless extension candidates. Maximal degree in co-relation 53269. Up to 10017 conditions per place. [2023-11-29 06:21:14,638 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 121 selfloop transitions, 3 changer transitions 4/160 dead transitions. [2023-11-29 06:21:14,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 160 transitions, 1471 flow [2023-11-29 06:21:14,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:21:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:21:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-29 06:21:14,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6511627906976745 [2023-11-29 06:21:14,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-29 06:21:14,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-29 06:21:14,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:14,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-29 06:21:14,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:14,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:14,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:14,641 INFO L175 Difference]: Start difference. First operand has 94 places, 130 transitions, 1045 flow. Second operand 3 states and 84 transitions. [2023-11-29 06:21:14,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 160 transitions, 1471 flow [2023-11-29 06:21:15,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 160 transitions, 1417 flow, removed 27 selfloop flow, removed 0 redundant places. [2023-11-29 06:21:15,273 INFO L231 Difference]: Finished difference. Result has 97 places, 126 transitions, 965 flow [2023-11-29 06:21:15,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=965, PETRI_PLACES=97, PETRI_TRANSITIONS=126} [2023-11-29 06:21:15,274 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 50 predicate places. [2023-11-29 06:21:15,274 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 126 transitions, 965 flow [2023-11-29 06:21:15,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:15,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:15,274 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, 1, 1, 1, 1] [2023-11-29 06:21:15,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:21:15,274 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:15,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1127584431, now seen corresponding path program 3 times [2023-11-29 06:21:15,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:15,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848534378] [2023-11-29 06:21:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:15,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:15,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:15,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848534378] [2023-11-29 06:21:15,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848534378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:15,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:15,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:21:15,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290155338] [2023-11-29 06:21:15,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:15,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:21:15,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:21:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:21:15,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2023-11-29 06:21:15,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 126 transitions, 965 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 06:21:15,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:15,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2023-11-29 06:21:15,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:17,082 INFO L124 PetriNetUnfolderBase]: 13322/18465 cut-off events. [2023-11-29 06:21:17,082 INFO L125 PetriNetUnfolderBase]: For 46287/46390 co-relation queries the response was YES. [2023-11-29 06:21:17,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67650 conditions, 18465 events. 13322/18465 cut-off events. For 46287/46390 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 101798 event pairs, 4484 based on Foata normal form. 39/18433 useless extension candidates. Maximal degree in co-relation 62206. Up to 10419 conditions per place. [2023-11-29 06:21:17,194 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 129 selfloop transitions, 32 changer transitions 2/181 dead transitions. [2023-11-29 06:21:17,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 181 transitions, 1557 flow [2023-11-29 06:21:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:21:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:21:17,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2023-11-29 06:21:17,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5953488372093023 [2023-11-29 06:21:17,196 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 128 transitions. [2023-11-29 06:21:17,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 128 transitions. [2023-11-29 06:21:17,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:17,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 128 transitions. [2023-11-29 06:21:17,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:17,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:17,198 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:17,198 INFO L175 Difference]: Start difference. First operand has 97 places, 126 transitions, 965 flow. Second operand 5 states and 128 transitions. [2023-11-29 06:21:17,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 181 transitions, 1557 flow [2023-11-29 06:21:17,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 181 transitions, 1512 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-29 06:21:17,812 INFO L231 Difference]: Finished difference. Result has 99 places, 131 transitions, 1096 flow [2023-11-29 06:21:17,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1096, PETRI_PLACES=99, PETRI_TRANSITIONS=131} [2023-11-29 06:21:17,813 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 52 predicate places. [2023-11-29 06:21:17,813 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 131 transitions, 1096 flow [2023-11-29 06:21:17,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 06:21:17,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:17,813 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, 1, 1, 1, 1] [2023-11-29 06:21:17,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 06:21:17,814 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:17,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:17,814 INFO L85 PathProgramCache]: Analyzing trace with hash 711082719, now seen corresponding path program 4 times [2023-11-29 06:21:17,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:17,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144438046] [2023-11-29 06:21:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:17,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:17,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:17,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144438046] [2023-11-29 06:21:17,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144438046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:17,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:17,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:21:17,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186330475] [2023-11-29 06:21:17,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:17,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:21:17,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:17,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:21:17,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:21:17,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2023-11-29 06:21:17,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 131 transitions, 1096 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 06:21:17,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:17,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2023-11-29 06:21:17,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:19,624 INFO L124 PetriNetUnfolderBase]: 13120/18105 cut-off events. [2023-11-29 06:21:19,624 INFO L125 PetriNetUnfolderBase]: For 52756/52773 co-relation queries the response was YES. [2023-11-29 06:21:19,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68447 conditions, 18105 events. 13120/18105 cut-off events. For 52756/52773 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 98837 event pairs, 3919 based on Foata normal form. 39/18073 useless extension candidates. Maximal degree in co-relation 63250. Up to 8993 conditions per place. [2023-11-29 06:21:19,782 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 132 selfloop transitions, 24 changer transitions 9/183 dead transitions. [2023-11-29 06:21:19,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 183 transitions, 1626 flow [2023-11-29 06:21:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:21:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:21:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2023-11-29 06:21:19,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5953488372093023 [2023-11-29 06:21:19,783 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 128 transitions. [2023-11-29 06:21:19,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 128 transitions. [2023-11-29 06:21:19,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:19,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 128 transitions. [2023-11-29 06:21:19,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:19,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:19,785 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:19,785 INFO L175 Difference]: Start difference. First operand has 99 places, 131 transitions, 1096 flow. Second operand 5 states and 128 transitions. [2023-11-29 06:21:19,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 183 transitions, 1626 flow [2023-11-29 06:21:20,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 183 transitions, 1578 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-29 06:21:20,516 INFO L231 Difference]: Finished difference. Result has 104 places, 131 transitions, 1108 flow [2023-11-29 06:21:20,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1108, PETRI_PLACES=104, PETRI_TRANSITIONS=131} [2023-11-29 06:21:20,517 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 57 predicate places. [2023-11-29 06:21:20,517 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 131 transitions, 1108 flow [2023-11-29 06:21:20,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 06:21:20,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:20,517 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, 1, 1, 1, 1] [2023-11-29 06:21:20,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 06:21:20,518 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:20,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:20,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1736635187, now seen corresponding path program 3 times [2023-11-29 06:21:20,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:20,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904386139] [2023-11-29 06:21:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:20,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:20,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:20,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904386139] [2023-11-29 06:21:20,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904386139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:20,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:20,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:21:20,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958516069] [2023-11-29 06:21:20,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:20,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:21:20,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:20,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:21:20,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:21:20,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2023-11-29 06:21:20,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 131 transitions, 1108 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:20,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:20,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2023-11-29 06:21:20,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:22,476 INFO L124 PetriNetUnfolderBase]: 14956/20042 cut-off events. [2023-11-29 06:21:22,476 INFO L125 PetriNetUnfolderBase]: For 58492/58510 co-relation queries the response was YES. [2023-11-29 06:21:22,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74126 conditions, 20042 events. 14956/20042 cut-off events. For 58492/58510 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 101856 event pairs, 5775 based on Foata normal form. 236/20277 useless extension candidates. Maximal degree in co-relation 71248. Up to 12430 conditions per place. [2023-11-29 06:21:22,602 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 151 selfloop transitions, 42 changer transitions 0/196 dead transitions. [2023-11-29 06:21:22,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 196 transitions, 1745 flow [2023-11-29 06:21:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:21:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:21:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2023-11-29 06:21:22,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2023-11-29 06:21:22,604 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 150 transitions. [2023-11-29 06:21:22,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 150 transitions. [2023-11-29 06:21:22,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:22,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 150 transitions. [2023-11-29 06:21:22,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.0) internal successors, (150), 6 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 06:21:22,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 43.0) internal successors, (301), 7 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:22,606 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 43.0) internal successors, (301), 7 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:22,606 INFO L175 Difference]: Start difference. First operand has 104 places, 131 transitions, 1108 flow. Second operand 6 states and 150 transitions. [2023-11-29 06:21:22,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 196 transitions, 1745 flow [2023-11-29 06:21:23,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 196 transitions, 1694 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-29 06:21:23,188 INFO L231 Difference]: Finished difference. Result has 105 places, 134 transitions, 1194 flow [2023-11-29 06:21:23,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1194, PETRI_PLACES=105, PETRI_TRANSITIONS=134} [2023-11-29 06:21:23,189 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 58 predicate places. [2023-11-29 06:21:23,189 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 134 transitions, 1194 flow [2023-11-29 06:21:23,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:23,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:23,189 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, 1, 1, 1, 1] [2023-11-29 06:21:23,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 06:21:23,190 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:23,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:23,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1619674083, now seen corresponding path program 5 times [2023-11-29 06:21:23,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:23,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364245392] [2023-11-29 06:21:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:23,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:23,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:23,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364245392] [2023-11-29 06:21:23,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364245392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:23,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586592993] [2023-11-29 06:21:23,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:21:23,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:23,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:23,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:23,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:21:23,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:21:23,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:21:23,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:21:23,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:23,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:23,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586592993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:23,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:23,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-11-29 06:21:23,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823670542] [2023-11-29 06:21:23,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:23,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 06:21:23,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:23,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 06:21:23,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:21:23,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2023-11-29 06:21:23,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 134 transitions, 1194 flow. Second operand has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 11 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:23,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:23,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2023-11-29 06:21:23,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:26,246 INFO L124 PetriNetUnfolderBase]: 19294/25722 cut-off events. [2023-11-29 06:21:26,246 INFO L125 PetriNetUnfolderBase]: For 64317/64317 co-relation queries the response was YES. [2023-11-29 06:21:26,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95724 conditions, 25722 events. 19294/25722 cut-off events. For 64317/64317 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 134771 event pairs, 1715 based on Foata normal form. 158/25879 useless extension candidates. Maximal degree in co-relation 92624. Up to 4782 conditions per place. [2023-11-29 06:21:26,385 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 266 selfloop transitions, 85 changer transitions 0/354 dead transitions. [2023-11-29 06:21:26,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 354 transitions, 2799 flow [2023-11-29 06:21:26,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:21:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 06:21:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 366 transitions. [2023-11-29 06:21:26,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674418604651162 [2023-11-29 06:21:26,387 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 366 transitions. [2023-11-29 06:21:26,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 366 transitions. [2023-11-29 06:21:26,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:26,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 366 transitions. [2023-11-29 06:21:26,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 24.4) internal successors, (366), 15 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:26,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 43.0) internal successors, (688), 16 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:26,390 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 43.0) internal successors, (688), 16 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:26,391 INFO L175 Difference]: Start difference. First operand has 105 places, 134 transitions, 1194 flow. Second operand 15 states and 366 transitions. [2023-11-29 06:21:26,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 354 transitions, 2799 flow [2023-11-29 06:21:27,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 354 transitions, 2737 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:21:27,160 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 1629 flow [2023-11-29 06:21:27,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1629, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2023-11-29 06:21:27,160 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 76 predicate places. [2023-11-29 06:21:27,161 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 1629 flow [2023-11-29 06:21:27,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.090909090909092) internal successors, (122), 11 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:27,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:27,161 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, 1, 1, 1, 1] [2023-11-29 06:21:27,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:21:27,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:21:27,362 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:27,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:27,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1237117401, now seen corresponding path program 4 times [2023-11-29 06:21:27,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:27,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094806237] [2023-11-29 06:21:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:27,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:27,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:27,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094806237] [2023-11-29 06:21:27,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094806237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:27,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:27,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:21:27,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52180852] [2023-11-29 06:21:27,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:27,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:21:27,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:21:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:21:27,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2023-11-29 06:21:27,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 1629 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 06:21:27,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:27,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2023-11-29 06:21:27,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:30,021 INFO L124 PetriNetUnfolderBase]: 17861/24241 cut-off events. [2023-11-29 06:21:30,021 INFO L125 PetriNetUnfolderBase]: For 99204/99488 co-relation queries the response was YES. [2023-11-29 06:21:30,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97795 conditions, 24241 events. 17861/24241 cut-off events. For 99204/99488 co-relation queries the response was YES. Maximal size of possible extension queue 1014. Compared 133566 event pairs, 7345 based on Foata normal form. 122/24252 useless extension candidates. Maximal degree in co-relation 92009. Up to 16946 conditions per place. [2023-11-29 06:21:30,173 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 137 selfloop transitions, 30 changer transitions 13/204 dead transitions. [2023-11-29 06:21:30,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 204 transitions, 2161 flow [2023-11-29 06:21:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:21:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:21:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2023-11-29 06:21:30,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906976744186047 [2023-11-29 06:21:30,174 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 127 transitions. [2023-11-29 06:21:30,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 127 transitions. [2023-11-29 06:21:30,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:30,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 127 transitions. [2023-11-29 06:21:30,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:30,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:30,175 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:30,175 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 1629 flow. Second operand 5 states and 127 transitions. [2023-11-29 06:21:30,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 204 transitions, 2161 flow [2023-11-29 06:21:31,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 204 transitions, 2133 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-29 06:21:31,211 INFO L231 Difference]: Finished difference. Result has 126 places, 156 transitions, 1652 flow [2023-11-29 06:21:31,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1652, PETRI_PLACES=126, PETRI_TRANSITIONS=156} [2023-11-29 06:21:31,212 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 79 predicate places. [2023-11-29 06:21:31,212 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 156 transitions, 1652 flow [2023-11-29 06:21:31,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 06:21:31,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:31,212 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, 1, 1, 1, 1] [2023-11-29 06:21:31,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 06:21:31,213 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:31,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash -616716371, now seen corresponding path program 5 times [2023-11-29 06:21:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:31,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134312303] [2023-11-29 06:21:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:31,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:31,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:31,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134312303] [2023-11-29 06:21:31,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134312303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:31,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:31,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:21:31,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554122577] [2023-11-29 06:21:31,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:31,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:21:31,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:21:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:21:31,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2023-11-29 06:21:31,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 156 transitions, 1652 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:31,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:31,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2023-11-29 06:21:31,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:34,140 INFO L124 PetriNetUnfolderBase]: 20753/27752 cut-off events. [2023-11-29 06:21:34,141 INFO L125 PetriNetUnfolderBase]: For 109138/109140 co-relation queries the response was YES. [2023-11-29 06:21:34,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110627 conditions, 27752 events. 20753/27752 cut-off events. For 109138/109140 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 147612 event pairs, 5519 based on Foata normal form. 230/27982 useless extension candidates. Maximal degree in co-relation 106775. Up to 11718 conditions per place. [2023-11-29 06:21:34,311 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 174 selfloop transitions, 46 changer transitions 1/224 dead transitions. [2023-11-29 06:21:34,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 224 transitions, 2398 flow [2023-11-29 06:21:34,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:21:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:21:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2023-11-29 06:21:34,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2023-11-29 06:21:34,312 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 153 transitions. [2023-11-29 06:21:34,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 153 transitions. [2023-11-29 06:21:34,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:34,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 153 transitions. [2023-11-29 06:21:34,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:34,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 43.0) internal successors, (301), 7 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:34,314 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 43.0) internal successors, (301), 7 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:34,314 INFO L175 Difference]: Start difference. First operand has 126 places, 156 transitions, 1652 flow. Second operand 6 states and 153 transitions. [2023-11-29 06:21:34,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 224 transitions, 2398 flow [2023-11-29 06:21:36,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 224 transitions, 2314 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-29 06:21:36,107 INFO L231 Difference]: Finished difference. Result has 126 places, 158 transitions, 1710 flow [2023-11-29 06:21:36,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1710, PETRI_PLACES=126, PETRI_TRANSITIONS=158} [2023-11-29 06:21:36,108 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 79 predicate places. [2023-11-29 06:21:36,108 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 158 transitions, 1710 flow [2023-11-29 06:21:36,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:36,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:36,109 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, 1, 1, 1, 1] [2023-11-29 06:21:36,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 06:21:36,109 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:36,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:36,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1665631269, now seen corresponding path program 6 times [2023-11-29 06:21:36,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:36,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058382063] [2023-11-29 06:21:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:36,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:36,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:36,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058382063] [2023-11-29 06:21:36,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058382063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:36,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:36,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:21:36,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316606756] [2023-11-29 06:21:36,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:36,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:21:36,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:36,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:21:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:21:36,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2023-11-29 06:21:36,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 158 transitions, 1710 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:36,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:36,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2023-11-29 06:21:36,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:38,873 INFO L124 PetriNetUnfolderBase]: 20192/26976 cut-off events. [2023-11-29 06:21:38,873 INFO L125 PetriNetUnfolderBase]: For 109132/109132 co-relation queries the response was YES. [2023-11-29 06:21:38,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107842 conditions, 26976 events. 20192/26976 cut-off events. For 109132/109132 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 143718 event pairs, 5978 based on Foata normal form. 158/27132 useless extension candidates. Maximal degree in co-relation 104794. Up to 13657 conditions per place. [2023-11-29 06:21:39,102 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 163 selfloop transitions, 50 changer transitions 1/217 dead transitions. [2023-11-29 06:21:39,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 217 transitions, 2341 flow [2023-11-29 06:21:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:21:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:21:39,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2023-11-29 06:21:39,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2023-11-29 06:21:39,103 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 148 transitions. [2023-11-29 06:21:39,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 148 transitions. [2023-11-29 06:21:39,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:39,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 148 transitions. [2023-11-29 06:21:39,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:39,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 43.0) internal successors, (301), 7 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:39,105 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 43.0) internal successors, (301), 7 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:39,105 INFO L175 Difference]: Start difference. First operand has 126 places, 158 transitions, 1710 flow. Second operand 6 states and 148 transitions. [2023-11-29 06:21:39,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 217 transitions, 2341 flow [2023-11-29 06:21:40,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 217 transitions, 2236 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-29 06:21:40,764 INFO L231 Difference]: Finished difference. Result has 124 places, 156 transitions, 1669 flow [2023-11-29 06:21:40,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1669, PETRI_PLACES=124, PETRI_TRANSITIONS=156} [2023-11-29 06:21:40,765 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 77 predicate places. [2023-11-29 06:21:40,765 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 156 transitions, 1669 flow [2023-11-29 06:21:40,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:40,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:40,765 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, 1, 1, 1, 1] [2023-11-29 06:21:40,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 06:21:40,766 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:40,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:40,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1634101919, now seen corresponding path program 6 times [2023-11-29 06:21:40,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:40,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327461729] [2023-11-29 06:21:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:40,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:21:40,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:40,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327461729] [2023-11-29 06:21:40,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327461729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:21:40,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:21:40,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:21:40,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999288014] [2023-11-29 06:21:40,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:40,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:21:40,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:21:40,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:21:40,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2023-11-29 06:21:40,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 156 transitions, 1669 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 06:21:40,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:40,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2023-11-29 06:21:40,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:43,209 INFO L124 PetriNetUnfolderBase]: 17581/23721 cut-off events. [2023-11-29 06:21:43,210 INFO L125 PetriNetUnfolderBase]: For 99243/99577 co-relation queries the response was YES. [2023-11-29 06:21:43,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95450 conditions, 23721 events. 17581/23721 cut-off events. For 99243/99577 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 128336 event pairs, 5292 based on Foata normal form. 96/23691 useless extension candidates. Maximal degree in co-relation 89907. Up to 11736 conditions per place. [2023-11-29 06:21:43,374 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 131 selfloop transitions, 34 changer transitions 12/202 dead transitions. [2023-11-29 06:21:43,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 202 transitions, 2180 flow [2023-11-29 06:21:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:21:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:21:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2023-11-29 06:21:43,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2023-11-29 06:21:43,376 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 125 transitions. [2023-11-29 06:21:43,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 125 transitions. [2023-11-29 06:21:43,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:43,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 125 transitions. [2023-11-29 06:21:43,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:43,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:43,377 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:43,377 INFO L175 Difference]: Start difference. First operand has 124 places, 156 transitions, 1669 flow. Second operand 5 states and 125 transitions. [2023-11-29 06:21:43,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 202 transitions, 2180 flow [2023-11-29 06:21:44,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 202 transitions, 1996 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-11-29 06:21:44,832 INFO L231 Difference]: Finished difference. Result has 117 places, 155 transitions, 1539 flow [2023-11-29 06:21:44,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1539, PETRI_PLACES=117, PETRI_TRANSITIONS=155} [2023-11-29 06:21:44,832 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 70 predicate places. [2023-11-29 06:21:44,832 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 155 transitions, 1539 flow [2023-11-29 06:21:44,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 06:21:44,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:44,833 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:44,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 06:21:44,833 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:44,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:44,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1072002265, now seen corresponding path program 1 times [2023-11-29 06:21:44,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:44,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836189287] [2023-11-29 06:21:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:44,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:45,029 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 06:21:45,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:45,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836189287] [2023-11-29 06:21:45,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836189287] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:45,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206931374] [2023-11-29 06:21:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:45,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:45,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:45,034 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:45,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:21:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:45,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:21:45,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:45,279 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 06:21:45,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:21:45,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206931374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:45,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:45,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2023-11-29 06:21:45,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873634034] [2023-11-29 06:21:45,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:45,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:21:45,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:45,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:21:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:21:45,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:21:45,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 155 transitions, 1539 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:45,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:45,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:21:45,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:21:50,750 INFO L124 PetriNetUnfolderBase]: 40735/57096 cut-off events. [2023-11-29 06:21:50,750 INFO L125 PetriNetUnfolderBase]: For 227036/228436 co-relation queries the response was YES. [2023-11-29 06:21:50,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215550 conditions, 57096 events. 40735/57096 cut-off events. For 227036/228436 co-relation queries the response was YES. Maximal size of possible extension queue 1856. Compared 364118 event pairs, 4016 based on Foata normal form. 2091/59033 useless extension candidates. Maximal degree in co-relation 187939. Up to 20636 conditions per place. [2023-11-29 06:21:51,306 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 406 selfloop transitions, 22 changer transitions 5/481 dead transitions. [2023-11-29 06:21:51,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 481 transitions, 5248 flow [2023-11-29 06:21:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:21:51,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:21:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 232 transitions. [2023-11-29 06:21:51,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.770764119601329 [2023-11-29 06:21:51,308 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 232 transitions. [2023-11-29 06:21:51,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 232 transitions. [2023-11-29 06:21:51,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:21:51,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 232 transitions. [2023-11-29 06:21:51,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:51,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 43.0) internal successors, (344), 8 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:51,310 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 43.0) internal successors, (344), 8 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:51,310 INFO L175 Difference]: Start difference. First operand has 117 places, 155 transitions, 1539 flow. Second operand 7 states and 232 transitions. [2023-11-29 06:21:51,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 481 transitions, 5248 flow [2023-11-29 06:21:56,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 481 transitions, 4974 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-29 06:21:56,018 INFO L231 Difference]: Finished difference. Result has 120 places, 174 transitions, 1662 flow [2023-11-29 06:21:56,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1662, PETRI_PLACES=120, PETRI_TRANSITIONS=174} [2023-11-29 06:21:56,018 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 73 predicate places. [2023-11-29 06:21:56,018 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 174 transitions, 1662 flow [2023-11-29 06:21:56,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:56,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:21:56,019 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:56,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:21:56,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:21:56,219 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:21:56,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:56,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1157416571, now seen corresponding path program 2 times [2023-11-29 06:21:56,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:56,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576860121] [2023-11-29 06:21:56,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:56,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:56,334 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 06:21:56,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:56,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576860121] [2023-11-29 06:21:56,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576860121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:56,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548061679] [2023-11-29 06:21:56,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:21:56,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:56,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:56,336 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:56,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:21:56,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:21:56,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:21:56,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:21:56,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:56,566 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 06:21:56,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:21:56,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548061679] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:56,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:21:56,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 06:21:56,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922617310] [2023-11-29 06:21:56,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:56,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:21:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:56,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:21:56,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:21:56,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2023-11-29 06:21:56,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 174 transitions, 1662 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:21:56,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:21:56,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2023-11-29 06:21:56,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:04,245 INFO L124 PetriNetUnfolderBase]: 55969/78439 cut-off events. [2023-11-29 06:22:04,245 INFO L125 PetriNetUnfolderBase]: For 310301/311736 co-relation queries the response was YES. [2023-11-29 06:22:04,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307436 conditions, 78439 events. 55969/78439 cut-off events. For 310301/311736 co-relation queries the response was YES. Maximal size of possible extension queue 2775. Compared 521728 event pairs, 10611 based on Foata normal form. 663/78944 useless extension candidates. Maximal degree in co-relation 276778. Up to 53593 conditions per place. [2023-11-29 06:22:04,950 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 264 selfloop transitions, 13 changer transitions 1/326 dead transitions. [2023-11-29 06:22:04,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 326 transitions, 3594 flow [2023-11-29 06:22:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:22:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:22:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2023-11-29 06:22:04,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7325581395348837 [2023-11-29 06:22:04,951 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 126 transitions. [2023-11-29 06:22:04,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 126 transitions. [2023-11-29 06:22:04,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:04,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 126 transitions. [2023-11-29 06:22:04,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:04,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:04,953 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:04,953 INFO L175 Difference]: Start difference. First operand has 120 places, 174 transitions, 1662 flow. Second operand 4 states and 126 transitions. [2023-11-29 06:22:04,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 326 transitions, 3594 flow [2023-11-29 06:22:13,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 326 transitions, 3534 flow, removed 30 selfloop flow, removed 0 redundant places. [2023-11-29 06:22:13,716 INFO L231 Difference]: Finished difference. Result has 124 places, 184 transitions, 1727 flow [2023-11-29 06:22:13,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1602, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1727, PETRI_PLACES=124, PETRI_TRANSITIONS=184} [2023-11-29 06:22:13,717 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 77 predicate places. [2023-11-29 06:22:13,717 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 184 transitions, 1727 flow [2023-11-29 06:22:13,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:13,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:22:13,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:13,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:22:13,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:22:13,918 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:22:13,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:13,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1450777964, now seen corresponding path program 1 times [2023-11-29 06:22:13,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:13,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212573699] [2023-11-29 06:22:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:13,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:22:13,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:13,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212573699] [2023-11-29 06:22:13,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212573699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:22:13,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:22:13,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:22:13,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170911886] [2023-11-29 06:22:13,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:13,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:22:13,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:22:13,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:22:13,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2023-11-29 06:22:13,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 184 transitions, 1727 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:13,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:22:13,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2023-11-29 06:22:13,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:22:30,643 INFO L124 PetriNetUnfolderBase]: 122055/166990 cut-off events. [2023-11-29 06:22:30,643 INFO L125 PetriNetUnfolderBase]: For 669856/672640 co-relation queries the response was YES. [2023-11-29 06:22:31,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640589 conditions, 166990 events. 122055/166990 cut-off events. For 669856/672640 co-relation queries the response was YES. Maximal size of possible extension queue 5204. Compared 1146385 event pairs, 32455 based on Foata normal form. 1333/159037 useless extension candidates. Maximal degree in co-relation 581255. Up to 90543 conditions per place. [2023-11-29 06:22:31,874 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 483 selfloop transitions, 10 changer transitions 0/540 dead transitions. [2023-11-29 06:22:31,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 540 transitions, 6179 flow [2023-11-29 06:22:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:22:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:22:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2023-11-29 06:22:31,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2023-11-29 06:22:31,875 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 130 transitions. [2023-11-29 06:22:31,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 130 transitions. [2023-11-29 06:22:31,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:22:31,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 130 transitions. [2023-11-29 06:22:31,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.0) internal successors, (130), 5 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 06:22:31,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:31,877 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:22:31,877 INFO L175 Difference]: Start difference. First operand has 124 places, 184 transitions, 1727 flow. Second operand 5 states and 130 transitions. [2023-11-29 06:22:31,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 540 transitions, 6179 flow [2023-11-29 06:23:00,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 540 transitions, 6097 flow, removed 41 selfloop flow, removed 0 redundant places. [2023-11-29 06:23:00,274 INFO L231 Difference]: Finished difference. Result has 131 places, 193 transitions, 1768 flow [2023-11-29 06:23:00,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1768, PETRI_PLACES=131, PETRI_TRANSITIONS=193} [2023-11-29 06:23:00,275 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 84 predicate places. [2023-11-29 06:23:00,275 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 193 transitions, 1768 flow [2023-11-29 06:23:00,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:00,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:23:00,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:23:00,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 06:23:00,276 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:23:00,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:23:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1287506476, now seen corresponding path program 2 times [2023-11-29 06:23:00,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:23:00,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965918912] [2023-11-29 06:23:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:23:00,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:23:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:23:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:23:00,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:23:00,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965918912] [2023-11-29 06:23:00,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965918912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:23:00,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:23:00,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:23:00,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925140067] [2023-11-29 06:23:00,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:23:00,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:23:00,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:23:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:23:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:23:00,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2023-11-29 06:23:00,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 193 transitions, 1768 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:00,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:23:00,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2023-11-29 06:23:00,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:23:24,580 INFO L124 PetriNetUnfolderBase]: 162294/222219 cut-off events. [2023-11-29 06:23:24,580 INFO L125 PetriNetUnfolderBase]: For 951944/955072 co-relation queries the response was YES. [2023-11-29 06:23:25,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915883 conditions, 222219 events. 162294/222219 cut-off events. For 951944/955072 co-relation queries the response was YES. Maximal size of possible extension queue 6081. Compared 1568507 event pairs, 40710 based on Foata normal form. 2712/224225 useless extension candidates. Maximal degree in co-relation 799876. Up to 108938 conditions per place. [2023-11-29 06:23:26,666 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 484 selfloop transitions, 8 changer transitions 0/539 dead transitions. [2023-11-29 06:23:26,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 539 transitions, 6092 flow [2023-11-29 06:23:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:23:26,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:23:26,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2023-11-29 06:23:26,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2023-11-29 06:23:26,668 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 132 transitions. [2023-11-29 06:23:26,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 132 transitions. [2023-11-29 06:23:26,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:23:26,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 132 transitions. [2023-11-29 06:23:26,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:26,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:26,670 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 43.0) internal successors, (258), 6 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:23:26,670 INFO L175 Difference]: Start difference. First operand has 131 places, 193 transitions, 1768 flow. Second operand 5 states and 132 transitions. [2023-11-29 06:23:26,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 539 transitions, 6092 flow [2023-11-29 06:24:02,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 539 transitions, 6092 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 06:24:02,015 INFO L231 Difference]: Finished difference. Result has 138 places, 197 transitions, 1824 flow [2023-11-29 06:24:02,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1824, PETRI_PLACES=138, PETRI_TRANSITIONS=197} [2023-11-29 06:24:02,015 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 91 predicate places. [2023-11-29 06:24:02,015 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 197 transitions, 1824 flow [2023-11-29 06:24:02,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:02,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:24:02,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:24:02,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 06:24:02,016 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:24:02,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:24:02,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1270695002, now seen corresponding path program 3 times [2023-11-29 06:24:02,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:24:02,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878342914] [2023-11-29 06:24:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:24:02,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:24:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:24:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:24:02,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:24:02,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878342914] [2023-11-29 06:24:02,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878342914] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:24:02,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782596879] [2023-11-29 06:24:02,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:24:02,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:24:02,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:24:02,099 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:24:02,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:24:02,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:24:02,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:24:02,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:24:02,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:24:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:24:02,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:24:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:24:02,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782596879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:24:02,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:24:02,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2023-11-29 06:24:02,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166996671] [2023-11-29 06:24:02,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:24:02,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:24:02,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:24:02,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:24:02,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:24:02,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2023-11-29 06:24:02,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 197 transitions, 1824 flow. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:02,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:24:02,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2023-11-29 06:24:02,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:24:39,916 INFO L124 PetriNetUnfolderBase]: 261665/346669 cut-off events. [2023-11-29 06:24:39,916 INFO L125 PetriNetUnfolderBase]: For 1655524/1660388 co-relation queries the response was YES. [2023-11-29 06:24:41,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1513089 conditions, 346669 events. 261665/346669 cut-off events. For 1655524/1660388 co-relation queries the response was YES. Maximal size of possible extension queue 8654. Compared 2358316 event pairs, 13068 based on Foata normal form. 8091/354183 useless extension candidates. Maximal degree in co-relation 1314394. Up to 56475 conditions per place. [2023-11-29 06:24:43,229 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 1374 selfloop transitions, 43 changer transitions 0/1463 dead transitions. [2023-11-29 06:24:43,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 1463 transitions, 16687 flow [2023-11-29 06:24:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:24:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:24:43,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 344 transitions. [2023-11-29 06:24:43,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-29 06:24:43,231 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 344 transitions. [2023-11-29 06:24:43,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 344 transitions. [2023-11-29 06:24:43,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:24:43,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 344 transitions. [2023-11-29 06:24:43,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 24.571428571428573) internal successors, (344), 14 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:43,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 43.0) internal successors, (645), 15 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:43,235 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 43.0) internal successors, (645), 15 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:24:43,235 INFO L175 Difference]: Start difference. First operand has 138 places, 197 transitions, 1824 flow. Second operand 14 states and 344 transitions. [2023-11-29 06:24:43,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 1463 transitions, 16687 flow [2023-11-29 06:25:58,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 1463 transitions, 16652 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-29 06:25:58,894 INFO L231 Difference]: Finished difference. Result has 156 places, 229 transitions, 2117 flow [2023-11-29 06:25:58,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2117, PETRI_PLACES=156, PETRI_TRANSITIONS=229} [2023-11-29 06:25:58,894 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 109 predicate places. [2023-11-29 06:25:58,894 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 229 transitions, 2117 flow [2023-11-29 06:25:58,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:58,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:25:58,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:25:58,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:25:59,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680393b3-3590-4a35-946a-fb03dca2d255/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:25:59,095 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-29 06:25:59,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:25:59,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1382288386, now seen corresponding path program 4 times [2023-11-29 06:25:59,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:25:59,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408711155] [2023-11-29 06:25:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:25:59,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:25:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:25:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:25:59,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:25:59,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408711155] [2023-11-29 06:25:59,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408711155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:25:59,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:25:59,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:25:59,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313648582] [2023-11-29 06:25:59,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:25:59,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:25:59,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:25:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:25:59,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:25:59,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2023-11-29 06:25:59,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 229 transitions, 2117 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:25:59,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:25:59,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2023-11-29 06:25:59,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand