./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/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_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/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_c8efa27b-78b1-41cd-954b-bf5689991b14/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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:32:59,357 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:32:59,431 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:32:59,436 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:32:59,437 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:32:59,465 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:32:59,466 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:32:59,466 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:32:59,467 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:32:59,468 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:32:59,468 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:32:59,469 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:32:59,470 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:32:59,470 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:32:59,471 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:32:59,471 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:32:59,472 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:32:59,472 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:32:59,473 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:32:59,473 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:32:59,474 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:32:59,475 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:32:59,475 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:32:59,476 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:32:59,476 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:32:59,477 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:32:59,477 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:32:59,478 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:32:59,478 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:32:59,479 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:32:59,479 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:32:59,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:32:59,480 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:32:59,480 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:32:59,480 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:32:59,481 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:32:59,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:32:59,481 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:32:59,481 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:32:59,482 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:32:59,482 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:32:59,482 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:32:59,482 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_c8efa27b-78b1-41cd-954b-bf5689991b14/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2023-11-29 06:32:59,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:32:59,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:32:59,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:32:59,748 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:32:59,749 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:32:59,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-29 06:33:02,545 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:33:02,765 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:33:02,766 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2023-11-29 06:33:02,772 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/data/c029b2f63/d6c1e6ee652e4fcb96b995edec91076a/FLAGbdf785e53 [2023-11-29 06:33:02,784 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/data/c029b2f63/d6c1e6ee652e4fcb96b995edec91076a [2023-11-29 06:33:02,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:33:02,787 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:33:02,788 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:33:02,788 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:33:02,793 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:33:02,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:33:02" (1/1) ... [2023-11-29 06:33:02,794 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3abad142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:02, skipping insertion in model container [2023-11-29 06:33:02,795 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:33:02" (1/1) ... [2023-11-29 06:33:02,817 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:33:02,973 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_c8efa27b-78b1-41cd-954b-bf5689991b14/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2023-11-29 06:33:02,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:33:02,998 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:33:03,014 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_c8efa27b-78b1-41cd-954b-bf5689991b14/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2023-11-29 06:33:03,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:33:03,027 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:33:03,028 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:33:03,034 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:33:03,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03 WrapperNode [2023-11-29 06:33:03,035 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:33:03,036 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:33:03,036 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:33:03,036 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:33:03,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (1/1) ... [2023-11-29 06:33:03,053 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (1/1) ... [2023-11-29 06:33:03,081 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2023-11-29 06:33:03,081 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:33:03,082 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:33:03,082 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:33:03,082 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:33:03,094 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (1/1) ... [2023-11-29 06:33:03,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (1/1) ... [2023-11-29 06:33:03,098 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (1/1) ... [2023-11-29 06:33:03,113 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 3, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 06:33:03,113 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (1/1) ... [2023-11-29 06:33:03,113 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (1/1) ... [2023-11-29 06:33:03,121 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (1/1) ... [2023-11-29 06:33:03,125 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (1/1) ... [2023-11-29 06:33:03,127 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (1/1) ... [2023-11-29 06:33:03,129 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (1/1) ... [2023-11-29 06:33:03,133 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:33:03,134 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:33:03,134 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:33:03,134 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:33:03,135 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (1/1) ... [2023-11-29 06:33:03,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:33:03,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:03,179 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:33:03,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:33:03,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:33:03,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:33:03,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:33:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:33:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:33:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:33:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:33:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:33:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:33:03,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:33:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:33:03,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:33:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:33:03,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:33:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:33:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:33:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:33:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:33:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:33:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:33:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:33:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:33:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:33:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:33:03,231 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 06:33:03,352 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:33:03,355 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:33:03,611 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:33:03,865 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:33:03,865 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:33:03,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:33:03 BoogieIcfgContainer [2023-11-29 06:33:03,866 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:33:03,869 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:33:03,869 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:33:03,872 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:33:03,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:33:02" (1/3) ... [2023-11-29 06:33:03,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704d0638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:33:03, skipping insertion in model container [2023-11-29 06:33:03,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:03" (2/3) ... [2023-11-29 06:33:03,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704d0638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:33:03, skipping insertion in model container [2023-11-29 06:33:03,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:33:03" (3/3) ... [2023-11-29 06:33:03,875 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-11-29 06:33:03,883 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:33:03,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:33:03,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:33:03,893 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:33:03,936 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 06:33:03,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 25 transitions, 64 flow [2023-11-29 06:33:03,993 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-29 06:33:03,993 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:33:03,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 3/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-29 06:33:03,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 25 transitions, 64 flow [2023-11-29 06:33:04,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 56 flow [2023-11-29 06:33:04,012 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:33:04,019 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;@2cd2c581, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:33:04,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 06:33:04,030 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:33:04,030 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-29 06:33:04,031 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:33:04,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:04,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:04,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:04,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash 380329243, now seen corresponding path program 1 times [2023-11-29 06:33:04,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:04,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894188683] [2023-11-29 06:33:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:04,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:04,321 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 06:33:04,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:04,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894188683] [2023-11-29 06:33:04,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894188683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:33:04,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:33:04,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:33:04,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052490589] [2023-11-29 06:33:04,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:33:04,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:33:04,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:04,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:33:04,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:33:04,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-29 06:33:04,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:04,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:04,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-29 06:33:04,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:04,488 INFO L124 PetriNetUnfolderBase]: 100/194 cut-off events. [2023-11-29 06:33:04,489 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-29 06:33:04,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 194 events. 100/194 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 626 event pairs, 24 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 314. Up to 122 conditions per place. [2023-11-29 06:33:04,494 INFO L140 encePairwiseOnDemand]: 21/25 looper letters, 27 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2023-11-29 06:33:04,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 151 flow [2023-11-29 06:33:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:33:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:33:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2023-11-29 06:33:04,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2023-11-29 06:33:04,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 47 transitions. [2023-11-29 06:33:04,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 47 transitions. [2023-11-29 06:33:04,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:04,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 47 transitions. [2023-11-29 06:33:04,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:04,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:04,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:04,516 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 56 flow. Second operand 3 states and 47 transitions. [2023-11-29 06:33:04,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 151 flow [2023-11-29 06:33:04,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:33:04,521 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 67 flow [2023-11-29 06:33:04,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-11-29 06:33:04,527 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2023-11-29 06:33:04,527 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 67 flow [2023-11-29 06:33:04,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:04,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:04,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:04,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:33:04,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:04,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:04,529 INFO L85 PathProgramCache]: Analyzing trace with hash 468797561, now seen corresponding path program 1 times [2023-11-29 06:33:04,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:04,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605405844] [2023-11-29 06:33:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:04,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:04,769 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 06:33:04,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:04,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605405844] [2023-11-29 06:33:04,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605405844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:33:04,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:33:04,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:33:04,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373246720] [2023-11-29 06:33:04,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:33:04,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:33:04,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:33:04,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:33:04,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-29 06:33:04,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 67 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:04,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:04,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-29 06:33:04,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:04,944 INFO L124 PetriNetUnfolderBase]: 184/356 cut-off events. [2023-11-29 06:33:04,944 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-29 06:33:04,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 356 events. 184/356 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1444 event pairs, 121 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 277. Up to 223 conditions per place. [2023-11-29 06:33:04,949 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 42 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-29 06:33:04,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 49 transitions, 228 flow [2023-11-29 06:33:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:33:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:33:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2023-11-29 06:33:04,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2023-11-29 06:33:04,952 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 64 transitions. [2023-11-29 06:33:04,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 64 transitions. [2023-11-29 06:33:04,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:04,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 64 transitions. [2023-11-29 06:33:04,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:04,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 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 06:33:04,955 INFO L81 ComplementDD]: Finished complementDD. Result has 6 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 06:33:04,955 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 67 flow. Second operand 5 states and 64 transitions. [2023-11-29 06:33:04,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 49 transitions, 228 flow [2023-11-29 06:33:04,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 49 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:33:04,959 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 100 flow [2023-11-29 06:33:04,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2023-11-29 06:33:04,960 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-11-29 06:33:04,960 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 100 flow [2023-11-29 06:33:04,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:04,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:04,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:04,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:33:04,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:04,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1187897832, now seen corresponding path program 1 times [2023-11-29 06:33:04,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:04,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937569189] [2023-11-29 06:33:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:04,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:05,124 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 06:33:05,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:05,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937569189] [2023-11-29 06:33:05,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937569189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:33:05,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:33:05,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:33:05,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615748077] [2023-11-29 06:33:05,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:33:05,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:33:05,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:05,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:33:05,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:33:05,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-29 06:33:05,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:05,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:05,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-29 06:33:05,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:05,254 INFO L124 PetriNetUnfolderBase]: 149/292 cut-off events. [2023-11-29 06:33:05,254 INFO L125 PetriNetUnfolderBase]: For 102/111 co-relation queries the response was YES. [2023-11-29 06:33:05,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 292 events. 149/292 cut-off events. For 102/111 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1120 event pairs, 103 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 557. Up to 223 conditions per place. [2023-11-29 06:33:05,258 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 21 selfloop transitions, 2 changer transitions 17/42 dead transitions. [2023-11-29 06:33:05,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 221 flow [2023-11-29 06:33:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:33:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:33:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2023-11-29 06:33:05,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472 [2023-11-29 06:33:05,261 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 59 transitions. [2023-11-29 06:33:05,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 59 transitions. [2023-11-29 06:33:05,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:05,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 59 transitions. [2023-11-29 06:33:05,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:05,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 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 06:33:05,263 INFO L81 ComplementDD]: Finished complementDD. Result has 6 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 06:33:05,264 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 100 flow. Second operand 5 states and 59 transitions. [2023-11-29 06:33:05,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 221 flow [2023-11-29 06:33:05,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 42 transitions, 217 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 06:33:05,267 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 88 flow [2023-11-29 06:33:05,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-11-29 06:33:05,269 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2023-11-29 06:33:05,269 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 88 flow [2023-11-29 06:33:05,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:05,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:05,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:05,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:33:05,270 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:05,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1820180955, now seen corresponding path program 1 times [2023-11-29 06:33:05,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:05,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020076858] [2023-11-29 06:33:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:05,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:05,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:05,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020076858] [2023-11-29 06:33:05,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020076858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:05,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186136732] [2023-11-29 06:33:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:05,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:05,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:05,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:05,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:33:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:05,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:33:05,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:05,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:05,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186136732] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:05,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:33:05,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-29 06:33:05,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986904031] [2023-11-29 06:33:05,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:33:05,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:33:05,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:33:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:33:05,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-29 06:33:05,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:05,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:05,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-29 06:33:05,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:05,781 INFO L124 PetriNetUnfolderBase]: 125/229 cut-off events. [2023-11-29 06:33:05,781 INFO L125 PetriNetUnfolderBase]: For 76/91 co-relation queries the response was YES. [2023-11-29 06:33:05,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 229 events. 125/229 cut-off events. For 76/91 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 767 event pairs, 35 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 593. Up to 121 conditions per place. [2023-11-29 06:33:05,784 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 27 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2023-11-29 06:33:05,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 181 flow [2023-11-29 06:33:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:33:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:33:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2023-11-29 06:33:05,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-29 06:33:05,786 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 50 transitions. [2023-11-29 06:33:05,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 50 transitions. [2023-11-29 06:33:05,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:05,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 50 transitions. [2023-11-29 06:33:05,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:05,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 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 06:33:05,789 INFO L81 ComplementDD]: Finished complementDD. Result has 6 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 06:33:05,789 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 88 flow. Second operand 5 states and 50 transitions. [2023-11-29 06:33:05,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 181 flow [2023-11-29 06:33:05,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 34 transitions, 157 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-11-29 06:33:05,792 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 93 flow [2023-11-29 06:33:05,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-11-29 06:33:05,794 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2023-11-29 06:33:05,794 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 93 flow [2023-11-29 06:33:05,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:05,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:05,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:05,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:33:05,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-29 06:33:06,000 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:06,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1013209238, now seen corresponding path program 1 times [2023-11-29 06:33:06,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:06,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100925252] [2023-11-29 06:33:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:06,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:06,131 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 06:33:06,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:06,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100925252] [2023-11-29 06:33:06,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100925252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:06,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452546535] [2023-11-29 06:33:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:06,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:06,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:06,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:06,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:33:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:06,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:33:06,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:06,278 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 06:33:06,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:06,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452546535] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:06,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:33:06,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-11-29 06:33:06,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312317291] [2023-11-29 06:33:06,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:33:06,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:33:06,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:06,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:33:06,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:33:06,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-29 06:33:06,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:06,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:06,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-29 06:33:06,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:06,422 INFO L124 PetriNetUnfolderBase]: 122/225 cut-off events. [2023-11-29 06:33:06,422 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-29 06:33:06,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 225 events. 122/225 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 726 event pairs, 32 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 578. Up to 113 conditions per place. [2023-11-29 06:33:06,425 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-11-29 06:33:06,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 190 flow [2023-11-29 06:33:06,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:33:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:33:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2023-11-29 06:33:06,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-29 06:33:06,427 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 50 transitions. [2023-11-29 06:33:06,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 50 transitions. [2023-11-29 06:33:06,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:06,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 50 transitions. [2023-11-29 06:33:06,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:06,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 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 06:33:06,429 INFO L81 ComplementDD]: Finished complementDD. Result has 6 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 06:33:06,429 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 93 flow. Second operand 5 states and 50 transitions. [2023-11-29 06:33:06,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 190 flow [2023-11-29 06:33:06,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:33:06,432 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 110 flow [2023-11-29 06:33:06,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-11-29 06:33:06,433 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2023-11-29 06:33:06,433 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 110 flow [2023-11-29 06:33:06,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:06,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:06,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:06,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:33:06,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:06,640 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:06,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:06,640 INFO L85 PathProgramCache]: Analyzing trace with hash 427248614, now seen corresponding path program 1 times [2023-11-29 06:33:06,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:06,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728041451] [2023-11-29 06:33:06,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:06,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:07,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:07,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728041451] [2023-11-29 06:33:07,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728041451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:07,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282344607] [2023-11-29 06:33:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:07,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:07,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:07,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:07,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:33:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:07,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 06:33:07,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:07,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:33:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:07,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:07,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282344607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:07,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:07,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 14 [2023-11-29 06:33:07,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063814426] [2023-11-29 06:33:07,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:07,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:33:07,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:33:07,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:33:07,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-29 06:33:07,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 110 flow. Second operand has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 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 06:33:07,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:07,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-29 06:33:07,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:07,895 INFO L124 PetriNetUnfolderBase]: 142/281 cut-off events. [2023-11-29 06:33:07,895 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-11-29 06:33:07,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 281 events. 142/281 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 994 event pairs, 33 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 789. Up to 160 conditions per place. [2023-11-29 06:33:07,898 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 36 selfloop transitions, 20 changer transitions 1/62 dead transitions. [2023-11-29 06:33:07,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 354 flow [2023-11-29 06:33:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:33:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:33:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2023-11-29 06:33:07,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488888888888889 [2023-11-29 06:33:07,901 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 101 transitions. [2023-11-29 06:33:07,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 101 transitions. [2023-11-29 06:33:07,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:07,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 101 transitions. [2023-11-29 06:33:07,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 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 06:33:07,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:07,904 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:07,905 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 110 flow. Second operand 9 states and 101 transitions. [2023-11-29 06:33:07,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 354 flow [2023-11-29 06:33:07,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 343 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:33:07,908 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 250 flow [2023-11-29 06:33:07,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-29 06:33:07,910 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2023-11-29 06:33:07,910 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 250 flow [2023-11-29 06:33:07,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.333333333333333) internal successors, (110), 15 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 06:33:07,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:07,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:07,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:33:08,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:33:08,116 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:08,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash 539754996, now seen corresponding path program 2 times [2023-11-29 06:33:08,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:08,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228131824] [2023-11-29 06:33:08,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:08,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:08,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:08,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228131824] [2023-11-29 06:33:08,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228131824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:08,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482104472] [2023-11-29 06:33:08,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:33:08,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:08,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:08,659 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:08,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:33:08,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:33:08,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:08,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:33:08,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:08,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:08,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:08,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-11-29 06:33:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:08,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482104472] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:08,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:08,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2023-11-29 06:33:08,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873654151] [2023-11-29 06:33:08,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:08,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:33:08,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:08,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:33:08,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:33:09,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-29 06:33:09,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 250 flow. Second operand has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:09,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:09,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-29 06:33:09,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:09,383 INFO L124 PetriNetUnfolderBase]: 205/419 cut-off events. [2023-11-29 06:33:09,384 INFO L125 PetriNetUnfolderBase]: For 694/698 co-relation queries the response was YES. [2023-11-29 06:33:09,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 419 events. 205/419 cut-off events. For 694/698 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1796 event pairs, 30 based on Foata normal form. 5/420 useless extension candidates. Maximal degree in co-relation 1427. Up to 182 conditions per place. [2023-11-29 06:33:09,389 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 47 selfloop transitions, 40 changer transitions 1/93 dead transitions. [2023-11-29 06:33:09,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 651 flow [2023-11-29 06:33:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:33:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:33:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2023-11-29 06:33:09,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2023-11-29 06:33:09,392 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 136 transitions. [2023-11-29 06:33:09,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 136 transitions. [2023-11-29 06:33:09,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:09,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 136 transitions. [2023-11-29 06:33:09,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:09,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:09,395 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:09,395 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 250 flow. Second operand 12 states and 136 transitions. [2023-11-29 06:33:09,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 651 flow [2023-11-29 06:33:09,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 93 transitions, 623 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-11-29 06:33:09,402 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 468 flow [2023-11-29 06:33:09,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=468, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-11-29 06:33:09,403 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2023-11-29 06:33:09,403 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 468 flow [2023-11-29 06:33:09,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.714285714285714) internal successors, (108), 14 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:09,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:09,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:09,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 06:33:09,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:09,610 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:09,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:09,610 INFO L85 PathProgramCache]: Analyzing trace with hash -911825096, now seen corresponding path program 3 times [2023-11-29 06:33:09,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:09,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698030849] [2023-11-29 06:33:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:09,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:10,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:10,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698030849] [2023-11-29 06:33:10,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698030849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:10,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418279750] [2023-11-29 06:33:10,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:33:10,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:10,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:10,080 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:10,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:33:10,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:33:10,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:10,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:33:10,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:10,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:10,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:10,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2023-11-29 06:33:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:10,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418279750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:10,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:10,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 12 [2023-11-29 06:33:10,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940663142] [2023-11-29 06:33:10,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:10,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:33:10,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:10,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:33:10,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:33:10,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-29 06:33:10,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 468 flow. Second operand has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:10,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:10,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-29 06:33:10,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:10,647 INFO L124 PetriNetUnfolderBase]: 247/500 cut-off events. [2023-11-29 06:33:10,647 INFO L125 PetriNetUnfolderBase]: For 1073/1081 co-relation queries the response was YES. [2023-11-29 06:33:10,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1900 conditions, 500 events. 247/500 cut-off events. For 1073/1081 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2288 event pairs, 53 based on Foata normal form. 9/506 useless extension candidates. Maximal degree in co-relation 1866. Up to 353 conditions per place. [2023-11-29 06:33:10,652 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 61 selfloop transitions, 22 changer transitions 1/89 dead transitions. [2023-11-29 06:33:10,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 765 flow [2023-11-29 06:33:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:33:10,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:33:10,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2023-11-29 06:33:10,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-11-29 06:33:10,654 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 99 transitions. [2023-11-29 06:33:10,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 99 transitions. [2023-11-29 06:33:10,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:10,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 99 transitions. [2023-11-29 06:33:10,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:10,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:10,656 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:10,656 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 468 flow. Second operand 9 states and 99 transitions. [2023-11-29 06:33:10,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 89 transitions, 765 flow [2023-11-29 06:33:10,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 89 transitions, 705 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-11-29 06:33:10,663 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 559 flow [2023-11-29 06:33:10,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=559, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2023-11-29 06:33:10,664 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2023-11-29 06:33:10,664 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 559 flow [2023-11-29 06:33:10,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.846153846153846) internal successors, (102), 13 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:10,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:10,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:10,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:33:10,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:10,872 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:10,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:10,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1717928260, now seen corresponding path program 4 times [2023-11-29 06:33:10,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:10,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065669697] [2023-11-29 06:33:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:10,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:11,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:11,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:11,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065669697] [2023-11-29 06:33:11,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065669697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:11,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61727610] [2023-11-29 06:33:11,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:33:11,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:11,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:11,312 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:11,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:33:11,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:33:11,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:11,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 06:33:11,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:11,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:33:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:11,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:11,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61727610] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:11,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:11,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 5] total 13 [2023-11-29 06:33:11,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592112118] [2023-11-29 06:33:11,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:11,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:33:11,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:33:11,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:33:11,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-29 06:33:11,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 559 flow. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:11,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:11,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-29 06:33:11,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:11,983 INFO L124 PetriNetUnfolderBase]: 287/580 cut-off events. [2023-11-29 06:33:11,983 INFO L125 PetriNetUnfolderBase]: For 1219/1223 co-relation queries the response was YES. [2023-11-29 06:33:11,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2198 conditions, 580 events. 287/580 cut-off events. For 1219/1223 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2790 event pairs, 58 based on Foata normal form. 5/581 useless extension candidates. Maximal degree in co-relation 2159. Up to 361 conditions per place. [2023-11-29 06:33:11,990 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 63 selfloop transitions, 36 changer transitions 1/105 dead transitions. [2023-11-29 06:33:11,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 914 flow [2023-11-29 06:33:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:33:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:33:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2023-11-29 06:33:11,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444 [2023-11-29 06:33:11,993 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 111 transitions. [2023-11-29 06:33:11,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 111 transitions. [2023-11-29 06:33:11,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:11,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 111 transitions. [2023-11-29 06:33:11,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:11,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:11,995 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:11,996 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 559 flow. Second operand 10 states and 111 transitions. [2023-11-29 06:33:11,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 914 flow [2023-11-29 06:33:12,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 902 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 06:33:12,004 INFO L231 Difference]: Finished difference. Result has 72 places, 85 transitions, 739 flow [2023-11-29 06:33:12,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=739, PETRI_PLACES=72, PETRI_TRANSITIONS=85} [2023-11-29 06:33:12,007 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2023-11-29 06:33:12,007 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 85 transitions, 739 flow [2023-11-29 06:33:12,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:12,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:12,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:12,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:33:12,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:12,214 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:12,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1921342962, now seen corresponding path program 5 times [2023-11-29 06:33:12,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:12,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848738161] [2023-11-29 06:33:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:12,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:12,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:12,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848738161] [2023-11-29 06:33:12,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848738161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:12,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180931508] [2023-11-29 06:33:12,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:33:12,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:12,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:12,538 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:12,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:33:12,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:33:12,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:12,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 06:33:12,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:12,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:33:12,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:12,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-11-29 06:33:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:12,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:13,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180931508] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:13,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:13,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 22 [2023-11-29 06:33:13,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387751913] [2023-11-29 06:33:13,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:13,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:33:13,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:13,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:33:13,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:33:13,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:33:13,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 739 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:13,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:13,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:33:13,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:15,432 INFO L124 PetriNetUnfolderBase]: 960/1659 cut-off events. [2023-11-29 06:33:15,432 INFO L125 PetriNetUnfolderBase]: For 3838/3838 co-relation queries the response was YES. [2023-11-29 06:33:15,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6586 conditions, 1659 events. 960/1659 cut-off events. For 3838/3838 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8339 event pairs, 79 based on Foata normal form. 2/1661 useless extension candidates. Maximal degree in co-relation 6544. Up to 597 conditions per place. [2023-11-29 06:33:15,450 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 158 selfloop transitions, 152 changer transitions 5/316 dead transitions. [2023-11-29 06:33:15,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 316 transitions, 2746 flow [2023-11-29 06:33:15,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 06:33:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-29 06:33:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 344 transitions. [2023-11-29 06:33:15,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3528205128205128 [2023-11-29 06:33:15,454 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 344 transitions. [2023-11-29 06:33:15,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 344 transitions. [2023-11-29 06:33:15,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:15,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 344 transitions. [2023-11-29 06:33:15,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 8.820512820512821) internal successors, (344), 39 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 06:33:15,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 25.0) internal successors, (1000), 40 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:15,459 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 25.0) internal successors, (1000), 40 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:15,459 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 739 flow. Second operand 39 states and 344 transitions. [2023-11-29 06:33:15,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 316 transitions, 2746 flow [2023-11-29 06:33:15,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 316 transitions, 2576 flow, removed 83 selfloop flow, removed 2 redundant places. [2023-11-29 06:33:15,480 INFO L231 Difference]: Finished difference. Result has 123 places, 200 transitions, 2088 flow [2023-11-29 06:33:15,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2088, PETRI_PLACES=123, PETRI_TRANSITIONS=200} [2023-11-29 06:33:15,481 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 97 predicate places. [2023-11-29 06:33:15,481 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 200 transitions, 2088 flow [2023-11-29 06:33:15,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:15,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:15,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:15,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:33:15,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:33:15,685 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:15,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash 477707350, now seen corresponding path program 6 times [2023-11-29 06:33:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:15,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085205265] [2023-11-29 06:33:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:15,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:15,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:15,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085205265] [2023-11-29 06:33:15,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085205265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:15,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535838371] [2023-11-29 06:33:15,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:33:15,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:15,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:15,877 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:15,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:33:16,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:33:16,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:16,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:33:16,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:16,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:16,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535838371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:16,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:16,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 06:33:16,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046670602] [2023-11-29 06:33:16,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:16,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:33:16,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:16,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:33:16,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:33:16,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-29 06:33:16,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 200 transitions, 2088 flow. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:16,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:16,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-29 06:33:16,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:16,769 INFO L124 PetriNetUnfolderBase]: 1279/2495 cut-off events. [2023-11-29 06:33:16,769 INFO L125 PetriNetUnfolderBase]: For 13486/13661 co-relation queries the response was YES. [2023-11-29 06:33:16,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13110 conditions, 2495 events. 1279/2495 cut-off events. For 13486/13661 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15824 event pairs, 441 based on Foata normal form. 79/2566 useless extension candidates. Maximal degree in co-relation 12734. Up to 1298 conditions per place. [2023-11-29 06:33:16,799 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 317 selfloop transitions, 42 changer transitions 7/376 dead transitions. [2023-11-29 06:33:16,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 376 transitions, 4623 flow [2023-11-29 06:33:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:33:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:33:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2023-11-29 06:33:16,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742857142857143 [2023-11-29 06:33:16,800 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 83 transitions. [2023-11-29 06:33:16,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 83 transitions. [2023-11-29 06:33:16,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:16,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 83 transitions. [2023-11-29 06:33:16,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:16,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:16,802 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:16,802 INFO L175 Difference]: Start difference. First operand has 123 places, 200 transitions, 2088 flow. Second operand 7 states and 83 transitions. [2023-11-29 06:33:16,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 376 transitions, 4623 flow [2023-11-29 06:33:16,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 376 transitions, 4180 flow, removed 219 selfloop flow, removed 2 redundant places. [2023-11-29 06:33:16,881 INFO L231 Difference]: Finished difference. Result has 131 places, 240 transitions, 2531 flow [2023-11-29 06:33:16,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1850, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2531, PETRI_PLACES=131, PETRI_TRANSITIONS=240} [2023-11-29 06:33:16,882 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 105 predicate places. [2023-11-29 06:33:16,883 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 240 transitions, 2531 flow [2023-11-29 06:33:16,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:16,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:16,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:16,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 06:33:17,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:33:17,092 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:17,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1593036817, now seen corresponding path program 7 times [2023-11-29 06:33:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:17,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051970629] [2023-11-29 06:33:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:17,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:17,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:17,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051970629] [2023-11-29 06:33:17,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051970629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:17,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397976131] [2023-11-29 06:33:17,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:33:17,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:17,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:17,205 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:17,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:33:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:17,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:33:17,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:17,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:17,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397976131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:17,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:17,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 06:33:17,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979577502] [2023-11-29 06:33:17,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:17,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:33:17,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:17,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:33:17,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:33:17,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-29 06:33:17,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 240 transitions, 2531 flow. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:17,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:17,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-29 06:33:17,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:17,989 INFO L124 PetriNetUnfolderBase]: 1022/1944 cut-off events. [2023-11-29 06:33:17,989 INFO L125 PetriNetUnfolderBase]: For 11330/11408 co-relation queries the response was YES. [2023-11-29 06:33:18,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10056 conditions, 1944 events. 1022/1944 cut-off events. For 11330/11408 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11338 event pairs, 402 based on Foata normal form. 118/2054 useless extension candidates. Maximal degree in co-relation 9805. Up to 1374 conditions per place. [2023-11-29 06:33:18,013 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 188 selfloop transitions, 3 changer transitions 92/293 dead transitions. [2023-11-29 06:33:18,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 293 transitions, 3545 flow [2023-11-29 06:33:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:33:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:33:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2023-11-29 06:33:18,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2023-11-29 06:33:18,016 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 82 transitions. [2023-11-29 06:33:18,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 82 transitions. [2023-11-29 06:33:18,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:18,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 82 transitions. [2023-11-29 06:33:18,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:18,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:18,018 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 25.0) internal successors, (200), 8 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:18,018 INFO L175 Difference]: Start difference. First operand has 131 places, 240 transitions, 2531 flow. Second operand 7 states and 82 transitions. [2023-11-29 06:33:18,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 293 transitions, 3545 flow [2023-11-29 06:33:18,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 293 transitions, 3501 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-11-29 06:33:18,145 INFO L231 Difference]: Finished difference. Result has 138 places, 201 transitions, 1990 flow [2023-11-29 06:33:18,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1990, PETRI_PLACES=138, PETRI_TRANSITIONS=201} [2023-11-29 06:33:18,146 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 112 predicate places. [2023-11-29 06:33:18,146 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 201 transitions, 1990 flow [2023-11-29 06:33:18,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:18,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:18,147 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:18,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:33:18,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:33:18,348 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:18,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:18,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1518914974, now seen corresponding path program 8 times [2023-11-29 06:33:18,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:18,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875014042] [2023-11-29 06:33:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:18,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:33:18,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:18,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875014042] [2023-11-29 06:33:18,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875014042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:18,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512600477] [2023-11-29 06:33:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:33:18,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:18,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:18,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:18,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:33:18,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:33:18,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:18,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:33:18,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:33:18,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:33:18,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512600477] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:18,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:18,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-29 06:33:18,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457302925] [2023-11-29 06:33:18,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:18,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:33:18,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:18,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:33:18,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:33:18,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-29 06:33:18,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 201 transitions, 1990 flow. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:18,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:18,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-29 06:33:18,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:19,116 INFO L124 PetriNetUnfolderBase]: 775/1415 cut-off events. [2023-11-29 06:33:19,116 INFO L125 PetriNetUnfolderBase]: For 9015/9101 co-relation queries the response was YES. [2023-11-29 06:33:19,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7375 conditions, 1415 events. 775/1415 cut-off events. For 9015/9101 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7311 event pairs, 93 based on Foata normal form. 130/1538 useless extension candidates. Maximal degree in co-relation 7315. Up to 574 conditions per place. [2023-11-29 06:33:19,154 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 192 selfloop transitions, 43 changer transitions 0/245 dead transitions. [2023-11-29 06:33:19,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 245 transitions, 2777 flow [2023-11-29 06:33:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:33:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:33:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2023-11-29 06:33:19,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38222222222222224 [2023-11-29 06:33:19,156 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 86 transitions. [2023-11-29 06:33:19,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 86 transitions. [2023-11-29 06:33:19,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:19,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 86 transitions. [2023-11-29 06:33:19,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:19,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:19,158 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:19,158 INFO L175 Difference]: Start difference. First operand has 138 places, 201 transitions, 1990 flow. Second operand 9 states and 86 transitions. [2023-11-29 06:33:19,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 245 transitions, 2777 flow [2023-11-29 06:33:19,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 245 transitions, 2563 flow, removed 78 selfloop flow, removed 12 redundant places. [2023-11-29 06:33:19,213 INFO L231 Difference]: Finished difference. Result has 129 places, 202 transitions, 1969 flow [2023-11-29 06:33:19,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1969, PETRI_PLACES=129, PETRI_TRANSITIONS=202} [2023-11-29 06:33:19,214 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 103 predicate places. [2023-11-29 06:33:19,215 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 202 transitions, 1969 flow [2023-11-29 06:33:19,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:19,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:19,215 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:19,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:33:19,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:33:19,416 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:19,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:19,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1877184865, now seen corresponding path program 9 times [2023-11-29 06:33:19,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:19,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650911196] [2023-11-29 06:33:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:19,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:33:19,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:19,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650911196] [2023-11-29 06:33:19,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650911196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:19,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406376943] [2023-11-29 06:33:19,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:33:19,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:19,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:19,543 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:19,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:33:19,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:33:19,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:19,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:33:19,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:33:19,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:33:19,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406376943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:19,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:19,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-29 06:33:19,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962019872] [2023-11-29 06:33:19,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:19,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:33:19,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:19,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:33:19,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:33:19,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-29 06:33:19,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 202 transitions, 1969 flow. Second operand has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 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 06:33:19,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:19,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-29 06:33:19,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:20,114 INFO L124 PetriNetUnfolderBase]: 634/1165 cut-off events. [2023-11-29 06:33:20,114 INFO L125 PetriNetUnfolderBase]: For 6085/6211 co-relation queries the response was YES. [2023-11-29 06:33:20,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6169 conditions, 1165 events. 634/1165 cut-off events. For 6085/6211 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5821 event pairs, 53 based on Foata normal form. 68/1231 useless extension candidates. Maximal degree in co-relation 6128. Up to 442 conditions per place. [2023-11-29 06:33:20,128 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 168 selfloop transitions, 38 changer transitions 0/216 dead transitions. [2023-11-29 06:33:20,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 216 transitions, 2493 flow [2023-11-29 06:33:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:33:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:33:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2023-11-29 06:33:20,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38222222222222224 [2023-11-29 06:33:20,130 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 86 transitions. [2023-11-29 06:33:20,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 86 transitions. [2023-11-29 06:33:20,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:20,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 86 transitions. [2023-11-29 06:33:20,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:20,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:20,131 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:20,131 INFO L175 Difference]: Start difference. First operand has 129 places, 202 transitions, 1969 flow. Second operand 9 states and 86 transitions. [2023-11-29 06:33:20,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 216 transitions, 2493 flow [2023-11-29 06:33:20,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 216 transitions, 2450 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-11-29 06:33:20,160 INFO L231 Difference]: Finished difference. Result has 128 places, 181 transitions, 1860 flow [2023-11-29 06:33:20,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1860, PETRI_PLACES=128, PETRI_TRANSITIONS=181} [2023-11-29 06:33:20,161 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 102 predicate places. [2023-11-29 06:33:20,161 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 181 transitions, 1860 flow [2023-11-29 06:33:20,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 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 06:33:20,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:20,161 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:20,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:33:20,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:20,362 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:20,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:20,363 INFO L85 PathProgramCache]: Analyzing trace with hash 722523545, now seen corresponding path program 10 times [2023-11-29 06:33:20,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:20,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157767846] [2023-11-29 06:33:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:20,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:21,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:21,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157767846] [2023-11-29 06:33:21,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157767846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:21,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110417006] [2023-11-29 06:33:21,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:33:21,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:21,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:21,247 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:21,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:33:21,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:33:21,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:21,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:33:21,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:21,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:21,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:21,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-29 06:33:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:21,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110417006] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:21,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:21,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 31 [2023-11-29 06:33:21,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286384395] [2023-11-29 06:33:21,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:21,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:33:21,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:21,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:33:21,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:33:22,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-29 06:33:22,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 181 transitions, 1860 flow. Second operand has 32 states, 32 states have (on average 5.9375) internal successors, (190), 32 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:22,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:22,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-29 06:33:22,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:24,049 INFO L124 PetriNetUnfolderBase]: 883/1649 cut-off events. [2023-11-29 06:33:24,049 INFO L125 PetriNetUnfolderBase]: For 8242/8346 co-relation queries the response was YES. [2023-11-29 06:33:24,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8809 conditions, 1649 events. 883/1649 cut-off events. For 8242/8346 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9056 event pairs, 25 based on Foata normal form. 7/1654 useless extension candidates. Maximal degree in co-relation 8742. Up to 733 conditions per place. [2023-11-29 06:33:24,065 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 167 selfloop transitions, 154 changer transitions 1/332 dead transitions. [2023-11-29 06:33:24,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 332 transitions, 3609 flow [2023-11-29 06:33:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:33:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 06:33:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 272 transitions. [2023-11-29 06:33:24,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38857142857142857 [2023-11-29 06:33:24,067 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 272 transitions. [2023-11-29 06:33:24,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 272 transitions. [2023-11-29 06:33:24,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:24,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 272 transitions. [2023-11-29 06:33:24,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 9.714285714285714) internal successors, (272), 28 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:24,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 25.0) internal successors, (725), 29 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:24,071 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 25.0) internal successors, (725), 29 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:24,071 INFO L175 Difference]: Start difference. First operand has 128 places, 181 transitions, 1860 flow. Second operand 28 states and 272 transitions. [2023-11-29 06:33:24,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 332 transitions, 3609 flow [2023-11-29 06:33:24,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 332 transitions, 3602 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:33:24,103 INFO L231 Difference]: Finished difference. Result has 160 places, 251 transitions, 3090 flow [2023-11-29 06:33:24,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3090, PETRI_PLACES=160, PETRI_TRANSITIONS=251} [2023-11-29 06:33:24,104 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 134 predicate places. [2023-11-29 06:33:24,104 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 251 transitions, 3090 flow [2023-11-29 06:33:24,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.9375) internal successors, (190), 32 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:24,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:24,104 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:24,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:33:24,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:33:24,305 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:24,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:24,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1882714087, now seen corresponding path program 11 times [2023-11-29 06:33:24,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:24,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110524567] [2023-11-29 06:33:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:24,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:24,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:24,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110524567] [2023-11-29 06:33:24,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110524567] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:24,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519795881] [2023-11-29 06:33:24,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:33:24,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:24,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:24,955 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:24,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:33:25,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:33:25,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:25,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 06:33:25,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:25,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:25,480 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:25,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-29 06:33:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:25,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519795881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:25,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:25,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 30 [2023-11-29 06:33:25,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887728403] [2023-11-29 06:33:25,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:25,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 06:33:25,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:25,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 06:33:25,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:33:25,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2023-11-29 06:33:25,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 251 transitions, 3090 flow. Second operand has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:25,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:25,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2023-11-29 06:33:25,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:26,881 INFO L124 PetriNetUnfolderBase]: 990/1862 cut-off events. [2023-11-29 06:33:26,881 INFO L125 PetriNetUnfolderBase]: For 13263/13371 co-relation queries the response was YES. [2023-11-29 06:33:26,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11356 conditions, 1862 events. 990/1862 cut-off events. For 13263/13371 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10618 event pairs, 85 based on Foata normal form. 1/1857 useless extension candidates. Maximal degree in co-relation 11279. Up to 1378 conditions per place. [2023-11-29 06:33:26,895 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 250 selfloop transitions, 68 changer transitions 1/329 dead transitions. [2023-11-29 06:33:26,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 329 transitions, 4364 flow [2023-11-29 06:33:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:33:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 06:33:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 201 transitions. [2023-11-29 06:33:26,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38285714285714284 [2023-11-29 06:33:26,897 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 201 transitions. [2023-11-29 06:33:26,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 201 transitions. [2023-11-29 06:33:26,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:26,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 201 transitions. [2023-11-29 06:33:26,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 9.571428571428571) internal successors, (201), 21 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:26,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 25.0) internal successors, (550), 22 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:26,899 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 25.0) internal successors, (550), 22 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:26,899 INFO L175 Difference]: Start difference. First operand has 160 places, 251 transitions, 3090 flow. Second operand 21 states and 201 transitions. [2023-11-29 06:33:26,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 329 transitions, 4364 flow [2023-11-29 06:33:26,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 329 transitions, 4174 flow, removed 59 selfloop flow, removed 12 redundant places. [2023-11-29 06:33:26,944 INFO L231 Difference]: Finished difference. Result has 175 places, 274 transitions, 3383 flow [2023-11-29 06:33:26,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3383, PETRI_PLACES=175, PETRI_TRANSITIONS=274} [2023-11-29 06:33:26,945 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 149 predicate places. [2023-11-29 06:33:26,945 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 274 transitions, 3383 flow [2023-11-29 06:33:26,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.129032258064516) internal successors, (190), 31 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:26,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:26,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:26,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:33:27,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:33:27,146 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:27,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1674796613, now seen corresponding path program 12 times [2023-11-29 06:33:27,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:27,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527997966] [2023-11-29 06:33:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:27,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:27,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:27,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527997966] [2023-11-29 06:33:27,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527997966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:27,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62449252] [2023-11-29 06:33:27,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:33:27,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:27,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:27,791 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:27,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:33:27,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 06:33:27,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:27,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:33:27,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:28,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:28,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:28,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-29 06:33:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:28,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62449252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:28,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:28,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 21 [2023-11-29 06:33:28,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310130877] [2023-11-29 06:33:28,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:28,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:33:28,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:28,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:33:28,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:33:28,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-29 06:33:28,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 274 transitions, 3383 flow. Second operand has 22 states, 22 states have (on average 7.136363636363637) internal successors, (157), 22 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:28,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:28,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-29 06:33:28,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:29,226 INFO L124 PetriNetUnfolderBase]: 1017/1975 cut-off events. [2023-11-29 06:33:29,226 INFO L125 PetriNetUnfolderBase]: For 15412/15620 co-relation queries the response was YES. [2023-11-29 06:33:29,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12368 conditions, 1975 events. 1017/1975 cut-off events. For 15412/15620 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11607 event pairs, 103 based on Foata normal form. 16/1978 useless extension candidates. Maximal degree in co-relation 12286. Up to 1353 conditions per place. [2023-11-29 06:33:29,249 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 241 selfloop transitions, 87 changer transitions 2/361 dead transitions. [2023-11-29 06:33:29,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 361 transitions, 4797 flow [2023-11-29 06:33:29,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:33:29,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 06:33:29,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 226 transitions. [2023-11-29 06:33:29,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109090909090909 [2023-11-29 06:33:29,251 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 226 transitions. [2023-11-29 06:33:29,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 226 transitions. [2023-11-29 06:33:29,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:29,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 226 transitions. [2023-11-29 06:33:29,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 10.272727272727273) internal successors, (226), 22 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:29,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 25.0) internal successors, (575), 23 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:29,254 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 25.0) internal successors, (575), 23 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:29,254 INFO L175 Difference]: Start difference. First operand has 175 places, 274 transitions, 3383 flow. Second operand 22 states and 226 transitions. [2023-11-29 06:33:29,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 361 transitions, 4797 flow [2023-11-29 06:33:29,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 361 transitions, 4712 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-11-29 06:33:29,335 INFO L231 Difference]: Finished difference. Result has 194 places, 315 transitions, 4125 flow [2023-11-29 06:33:29,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4125, PETRI_PLACES=194, PETRI_TRANSITIONS=315} [2023-11-29 06:33:29,336 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 168 predicate places. [2023-11-29 06:33:29,336 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 315 transitions, 4125 flow [2023-11-29 06:33:29,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.136363636363637) internal successors, (157), 22 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:29,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:29,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:29,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 06:33:29,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:33:29,537 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:29,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:29,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1454816735, now seen corresponding path program 13 times [2023-11-29 06:33:29,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:29,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556022674] [2023-11-29 06:33:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:29,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:29,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:29,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556022674] [2023-11-29 06:33:29,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556022674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:29,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122065747] [2023-11-29 06:33:29,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:33:29,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:29,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:29,942 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:29,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:33:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:30,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:33:30,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:30,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:30,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:30,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-29 06:33:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:30,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122065747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:30,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:30,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 21 [2023-11-29 06:33:30,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503215596] [2023-11-29 06:33:30,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:30,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:33:30,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:30,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:33:30,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:33:30,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-29 06:33:30,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 315 transitions, 4125 flow. Second operand has 22 states, 22 states have (on average 7.045454545454546) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:30,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:30,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-29 06:33:30,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:31,253 INFO L124 PetriNetUnfolderBase]: 1073/2091 cut-off events. [2023-11-29 06:33:31,253 INFO L125 PetriNetUnfolderBase]: For 21001/21217 co-relation queries the response was YES. [2023-11-29 06:33:31,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14279 conditions, 2091 events. 1073/2091 cut-off events. For 21001/21217 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12522 event pairs, 128 based on Foata normal form. 17/2091 useless extension candidates. Maximal degree in co-relation 14187. Up to 1512 conditions per place. [2023-11-29 06:33:31,274 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 261 selfloop transitions, 66 changer transitions 1/359 dead transitions. [2023-11-29 06:33:31,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 359 transitions, 5163 flow [2023-11-29 06:33:31,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 06:33:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 06:33:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 160 transitions. [2023-11-29 06:33:31,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-29 06:33:31,276 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 160 transitions. [2023-11-29 06:33:31,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 160 transitions. [2023-11-29 06:33:31,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:31,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 160 transitions. [2023-11-29 06:33:31,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 10.0) internal successors, (160), 16 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:31,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 25.0) internal successors, (425), 17 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:31,278 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 25.0) internal successors, (425), 17 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:31,278 INFO L175 Difference]: Start difference. First operand has 194 places, 315 transitions, 4125 flow. Second operand 16 states and 160 transitions. [2023-11-29 06:33:31,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 359 transitions, 5163 flow [2023-11-29 06:33:31,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 359 transitions, 5004 flow, removed 59 selfloop flow, removed 8 redundant places. [2023-11-29 06:33:31,396 INFO L231 Difference]: Finished difference. Result has 204 places, 328 transitions, 4359 flow [2023-11-29 06:33:31,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4359, PETRI_PLACES=204, PETRI_TRANSITIONS=328} [2023-11-29 06:33:31,397 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 178 predicate places. [2023-11-29 06:33:31,397 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 328 transitions, 4359 flow [2023-11-29 06:33:31,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.045454545454546) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:31,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:31,397 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:31,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:33:31,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:33:31,598 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:31,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:31,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1833857101, now seen corresponding path program 14 times [2023-11-29 06:33:31,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:31,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125486202] [2023-11-29 06:33:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:31,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:32,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:32,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125486202] [2023-11-29 06:33:32,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125486202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:32,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017927626] [2023-11-29 06:33:32,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:33:32,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:32,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:32,402 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:32,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:33:32,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:33:32,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:32,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 06:33:32,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:32,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:32,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-11-29 06:33:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:32,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:33,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:33,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 53 [2023-11-29 06:33:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:33,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017927626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:33,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:33,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2023-11-29 06:33:33,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440494792] [2023-11-29 06:33:33,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:33,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 06:33:33,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:33,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 06:33:33,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 06:33:33,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:33:33,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 328 transitions, 4359 flow. Second operand has 41 states, 41 states have (on average 4.902439024390244) internal successors, (201), 41 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:33,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:33,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:33:33,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:35,964 INFO L124 PetriNetUnfolderBase]: 2068/3503 cut-off events. [2023-11-29 06:33:35,964 INFO L125 PetriNetUnfolderBase]: For 39496/39496 co-relation queries the response was YES. [2023-11-29 06:33:35,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24300 conditions, 3503 events. 2068/3503 cut-off events. For 39496/39496 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 19512 event pairs, 135 based on Foata normal form. 1/3504 useless extension candidates. Maximal degree in co-relation 24205. Up to 2031 conditions per place. [2023-11-29 06:33:35,991 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 317 selfloop transitions, 245 changer transitions 4/567 dead transitions. [2023-11-29 06:33:35,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 567 transitions, 8222 flow [2023-11-29 06:33:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 06:33:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 06:33:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 305 transitions. [2023-11-29 06:33:35,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3696969696969697 [2023-11-29 06:33:35,993 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 305 transitions. [2023-11-29 06:33:35,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 305 transitions. [2023-11-29 06:33:35,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:35,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 305 transitions. [2023-11-29 06:33:35,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 9.242424242424242) internal successors, (305), 33 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:35,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 25.0) internal successors, (850), 34 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:35,996 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 25.0) internal successors, (850), 34 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:35,996 INFO L175 Difference]: Start difference. First operand has 204 places, 328 transitions, 4359 flow. Second operand 33 states and 305 transitions. [2023-11-29 06:33:35,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 567 transitions, 8222 flow [2023-11-29 06:33:36,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 567 transitions, 8093 flow, removed 41 selfloop flow, removed 8 redundant places. [2023-11-29 06:33:36,140 INFO L231 Difference]: Finished difference. Result has 235 places, 421 transitions, 6442 flow [2023-11-29 06:33:36,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=6442, PETRI_PLACES=235, PETRI_TRANSITIONS=421} [2023-11-29 06:33:36,140 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 209 predicate places. [2023-11-29 06:33:36,140 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 421 transitions, 6442 flow [2023-11-29 06:33:36,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.902439024390244) internal successors, (201), 41 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:36,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:36,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:36,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 06:33:36,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:36,341 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:36,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1314712815, now seen corresponding path program 15 times [2023-11-29 06:33:36,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:36,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111596850] [2023-11-29 06:33:36,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:36,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:37,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:37,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111596850] [2023-11-29 06:33:37,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111596850] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:37,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141099803] [2023-11-29 06:33:37,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:33:37,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:37,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:37,036 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:37,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:33:37,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:33:37,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:37,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 06:33:37,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:37,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:37,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-11-29 06:33:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:37,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:38,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:38,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2023-11-29 06:33:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:38,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141099803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:38,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:38,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 16] total 44 [2023-11-29 06:33:38,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039196121] [2023-11-29 06:33:38,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:38,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 06:33:38,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 06:33:38,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 06:33:38,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:33:38,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 421 transitions, 6442 flow. Second operand has 45 states, 45 states have (on average 4.733333333333333) internal successors, (213), 45 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:38,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:38,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:33:38,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:41,758 INFO L124 PetriNetUnfolderBase]: 2536/4315 cut-off events. [2023-11-29 06:33:41,758 INFO L125 PetriNetUnfolderBase]: For 60361/60361 co-relation queries the response was YES. [2023-11-29 06:33:41,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32995 conditions, 4315 events. 2536/4315 cut-off events. For 60361/60361 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 25428 event pairs, 130 based on Foata normal form. 2/4317 useless extension candidates. Maximal degree in co-relation 32890. Up to 2097 conditions per place. [2023-11-29 06:33:41,794 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 293 selfloop transitions, 463 changer transitions 8/765 dead transitions. [2023-11-29 06:33:41,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 765 transitions, 12535 flow [2023-11-29 06:33:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 06:33:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-29 06:33:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 428 transitions. [2023-11-29 06:33:41,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3230188679245283 [2023-11-29 06:33:41,796 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 428 transitions. [2023-11-29 06:33:41,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 428 transitions. [2023-11-29 06:33:41,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:41,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 428 transitions. [2023-11-29 06:33:41,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 8.075471698113208) internal successors, (428), 53 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:41,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 25.0) internal successors, (1350), 54 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:41,801 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 25.0) internal successors, (1350), 54 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:41,801 INFO L175 Difference]: Start difference. First operand has 235 places, 421 transitions, 6442 flow. Second operand 53 states and 428 transitions. [2023-11-29 06:33:41,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 765 transitions, 12535 flow [2023-11-29 06:33:42,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 765 transitions, 12119 flow, removed 162 selfloop flow, removed 15 redundant places. [2023-11-29 06:33:42,094 INFO L231 Difference]: Finished difference. Result has 292 places, 626 transitions, 11349 flow [2023-11-29 06:33:42,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=11349, PETRI_PLACES=292, PETRI_TRANSITIONS=626} [2023-11-29 06:33:42,095 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 266 predicate places. [2023-11-29 06:33:42,095 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 626 transitions, 11349 flow [2023-11-29 06:33:42,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.733333333333333) internal successors, (213), 45 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:42,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:42,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:42,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:33:42,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:42,296 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:42,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1458395431, now seen corresponding path program 16 times [2023-11-29 06:33:42,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:42,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746776706] [2023-11-29 06:33:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:42,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:42,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:42,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746776706] [2023-11-29 06:33:42,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746776706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:42,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681274901] [2023-11-29 06:33:42,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:33:42,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:42,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:42,992 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:42,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:33:43,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:33:43,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:43,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:33:43,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:43,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:43,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:43,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-29 06:33:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:43,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681274901] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:43,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:43,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 31 [2023-11-29 06:33:43,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499556954] [2023-11-29 06:33:43,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:43,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:33:43,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:33:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:33:43,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:33:43,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 626 transitions, 11349 flow. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:43,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:43,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:33:43,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:46,014 INFO L124 PetriNetUnfolderBase]: 2738/4661 cut-off events. [2023-11-29 06:33:46,014 INFO L125 PetriNetUnfolderBase]: For 83109/83109 co-relation queries the response was YES. [2023-11-29 06:33:46,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40507 conditions, 4661 events. 2738/4661 cut-off events. For 83109/83109 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27928 event pairs, 198 based on Foata normal form. 1/4662 useless extension candidates. Maximal degree in co-relation 40407. Up to 3207 conditions per place. [2023-11-29 06:33:46,063 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 473 selfloop transitions, 311 changer transitions 1/786 dead transitions. [2023-11-29 06:33:46,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 786 transitions, 15420 flow [2023-11-29 06:33:46,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 06:33:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 06:33:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 247 transitions. [2023-11-29 06:33:46,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3406896551724138 [2023-11-29 06:33:46,065 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 247 transitions. [2023-11-29 06:33:46,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 247 transitions. [2023-11-29 06:33:46,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:46,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 247 transitions. [2023-11-29 06:33:46,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 8.517241379310345) internal successors, (247), 29 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:46,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 25.0) internal successors, (750), 30 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:46,068 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 25.0) internal successors, (750), 30 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:46,068 INFO L175 Difference]: Start difference. First operand has 292 places, 626 transitions, 11349 flow. Second operand 29 states and 247 transitions. [2023-11-29 06:33:46,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 786 transitions, 15420 flow [2023-11-29 06:33:46,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 786 transitions, 14534 flow, removed 395 selfloop flow, removed 14 redundant places. [2023-11-29 06:33:46,678 INFO L231 Difference]: Finished difference. Result has 311 places, 682 transitions, 12954 flow [2023-11-29 06:33:46,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10608, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12954, PETRI_PLACES=311, PETRI_TRANSITIONS=682} [2023-11-29 06:33:46,679 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 285 predicate places. [2023-11-29 06:33:46,679 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 682 transitions, 12954 flow [2023-11-29 06:33:46,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:46,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:46,680 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:46,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:33:46,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:46,881 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:46,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:46,882 INFO L85 PathProgramCache]: Analyzing trace with hash -562804759, now seen corresponding path program 17 times [2023-11-29 06:33:46,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:46,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870736293] [2023-11-29 06:33:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:46,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:47,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870736293] [2023-11-29 06:33:47,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870736293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618496043] [2023-11-29 06:33:47,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:33:47,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:47,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:47,460 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:47,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:33:47,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 06:33:47,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:47,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 06:33:47,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:47,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:47,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:47,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-29 06:33:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:48,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618496043] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:48,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:48,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 31 [2023-11-29 06:33:48,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249613098] [2023-11-29 06:33:48,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:48,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:33:48,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:48,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:33:48,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:33:48,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:33:48,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 682 transitions, 12954 flow. Second operand has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:48,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:48,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:33:48,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:51,043 INFO L124 PetriNetUnfolderBase]: 3164/5363 cut-off events. [2023-11-29 06:33:51,043 INFO L125 PetriNetUnfolderBase]: For 109880/109880 co-relation queries the response was YES. [2023-11-29 06:33:51,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49158 conditions, 5363 events. 3164/5363 cut-off events. For 109880/109880 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 32423 event pairs, 318 based on Foata normal form. 2/5365 useless extension candidates. Maximal degree in co-relation 49026. Up to 4645 conditions per place. [2023-11-29 06:33:51,131 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 719 selfloop transitions, 173 changer transitions 2/895 dead transitions. [2023-11-29 06:33:51,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 895 transitions, 18605 flow [2023-11-29 06:33:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 06:33:51,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 06:33:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 282 transitions. [2023-11-29 06:33:51,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3525 [2023-11-29 06:33:51,133 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 282 transitions. [2023-11-29 06:33:51,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 282 transitions. [2023-11-29 06:33:51,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:51,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 282 transitions. [2023-11-29 06:33:51,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 8.8125) internal successors, (282), 32 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:51,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 25.0) internal successors, (825), 33 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:51,136 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 25.0) internal successors, (825), 33 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:51,137 INFO L175 Difference]: Start difference. First operand has 311 places, 682 transitions, 12954 flow. Second operand 32 states and 282 transitions. [2023-11-29 06:33:51,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 895 transitions, 18605 flow [2023-11-29 06:33:51,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 895 transitions, 18268 flow, removed 113 selfloop flow, removed 16 redundant places. [2023-11-29 06:33:51,837 INFO L231 Difference]: Finished difference. Result has 344 places, 798 transitions, 15939 flow [2023-11-29 06:33:51,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12662, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=15939, PETRI_PLACES=344, PETRI_TRANSITIONS=798} [2023-11-29 06:33:51,838 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 318 predicate places. [2023-11-29 06:33:51,838 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 798 transitions, 15939 flow [2023-11-29 06:33:51,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:51,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:51,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:51,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:33:52,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:52,039 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:52,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:52,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1965269479, now seen corresponding path program 18 times [2023-11-29 06:33:52,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:52,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725924222] [2023-11-29 06:33:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:52,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:52,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:52,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725924222] [2023-11-29 06:33:52,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725924222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:52,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920672560] [2023-11-29 06:33:52,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:33:52,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:52,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:52,673 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:52,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:33:52,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 06:33:52,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:33:52,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 06:33:52,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:53,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:53,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:53,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-29 06:33:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:53,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920672560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:53,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:53,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2023-11-29 06:33:53,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277977212] [2023-11-29 06:33:53,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:53,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 06:33:53,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:53,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 06:33:53,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:33:53,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:33:53,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 798 transitions, 15939 flow. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:53,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:53,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:33:53,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:33:56,740 INFO L124 PetriNetUnfolderBase]: 3495/5940 cut-off events. [2023-11-29 06:33:56,740 INFO L125 PetriNetUnfolderBase]: For 133688/133688 co-relation queries the response was YES. [2023-11-29 06:33:56,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56304 conditions, 5940 events. 3495/5940 cut-off events. For 133688/133688 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 36857 event pairs, 266 based on Foata normal form. 1/5941 useless extension candidates. Maximal degree in co-relation 56152. Up to 3915 conditions per place. [2023-11-29 06:33:56,812 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 615 selfloop transitions, 401 changer transitions 1/1018 dead transitions. [2023-11-29 06:33:56,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1018 transitions, 21529 flow [2023-11-29 06:33:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 06:33:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 06:33:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 281 transitions. [2023-11-29 06:33:56,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36258064516129035 [2023-11-29 06:33:56,814 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 281 transitions. [2023-11-29 06:33:56,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 281 transitions. [2023-11-29 06:33:56,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:33:56,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 281 transitions. [2023-11-29 06:33:56,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 9.064516129032258) internal successors, (281), 31 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:56,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 25.0) internal successors, (800), 32 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:56,816 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 25.0) internal successors, (800), 32 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:56,816 INFO L175 Difference]: Start difference. First operand has 344 places, 798 transitions, 15939 flow. Second operand 31 states and 281 transitions. [2023-11-29 06:33:56,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1018 transitions, 21529 flow [2023-11-29 06:33:57,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1018 transitions, 21024 flow, removed 239 selfloop flow, removed 8 redundant places. [2023-11-29 06:33:57,738 INFO L231 Difference]: Finished difference. Result has 373 places, 863 transitions, 18462 flow [2023-11-29 06:33:57,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=15434, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=18462, PETRI_PLACES=373, PETRI_TRANSITIONS=863} [2023-11-29 06:33:57,740 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 347 predicate places. [2023-11-29 06:33:57,740 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 863 transitions, 18462 flow [2023-11-29 06:33:57,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:57,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:33:57,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:33:57,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:33:57,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 06:33:57,941 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:33:57,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:33:57,941 INFO L85 PathProgramCache]: Analyzing trace with hash 52031751, now seen corresponding path program 19 times [2023-11-29 06:33:57,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:33:57,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949426601] [2023-11-29 06:33:57,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:33:57,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:33:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:33:58,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:33:58,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949426601] [2023-11-29 06:33:58,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949426601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:33:58,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117427535] [2023-11-29 06:33:58,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:33:58,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:33:58,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:33:58,543 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:33:58,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:33:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:33:58,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 06:33:58,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:33:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:33:58,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:33:59,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:33:59,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-29 06:33:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:33:59,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117427535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:33:59,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:33:59,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2023-11-29 06:33:59,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95838442] [2023-11-29 06:33:59,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:33:59,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 06:33:59,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:33:59,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 06:33:59,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:33:59,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:33:59,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 863 transitions, 18462 flow. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:33:59,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:33:59,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:33:59,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:34:03,267 INFO L124 PetriNetUnfolderBase]: 3781/6414 cut-off events. [2023-11-29 06:34:03,268 INFO L125 PetriNetUnfolderBase]: For 171668/171668 co-relation queries the response was YES. [2023-11-29 06:34:03,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64368 conditions, 6414 events. 3781/6414 cut-off events. For 171668/171668 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 39952 event pairs, 404 based on Foata normal form. 2/6416 useless extension candidates. Maximal degree in co-relation 64207. Up to 5626 conditions per place. [2023-11-29 06:34:03,355 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 828 selfloop transitions, 187 changer transitions 2/1018 dead transitions. [2023-11-29 06:34:03,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1018 transitions, 23419 flow [2023-11-29 06:34:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 06:34:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 06:34:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 263 transitions. [2023-11-29 06:34:03,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627586206896552 [2023-11-29 06:34:03,357 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 263 transitions. [2023-11-29 06:34:03,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 263 transitions. [2023-11-29 06:34:03,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:34:03,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 263 transitions. [2023-11-29 06:34:03,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 9.068965517241379) internal successors, (263), 29 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:03,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 25.0) internal successors, (750), 30 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:03,359 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 25.0) internal successors, (750), 30 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:03,359 INFO L175 Difference]: Start difference. First operand has 373 places, 863 transitions, 18462 flow. Second operand 29 states and 263 transitions. [2023-11-29 06:34:03,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1018 transitions, 23419 flow [2023-11-29 06:34:04,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1018 transitions, 23049 flow, removed 93 selfloop flow, removed 25 redundant places. [2023-11-29 06:34:04,532 INFO L231 Difference]: Finished difference. Result has 387 places, 924 transitions, 20342 flow [2023-11-29 06:34:04,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=18099, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=20342, PETRI_PLACES=387, PETRI_TRANSITIONS=924} [2023-11-29 06:34:04,533 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 361 predicate places. [2023-11-29 06:34:04,533 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 924 transitions, 20342 flow [2023-11-29 06:34:04,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:04,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:34:04,533 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:34:04,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 06:34:04,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:04,733 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:34:04,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:34:04,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1670435151, now seen corresponding path program 20 times [2023-11-29 06:34:04,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:34:04,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50712165] [2023-11-29 06:34:04,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:34:04,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:34:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:34:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:34:05,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:34:05,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50712165] [2023-11-29 06:34:05,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50712165] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:34:05,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234357008] [2023-11-29 06:34:05,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:34:05,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:05,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:34:05,298 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:34:05,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:34:05,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:34:05,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:34:05,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:34:05,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:34:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:34:05,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:34:05,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:34:05,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-29 06:34:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:34:05,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234357008] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:34:05,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:34:05,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 31 [2023-11-29 06:34:05,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222150538] [2023-11-29 06:34:05,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:34:05,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:34:05,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:34:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:34:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:34:06,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:34:06,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 924 transitions, 20342 flow. Second operand has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:06,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:34:06,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:34:06,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:34:10,527 INFO L124 PetriNetUnfolderBase]: 4041/6846 cut-off events. [2023-11-29 06:34:10,527 INFO L125 PetriNetUnfolderBase]: For 198262/198262 co-relation queries the response was YES. [2023-11-29 06:34:10,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70954 conditions, 6846 events. 4041/6846 cut-off events. For 198262/198262 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 42854 event pairs, 426 based on Foata normal form. 2/6848 useless extension candidates. Maximal degree in co-relation 70785. Up to 6015 conditions per place. [2023-11-29 06:34:10,622 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 876 selfloop transitions, 198 changer transitions 2/1077 dead transitions. [2023-11-29 06:34:10,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 1077 transitions, 25597 flow [2023-11-29 06:34:10,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 06:34:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 06:34:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 283 transitions. [2023-11-29 06:34:10,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35375 [2023-11-29 06:34:10,623 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 283 transitions. [2023-11-29 06:34:10,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 283 transitions. [2023-11-29 06:34:10,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:34:10,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 283 transitions. [2023-11-29 06:34:10,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 8.84375) internal successors, (283), 32 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:10,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 25.0) internal successors, (825), 33 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:10,625 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 25.0) internal successors, (825), 33 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:10,625 INFO L175 Difference]: Start difference. First operand has 387 places, 924 transitions, 20342 flow. Second operand 32 states and 283 transitions. [2023-11-29 06:34:10,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 1077 transitions, 25597 flow [2023-11-29 06:34:12,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 1077 transitions, 25146 flow, removed 176 selfloop flow, removed 14 redundant places. [2023-11-29 06:34:12,236 INFO L231 Difference]: Finished difference. Result has 412 places, 977 transitions, 22152 flow [2023-11-29 06:34:12,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=19891, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=22152, PETRI_PLACES=412, PETRI_TRANSITIONS=977} [2023-11-29 06:34:12,237 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 386 predicate places. [2023-11-29 06:34:12,237 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 977 transitions, 22152 flow [2023-11-29 06:34:12,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:12,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:34:12,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:34:12,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:34:12,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:12,438 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:34:12,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:34:12,438 INFO L85 PathProgramCache]: Analyzing trace with hash 221863747, now seen corresponding path program 21 times [2023-11-29 06:34:12,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:34:12,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646177546] [2023-11-29 06:34:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:34:12,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:34:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:34:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:34:13,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:34:13,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646177546] [2023-11-29 06:34:13,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646177546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:34:13,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535834298] [2023-11-29 06:34:13,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:34:13,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:13,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:34:13,070 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:34:13,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:34:13,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 06:34:13,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:34:13,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 06:34:13,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:34:13,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 06:34:13,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:34:13,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-11-29 06:34:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:34:13,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:34:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:34:13,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535834298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:34:13,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:34:13,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 39 [2023-11-29 06:34:13,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139550250] [2023-11-29 06:34:13,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:34:13,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 06:34:13,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:34:13,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 06:34:13,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 06:34:13,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:34:13,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 977 transitions, 22152 flow. Second operand has 40 states, 40 states have (on average 4.925) internal successors, (197), 40 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:13,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:34:13,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:34:13,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:34:21,649 INFO L124 PetriNetUnfolderBase]: 5070/8627 cut-off events. [2023-11-29 06:34:21,649 INFO L125 PetriNetUnfolderBase]: For 280133/280133 co-relation queries the response was YES. [2023-11-29 06:34:21,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92951 conditions, 8627 events. 5070/8627 cut-off events. For 280133/280133 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 57277 event pairs, 250 based on Foata normal form. 2/8629 useless extension candidates. Maximal degree in co-relation 92773. Up to 4142 conditions per place. [2023-11-29 06:34:21,778 INFO L140 encePairwiseOnDemand]: 10/25 looper letters, 442 selfloop transitions, 1189 changer transitions 7/1639 dead transitions. [2023-11-29 06:34:21,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1639 transitions, 38638 flow [2023-11-29 06:34:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 06:34:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-11-29 06:34:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 591 transitions. [2023-11-29 06:34:21,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31105263157894736 [2023-11-29 06:34:21,780 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 591 transitions. [2023-11-29 06:34:21,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 591 transitions. [2023-11-29 06:34:21,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:34:21,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 591 transitions. [2023-11-29 06:34:21,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 7.776315789473684) internal successors, (591), 76 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:21,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 25.0) internal successors, (1925), 77 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:21,787 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 25.0) internal successors, (1925), 77 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:21,787 INFO L175 Difference]: Start difference. First operand has 412 places, 977 transitions, 22152 flow. Second operand 76 states and 591 transitions. [2023-11-29 06:34:21,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1639 transitions, 38638 flow [2023-11-29 06:34:24,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1639 transitions, 37879 flow, removed 296 selfloop flow, removed 22 redundant places. [2023-11-29 06:34:24,273 INFO L231 Difference]: Finished difference. Result has 484 places, 1470 transitions, 37835 flow [2023-11-29 06:34:24,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=21538, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=726, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=37835, PETRI_PLACES=484, PETRI_TRANSITIONS=1470} [2023-11-29 06:34:24,274 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 458 predicate places. [2023-11-29 06:34:24,274 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 1470 transitions, 37835 flow [2023-11-29 06:34:24,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.925) internal successors, (197), 40 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:24,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:34:24,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:34:24,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:34:24,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 06:34:24,475 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:34:24,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:34:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1739047553, now seen corresponding path program 22 times [2023-11-29 06:34:24,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:34:24,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666280456] [2023-11-29 06:34:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:34:24,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:34:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:34:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:34:24,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:34:24,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666280456] [2023-11-29 06:34:24,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666280456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:34:24,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532065507] [2023-11-29 06:34:24,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:34:24,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:24,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:34:24,955 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:34:24,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:34:25,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:34:25,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:34:25,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:34:25,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:34:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:34:25,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:34:25,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:34:25,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-29 06:34:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:34:25,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532065507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:34:25,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:34:25,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 31 [2023-11-29 06:34:25,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449376439] [2023-11-29 06:34:25,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:34:25,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:34:25,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:34:25,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:34:25,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:34:25,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:34:25,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1470 transitions, 37835 flow. Second operand has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:25,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:34:25,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:34:25,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:34:32,431 INFO L124 PetriNetUnfolderBase]: 5294/9021 cut-off events. [2023-11-29 06:34:32,431 INFO L125 PetriNetUnfolderBase]: For 358950/358950 co-relation queries the response was YES. [2023-11-29 06:34:32,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107705 conditions, 9021 events. 5294/9021 cut-off events. For 358950/358950 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 60468 event pairs, 440 based on Foata normal form. 1/9022 useless extension candidates. Maximal degree in co-relation 107507. Up to 6429 conditions per place. [2023-11-29 06:34:32,568 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 924 selfloop transitions, 704 changer transitions 1/1630 dead transitions. [2023-11-29 06:34:32,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 1630 transitions, 44900 flow [2023-11-29 06:34:32,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:34:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 06:34:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 242 transitions. [2023-11-29 06:34:32,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3457142857142857 [2023-11-29 06:34:32,569 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 242 transitions. [2023-11-29 06:34:32,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 242 transitions. [2023-11-29 06:34:32,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:34:32,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 242 transitions. [2023-11-29 06:34:32,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 8.642857142857142) internal successors, (242), 28 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:32,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 25.0) internal successors, (725), 29 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:32,571 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 25.0) internal successors, (725), 29 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:32,571 INFO L175 Difference]: Start difference. First operand has 484 places, 1470 transitions, 37835 flow. Second operand 28 states and 242 transitions. [2023-11-29 06:34:32,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 1630 transitions, 44900 flow [2023-11-29 06:34:37,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 1630 transitions, 43226 flow, removed 742 selfloop flow, removed 26 redundant places. [2023-11-29 06:34:37,068 INFO L231 Difference]: Finished difference. Result has 494 places, 1525 transitions, 40243 flow [2023-11-29 06:34:37,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=36391, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=654, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=40243, PETRI_PLACES=494, PETRI_TRANSITIONS=1525} [2023-11-29 06:34:37,070 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 468 predicate places. [2023-11-29 06:34:37,070 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 1525 transitions, 40243 flow [2023-11-29 06:34:37,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.15625) internal successors, (165), 32 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:37,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:34:37,070 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:34:37,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 06:34:37,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 06:34:37,271 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:34:37,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:34:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1144086779, now seen corresponding path program 23 times [2023-11-29 06:34:37,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:34:37,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603371734] [2023-11-29 06:34:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:34:37,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:34:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:34:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:34:37,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:34:37,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603371734] [2023-11-29 06:34:37,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603371734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:34:37,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814826319] [2023-11-29 06:34:37,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:34:37,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:37,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:34:37,776 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:34:37,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 06:34:37,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:34:37,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:34:37,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 06:34:37,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:34:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:34:38,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:34:38,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:34:38,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2023-11-29 06:34:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:34:38,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814826319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:34:38,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:34:38,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2023-11-29 06:34:38,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075239972] [2023-11-29 06:34:38,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:34:38,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 06:34:38,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:34:38,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 06:34:38,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:34:38,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:34:38,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 1525 transitions, 40243 flow. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:38,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:34:38,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:34:38,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:34:45,525 INFO L124 PetriNetUnfolderBase]: 5429/9245 cut-off events. [2023-11-29 06:34:45,526 INFO L125 PetriNetUnfolderBase]: For 385321/385321 co-relation queries the response was YES. [2023-11-29 06:34:45,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112151 conditions, 9245 events. 5429/9245 cut-off events. For 385321/385321 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 62181 event pairs, 344 based on Foata normal form. 1/9246 useless extension candidates. Maximal degree in co-relation 111946. Up to 6674 conditions per place. [2023-11-29 06:34:45,720 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 983 selfloop transitions, 670 changer transitions 1/1655 dead transitions. [2023-11-29 06:34:45,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 1655 transitions, 46144 flow [2023-11-29 06:34:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 06:34:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 06:34:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 249 transitions. [2023-11-29 06:34:45,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3688888888888889 [2023-11-29 06:34:45,722 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 249 transitions. [2023-11-29 06:34:45,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 249 transitions. [2023-11-29 06:34:45,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:34:45,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 249 transitions. [2023-11-29 06:34:45,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 9.222222222222221) internal successors, (249), 27 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:45,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 25.0) internal successors, (700), 28 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:45,725 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 25.0) internal successors, (700), 28 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:45,725 INFO L175 Difference]: Start difference. First operand has 494 places, 1525 transitions, 40243 flow. Second operand 27 states and 249 transitions. [2023-11-29 06:34:45,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 1655 transitions, 46144 flow [2023-11-29 06:34:50,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1655 transitions, 45624 flow, removed 198 selfloop flow, removed 15 redundant places. [2023-11-29 06:34:50,355 INFO L231 Difference]: Finished difference. Result has 508 places, 1551 transitions, 42805 flow [2023-11-29 06:34:50,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=39740, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=645, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=867, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=42805, PETRI_PLACES=508, PETRI_TRANSITIONS=1551} [2023-11-29 06:34:50,357 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 482 predicate places. [2023-11-29 06:34:50,357 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 1551 transitions, 42805 flow [2023-11-29 06:34:50,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:50,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:34:50,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:34:50,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-29 06:34:50,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 06:34:50,558 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:34:50,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:34:50,558 INFO L85 PathProgramCache]: Analyzing trace with hash 74313497, now seen corresponding path program 24 times [2023-11-29 06:34:50,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:34:50,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628229572] [2023-11-29 06:34:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:34:50,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:34:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:34:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:34:51,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:34:51,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628229572] [2023-11-29 06:34:51,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628229572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:34:51,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922479293] [2023-11-29 06:34:51,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:34:51,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:51,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:34:51,041 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:34:51,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 06:34:51,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 06:34:51,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:34:51,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 06:34:51,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:34:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:34:51,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:34:51,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:34:51,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-29 06:34:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:34:51,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922479293] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:34:51,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:34:51,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2023-11-29 06:34:51,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480364442] [2023-11-29 06:34:51,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:34:51,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 06:34:51,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:34:51,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 06:34:51,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:34:51,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:34:51,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 1551 transitions, 42805 flow. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:34:51,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:34:51,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:34:51,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:00,304 INFO L124 PetriNetUnfolderBase]: 5990/10163 cut-off events. [2023-11-29 06:35:00,304 INFO L125 PetriNetUnfolderBase]: For 477578/477578 co-relation queries the response was YES. [2023-11-29 06:35:00,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129406 conditions, 10163 events. 5990/10163 cut-off events. For 477578/477578 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 69030 event pairs, 502 based on Foata normal form. 2/10165 useless extension candidates. Maximal degree in co-relation 129197. Up to 8997 conditions per place. [2023-11-29 06:35:00,498 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 1528 selfloop transitions, 299 changer transitions 2/1830 dead transitions. [2023-11-29 06:35:00,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 1830 transitions, 54537 flow [2023-11-29 06:35:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 06:35:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 06:35:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 264 transitions. [2023-11-29 06:35:00,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.352 [2023-11-29 06:35:00,500 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 264 transitions. [2023-11-29 06:35:00,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 264 transitions. [2023-11-29 06:35:00,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:00,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 264 transitions. [2023-11-29 06:35:00,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 8.8) internal successors, (264), 30 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:00,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 25.0) internal successors, (775), 31 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:00,502 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 25.0) internal successors, (775), 31 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:00,502 INFO L175 Difference]: Start difference. First operand has 508 places, 1551 transitions, 42805 flow. Second operand 30 states and 264 transitions. [2023-11-29 06:35:00,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 1830 transitions, 54537 flow [2023-11-29 06:35:07,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 1830 transitions, 54141 flow, removed 120 selfloop flow, removed 19 redundant places. [2023-11-29 06:35:07,734 INFO L231 Difference]: Finished difference. Result has 531 places, 1703 transitions, 49129 flow [2023-11-29 06:35:07,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=42435, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=49129, PETRI_PLACES=531, PETRI_TRANSITIONS=1703} [2023-11-29 06:35:07,736 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 505 predicate places. [2023-11-29 06:35:07,736 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 1703 transitions, 49129 flow [2023-11-29 06:35:07,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:07,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:07,737 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:07,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 06:35:07,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 06:35:07,937 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:35:07,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash -121280073, now seen corresponding path program 25 times [2023-11-29 06:35:07,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:07,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750871468] [2023-11-29 06:35:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:07,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:35:08,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:08,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750871468] [2023-11-29 06:35:08,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750871468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:08,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33030862] [2023-11-29 06:35:08,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:35:08,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:08,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:08,519 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:08,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 06:35:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:08,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 06:35:08,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:35:08,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:09,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:35:09,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-29 06:35:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:09,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33030862] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:09,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:09,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 9] total 33 [2023-11-29 06:35:09,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023183993] [2023-11-29 06:35:09,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:09,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 06:35:09,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:09,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 06:35:09,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:35:09,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:35:09,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1703 transitions, 49129 flow. Second operand has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:09,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:09,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:35:09,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:19,709 INFO L124 PetriNetUnfolderBase]: 6358/10816 cut-off events. [2023-11-29 06:35:19,709 INFO L125 PetriNetUnfolderBase]: For 549811/549811 co-relation queries the response was YES. [2023-11-29 06:35:19,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141338 conditions, 10816 events. 6358/10816 cut-off events. For 549811/549811 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 74813 event pairs, 396 based on Foata normal form. 1/10817 useless extension candidates. Maximal degree in co-relation 141116. Up to 7410 conditions per place. [2023-11-29 06:35:19,961 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 1133 selfloop transitions, 855 changer transitions 1/1990 dead transitions. [2023-11-29 06:35:19,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 1990 transitions, 59833 flow [2023-11-29 06:35:19,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 06:35:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 06:35:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 264 transitions. [2023-11-29 06:35:19,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641379310344828 [2023-11-29 06:35:19,962 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 264 transitions. [2023-11-29 06:35:19,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 264 transitions. [2023-11-29 06:35:19,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:19,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 264 transitions. [2023-11-29 06:35:19,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 9.10344827586207) internal successors, (264), 29 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:19,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 25.0) internal successors, (750), 30 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:19,964 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 25.0) internal successors, (750), 30 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:19,965 INFO L175 Difference]: Start difference. First operand has 531 places, 1703 transitions, 49129 flow. Second operand 29 states and 264 transitions. [2023-11-29 06:35:19,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 1990 transitions, 59833 flow [2023-11-29 06:35:28,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 1990 transitions, 58366 flow, removed 637 selfloop flow, removed 18 redundant places. [2023-11-29 06:35:28,468 INFO L231 Difference]: Finished difference. Result has 551 places, 1805 transitions, 54548 flow [2023-11-29 06:35:28,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=47665, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=760, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=884, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=54548, PETRI_PLACES=551, PETRI_TRANSITIONS=1805} [2023-11-29 06:35:28,470 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 525 predicate places. [2023-11-29 06:35:28,470 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 1805 transitions, 54548 flow [2023-11-29 06:35:28,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:28,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:28,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:28,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 06:35:28,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:28,671 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:35:28,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1592654409, now seen corresponding path program 26 times [2023-11-29 06:35:28,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:28,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527034457] [2023-11-29 06:35:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:28,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:35:29,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:29,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527034457] [2023-11-29 06:35:29,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527034457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:29,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309178439] [2023-11-29 06:35:29,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:35:29,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:29,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:29,265 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:29,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 06:35:29,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:35:29,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:29,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:35:29,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:29,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:29,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:35:29,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-29 06:35:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:35:29,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309178439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:29,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:29,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 28 [2023-11-29 06:35:29,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717823186] [2023-11-29 06:35:29,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:29,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 06:35:29,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:29,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 06:35:29,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:35:29,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:35:29,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 1805 transitions, 54548 flow. Second operand has 29 states, 29 states have (on average 5.275862068965517) internal successors, (153), 29 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 06:35:29,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:29,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:35:29,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:35:41,522 INFO L124 PetriNetUnfolderBase]: 6461/10992 cut-off events. [2023-11-29 06:35:41,522 INFO L125 PetriNetUnfolderBase]: For 627460/627460 co-relation queries the response was YES. [2023-11-29 06:35:41,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149713 conditions, 10992 events. 6461/10992 cut-off events. For 627460/627460 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 76212 event pairs, 602 based on Foata normal form. 1/10993 useless extension candidates. Maximal degree in co-relation 149483. Up to 10514 conditions per place. [2023-11-29 06:35:41,767 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 1782 selfloop transitions, 105 changer transitions 1/1889 dead transitions. [2023-11-29 06:35:41,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 1889 transitions, 60696 flow [2023-11-29 06:35:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 06:35:41,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 06:35:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 175 transitions. [2023-11-29 06:35:41,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2023-11-29 06:35:41,768 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 175 transitions. [2023-11-29 06:35:41,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 175 transitions. [2023-11-29 06:35:41,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:35:41,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 175 transitions. [2023-11-29 06:35:41,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 8.75) internal successors, (175), 20 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:41,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 25.0) internal successors, (525), 21 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:41,770 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 25.0) internal successors, (525), 21 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:41,770 INFO L175 Difference]: Start difference. First operand has 551 places, 1805 transitions, 54548 flow. Second operand 20 states and 175 transitions. [2023-11-29 06:35:41,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 1889 transitions, 60696 flow [2023-11-29 06:35:51,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1889 transitions, 59896 flow, removed 315 selfloop flow, removed 17 redundant places. [2023-11-29 06:35:51,441 INFO L231 Difference]: Finished difference. Result has 556 places, 1825 transitions, 54970 flow [2023-11-29 06:35:51,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=53752, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=54970, PETRI_PLACES=556, PETRI_TRANSITIONS=1825} [2023-11-29 06:35:51,443 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 530 predicate places. [2023-11-29 06:35:51,443 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 1825 transitions, 54970 flow [2023-11-29 06:35:51,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.275862068965517) internal successors, (153), 29 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 06:35:51,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:35:51,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:51,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 06:35:51,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:51,644 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:35:51,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1549561383, now seen corresponding path program 27 times [2023-11-29 06:35:51,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:51,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838248319] [2023-11-29 06:35:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:51,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:35:52,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:52,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838248319] [2023-11-29 06:35:52,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838248319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:52,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451987749] [2023-11-29 06:35:52,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:35:52,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:52,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:52,264 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:52,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 06:35:52,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:35:52,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:52,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 06:35:52,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:52,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 06:35:52,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:35:52,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-11-29 06:35:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:35:52,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:53,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-11-29 06:35:53,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:35:53,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 66 [2023-11-29 06:35:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:35:53,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451987749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:35:53,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:35:53,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 45 [2023-11-29 06:35:53,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175707704] [2023-11-29 06:35:53,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:35:53,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 06:35:53,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:53,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 06:35:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1690, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 06:35:54,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:35:54,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 1825 transitions, 54970 flow. Second operand has 46 states, 46 states have (on average 4.695652173913044) internal successors, (216), 46 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:35:54,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:35:54,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:35:54,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:07,234 INFO L124 PetriNetUnfolderBase]: 6664/11345 cut-off events. [2023-11-29 06:36:07,234 INFO L125 PetriNetUnfolderBase]: For 641372/641372 co-relation queries the response was YES. [2023-11-29 06:36:07,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154494 conditions, 11345 events. 6664/11345 cut-off events. For 641372/641372 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 79189 event pairs, 394 based on Foata normal form. 2/11347 useless extension candidates. Maximal degree in co-relation 154262. Up to 6754 conditions per place. [2023-11-29 06:36:07,487 INFO L140 encePairwiseOnDemand]: 10/25 looper letters, 791 selfloop transitions, 1287 changer transitions 8/2087 dead transitions. [2023-11-29 06:36:07,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 602 places, 2087 transitions, 64619 flow [2023-11-29 06:36:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 06:36:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-29 06:36:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 374 transitions. [2023-11-29 06:36:07,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31829787234042556 [2023-11-29 06:36:07,489 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 374 transitions. [2023-11-29 06:36:07,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 374 transitions. [2023-11-29 06:36:07,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:07,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 374 transitions. [2023-11-29 06:36:07,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 7.957446808510638) internal successors, (374), 47 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:07,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 25.0) internal successors, (1200), 48 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:07,494 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 25.0) internal successors, (1200), 48 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:07,494 INFO L175 Difference]: Start difference. First operand has 556 places, 1825 transitions, 54970 flow. Second operand 47 states and 374 transitions. [2023-11-29 06:36:07,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 602 places, 2087 transitions, 64619 flow [2023-11-29 06:36:17,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 2087 transitions, 64355 flow, removed 100 selfloop flow, removed 11 redundant places. [2023-11-29 06:36:17,216 INFO L231 Difference]: Finished difference. Result has 606 places, 1948 transitions, 63466 flow [2023-11-29 06:36:17,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=54722, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=63466, PETRI_PLACES=606, PETRI_TRANSITIONS=1948} [2023-11-29 06:36:17,218 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 580 predicate places. [2023-11-29 06:36:17,219 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 1948 transitions, 63466 flow [2023-11-29 06:36:17,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.695652173913044) internal successors, (216), 46 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:17,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:17,219 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:17,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 06:36:17,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 06:36:17,420 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:36:17,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1764078329, now seen corresponding path program 28 times [2023-11-29 06:36:17,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:17,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232988987] [2023-11-29 06:36:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:17,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:17,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:17,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232988987] [2023-11-29 06:36:17,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232988987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:17,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916243397] [2023-11-29 06:36:17,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:36:17,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:17,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:17,866 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:17,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 06:36:18,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:36:18,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:18,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:36:18,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:18,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:18,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:18,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-29 06:36:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:18,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916243397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:18,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:18,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 21 [2023-11-29 06:36:18,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660310153] [2023-11-29 06:36:18,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:18,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 06:36:18,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:18,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 06:36:18,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:36:18,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2023-11-29 06:36:18,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 1948 transitions, 63466 flow. Second operand has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 22 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 06:36:18,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:18,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2023-11-29 06:36:18,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:28,625 INFO L124 PetriNetUnfolderBase]: 5870/10602 cut-off events. [2023-11-29 06:36:28,625 INFO L125 PetriNetUnfolderBase]: For 791302/791942 co-relation queries the response was YES. [2023-11-29 06:36:28,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164810 conditions, 10602 events. 5870/10602 cut-off events. For 791302/791942 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 79730 event pairs, 442 based on Foata normal form. 293/10849 useless extension candidates. Maximal degree in co-relation 164583. Up to 8139 conditions per place. [2023-11-29 06:36:28,870 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 1593 selfloop transitions, 141 changer transitions 2/2062 dead transitions. [2023-11-29 06:36:28,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 2062 transitions, 71150 flow [2023-11-29 06:36:28,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:36:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:36:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 191 transitions. [2023-11-29 06:36:28,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40210526315789474 [2023-11-29 06:36:28,872 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 191 transitions. [2023-11-29 06:36:28,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 191 transitions. [2023-11-29 06:36:28,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:28,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 191 transitions. [2023-11-29 06:36:28,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 10.052631578947368) internal successors, (191), 19 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:28,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 25.0) internal successors, (500), 20 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:28,873 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 25.0) internal successors, (500), 20 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:28,874 INFO L175 Difference]: Start difference. First operand has 606 places, 1948 transitions, 63466 flow. Second operand 19 states and 191 transitions. [2023-11-29 06:36:28,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 2062 transitions, 71150 flow [2023-11-29 06:36:39,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 2062 transitions, 70244 flow, removed 371 selfloop flow, removed 22 redundant places. [2023-11-29 06:36:39,561 INFO L231 Difference]: Finished difference. Result has 609 places, 2018 transitions, 66550 flow [2023-11-29 06:36:39,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=62624, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1847, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=66550, PETRI_PLACES=609, PETRI_TRANSITIONS=2018} [2023-11-29 06:36:39,563 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 583 predicate places. [2023-11-29 06:36:39,563 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 2018 transitions, 66550 flow [2023-11-29 06:36:39,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 22 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 06:36:39,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:36:39,564 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:39,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 06:36:39,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 06:36:39,764 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:36:39,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:39,765 INFO L85 PathProgramCache]: Analyzing trace with hash 596609377, now seen corresponding path program 29 times [2023-11-29 06:36:39,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:39,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536415152] [2023-11-29 06:36:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:39,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:36:40,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:40,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536415152] [2023-11-29 06:36:40,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536415152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:36:40,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027818596] [2023-11-29 06:36:40,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:36:40,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:40,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:40,336 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:40,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 06:36:40,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 06:36:40,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:36:40,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 06:36:40,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:40,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:36:40,738 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:36:40,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-29 06:36:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:36:40,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027818596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:36:40,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:36:40,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2023-11-29 06:36:40,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301180942] [2023-11-29 06:36:40,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:36:40,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 06:36:40,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:40,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 06:36:40,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:36:40,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:36:40,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 2018 transitions, 66550 flow. Second operand has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:40,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:36:40,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:36:40,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:36:54,189 INFO L124 PetriNetUnfolderBase]: 7121/12098 cut-off events. [2023-11-29 06:36:54,190 INFO L125 PetriNetUnfolderBase]: For 894177/894177 co-relation queries the response was YES. [2023-11-29 06:36:54,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181869 conditions, 12098 events. 7121/12098 cut-off events. For 894177/894177 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 84798 event pairs, 618 based on Foata normal form. 1/12099 useless extension candidates. Maximal degree in co-relation 181616. Up to 8799 conditions per place. [2023-11-29 06:36:54,476 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 1195 selfloop transitions, 989 changer transitions 1/2186 dead transitions. [2023-11-29 06:36:54,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 2186 transitions, 75634 flow [2023-11-29 06:36:54,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 06:36:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-29 06:36:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 283 transitions. [2023-11-29 06:36:54,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36516129032258066 [2023-11-29 06:36:54,478 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 283 transitions. [2023-11-29 06:36:54,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 283 transitions. [2023-11-29 06:36:54,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:36:54,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 283 transitions. [2023-11-29 06:36:54,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 9.129032258064516) internal successors, (283), 31 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:54,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 25.0) internal successors, (800), 32 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:54,481 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 25.0) internal successors, (800), 32 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:36:54,481 INFO L175 Difference]: Start difference. First operand has 609 places, 2018 transitions, 66550 flow. Second operand 31 states and 283 transitions. [2023-11-29 06:36:54,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 2186 transitions, 75634 flow [2023-11-29 06:37:07,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 2186 transitions, 74185 flow, removed 702 selfloop flow, removed 8 redundant places. [2023-11-29 06:37:07,483 INFO L231 Difference]: Finished difference. Result has 642 places, 2090 transitions, 71717 flow [2023-11-29 06:37:07,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=65409, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2018, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=923, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1064, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=71717, PETRI_PLACES=642, PETRI_TRANSITIONS=2090} [2023-11-29 06:37:07,484 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 616 predicate places. [2023-11-29 06:37:07,485 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 2090 transitions, 71717 flow [2023-11-29 06:37:07,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.068965517241379) internal successors, (147), 29 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:07,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:37:07,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:07,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 06:37:07,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 06:37:07,685 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:37:07,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1940020511, now seen corresponding path program 30 times [2023-11-29 06:37:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:07,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024390841] [2023-11-29 06:37:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:37:08,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:08,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024390841] [2023-11-29 06:37:08,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024390841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:08,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538865379] [2023-11-29 06:37:08,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:37:08,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:08,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:08,197 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:08,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 06:37:08,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 06:37:08,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:37:08,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 06:37:08,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:08,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:37:08,657 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:37:08,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-11-29 06:37:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:37:08,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:09,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2023-11-29 06:37:09,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:37:09,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 64 [2023-11-29 06:37:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:37:09,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538865379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:37:09,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:37:09,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2023-11-29 06:37:09,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565346514] [2023-11-29 06:37:09,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:09,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 06:37:09,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:09,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 06:37:09,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 06:37:09,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:37:09,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 2090 transitions, 71717 flow. Second operand has 44 states, 44 states have (on average 4.7272727272727275) internal successors, (208), 44 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:09,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:37:09,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:37:09,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:37:27,294 INFO L124 PetriNetUnfolderBase]: 8977/15212 cut-off events. [2023-11-29 06:37:27,294 INFO L125 PetriNetUnfolderBase]: For 1240688/1240688 co-relation queries the response was YES. [2023-11-29 06:37:27,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239947 conditions, 15212 events. 8977/15212 cut-off events. For 1240688/1240688 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 109662 event pairs, 673 based on Foata normal form. 3/15215 useless extension candidates. Maximal degree in co-relation 239222. Up to 9898 conditions per place. [2023-11-29 06:37:27,675 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 1553 selfloop transitions, 1445 changer transitions 7/3006 dead transitions. [2023-11-29 06:37:27,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 3006 transitions, 108669 flow [2023-11-29 06:37:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-29 06:37:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-11-29 06:37:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 680 transitions. [2023-11-29 06:37:27,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33170731707317075 [2023-11-29 06:37:27,677 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 680 transitions. [2023-11-29 06:37:27,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 680 transitions. [2023-11-29 06:37:27,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:37:27,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 680 transitions. [2023-11-29 06:37:27,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 8.292682926829269) internal successors, (680), 82 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:27,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 25.0) internal successors, (2075), 83 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:27,681 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 25.0) internal successors, (2075), 83 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:27,681 INFO L175 Difference]: Start difference. First operand has 642 places, 2090 transitions, 71717 flow. Second operand 82 states and 680 transitions. [2023-11-29 06:37:27,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 3006 transitions, 108669 flow [2023-11-29 06:37:47,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 3006 transitions, 107872 flow, removed 303 selfloop flow, removed 14 redundant places. [2023-11-29 06:37:47,939 INFO L231 Difference]: Finished difference. Result has 748 places, 2671 transitions, 99484 flow [2023-11-29 06:37:47,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=71152, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=905, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1040, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=99484, PETRI_PLACES=748, PETRI_TRANSITIONS=2671} [2023-11-29 06:37:47,940 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 722 predicate places. [2023-11-29 06:37:47,941 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 2671 transitions, 99484 flow [2023-11-29 06:37:47,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.7272727272727275) internal successors, (208), 44 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:47,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:37:47,941 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:37:47,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 06:37:48,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 06:37:48,141 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:37:48,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:37:48,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1357849175, now seen corresponding path program 31 times [2023-11-29 06:37:48,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:37:48,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906326462] [2023-11-29 06:37:48,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:37:48,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:37:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:37:48,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:37:48,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906326462] [2023-11-29 06:37:48,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906326462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:37:48,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452600545] [2023-11-29 06:37:48,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:37:48,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:37:48,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:37:48,658 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:37:48,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 06:37:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:37:48,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:37:48,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:37:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:37:48,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:37:49,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:37:49,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-29 06:37:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:37:49,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452600545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:37:49,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:37:49,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 29 [2023-11-29 06:37:49,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606644962] [2023-11-29 06:37:49,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:37:49,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 06:37:49,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:37:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 06:37:49,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:37:49,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:37:49,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 2671 transitions, 99484 flow. Second operand has 30 states, 30 states have (on average 5.466666666666667) internal successors, (164), 30 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:37:49,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:37:49,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:37:49,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:38:09,716 INFO L124 PetriNetUnfolderBase]: 9301/15752 cut-off events. [2023-11-29 06:38:09,716 INFO L125 PetriNetUnfolderBase]: For 1534014/1534014 co-relation queries the response was YES. [2023-11-29 06:38:10,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262772 conditions, 15752 events. 9301/15752 cut-off events. For 1534014/1534014 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 114181 event pairs, 774 based on Foata normal form. 2/15754 useless extension candidates. Maximal degree in co-relation 262311. Up to 14493 conditions per place. [2023-11-29 06:38:10,157 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 2513 selfloop transitions, 342 changer transitions 2/2858 dead transitions. [2023-11-29 06:38:10,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 774 places, 2858 transitions, 111882 flow [2023-11-29 06:38:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 06:38:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 06:38:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 252 transitions. [2023-11-29 06:38:10,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2023-11-29 06:38:10,159 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 252 transitions. [2023-11-29 06:38:10,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 252 transitions. [2023-11-29 06:38:10,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:38:10,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 252 transitions. [2023-11-29 06:38:10,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 9.333333333333334) internal successors, (252), 27 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:10,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 25.0) internal successors, (700), 28 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:10,160 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 25.0) internal successors, (700), 28 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:10,160 INFO L175 Difference]: Start difference. First operand has 748 places, 2671 transitions, 99484 flow. Second operand 27 states and 252 transitions. [2023-11-29 06:38:10,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 774 places, 2858 transitions, 111882 flow [2023-11-29 06:38:35,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 766 places, 2858 transitions, 108852 flow, removed 1451 selfloop flow, removed 8 redundant places. [2023-11-29 06:38:35,332 INFO L231 Difference]: Finished difference. Result has 776 places, 2756 transitions, 101753 flow [2023-11-29 06:38:35,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=96454, PETRI_DIFFERENCE_MINUEND_PLACES=740, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=101753, PETRI_PLACES=776, PETRI_TRANSITIONS=2756} [2023-11-29 06:38:35,334 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 750 predicate places. [2023-11-29 06:38:35,334 INFO L495 AbstractCegarLoop]: Abstraction has has 776 places, 2756 transitions, 101753 flow [2023-11-29 06:38:35,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.466666666666667) internal successors, (164), 30 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:35,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:38:35,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:38:35,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 06:38:35,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 06:38:35,535 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:38:35,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:38:35,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1766907223, now seen corresponding path program 32 times [2023-11-29 06:38:35,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:38:35,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882181038] [2023-11-29 06:38:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:38:35,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:38:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:38:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:38:36,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:38:36,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882181038] [2023-11-29 06:38:36,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882181038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:38:36,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777128012] [2023-11-29 06:38:36,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:38:36,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:38:36,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:38:36,201 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:38:36,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 06:38:36,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:38:36,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:38:36,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:38:36,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:38:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:38:36,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:38:36,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:38:36,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-29 06:38:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:38:36,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777128012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:38:36,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:38:36,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 28 [2023-11-29 06:38:36,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76782137] [2023-11-29 06:38:36,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:38:36,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 06:38:36,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:38:36,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 06:38:36,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:38:36,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:38:36,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 776 places, 2756 transitions, 101753 flow. Second operand has 29 states, 29 states have (on average 5.379310344827586) internal successors, (156), 29 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:36,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:38:36,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:38:36,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:38:58,869 INFO L124 PetriNetUnfolderBase]: 9564/16197 cut-off events. [2023-11-29 06:38:58,870 INFO L125 PetriNetUnfolderBase]: For 1628408/1628408 co-relation queries the response was YES. [2023-11-29 06:38:59,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271581 conditions, 16197 events. 9564/16197 cut-off events. For 1628408/1628408 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 118227 event pairs, 804 based on Foata normal form. 2/16199 useless extension candidates. Maximal degree in co-relation 271178. Up to 15137 conditions per place. [2023-11-29 06:38:59,526 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 2610 selfloop transitions, 291 changer transitions 2/2904 dead transitions. [2023-11-29 06:38:59,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 802 places, 2904 transitions, 113145 flow [2023-11-29 06:38:59,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 06:38:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 06:38:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 240 transitions. [2023-11-29 06:38:59,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2023-11-29 06:38:59,528 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 240 transitions. [2023-11-29 06:38:59,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 240 transitions. [2023-11-29 06:38:59,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:38:59,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 240 transitions. [2023-11-29 06:38:59,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 8.88888888888889) internal successors, (240), 27 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:59,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 25.0) internal successors, (700), 28 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:59,530 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 25.0) internal successors, (700), 28 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:38:59,530 INFO L175 Difference]: Start difference. First operand has 776 places, 2756 transitions, 101753 flow. Second operand 27 states and 240 transitions. [2023-11-29 06:38:59,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 802 places, 2904 transitions, 113145 flow [2023-11-29 06:39:28,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 786 places, 2904 transitions, 111927 flow, removed 500 selfloop flow, removed 16 redundant places. [2023-11-29 06:39:28,193 INFO L231 Difference]: Finished difference. Result has 794 places, 2818 transitions, 104799 flow [2023-11-29 06:39:28,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=100555, PETRI_DIFFERENCE_MINUEND_PLACES=760, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=104799, PETRI_PLACES=794, PETRI_TRANSITIONS=2818} [2023-11-29 06:39:28,195 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 768 predicate places. [2023-11-29 06:39:28,196 INFO L495 AbstractCegarLoop]: Abstraction has has 794 places, 2818 transitions, 104799 flow [2023-11-29 06:39:28,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.379310344827586) internal successors, (156), 29 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:39:28,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:39:28,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:39:28,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 06:39:28,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 06:39:28,397 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:39:28,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:39:28,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1062426979, now seen corresponding path program 33 times [2023-11-29 06:39:28,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:39:28,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225053529] [2023-11-29 06:39:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:39:28,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:39:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:39:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:39:28,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:39:28,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225053529] [2023-11-29 06:39:28,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225053529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:39:28,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136665469] [2023-11-29 06:39:28,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:39:28,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:39:28,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:39:28,811 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:39:28,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 06:39:28,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 06:39:28,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:39:28,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 06:39:28,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:39:29,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 06:39:29,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:39:29,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2023-11-29 06:39:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:39:29,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:39:34,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-29 06:39:34,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:39:34,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 56 [2023-11-29 06:39:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:39:35,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136665469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:39:35,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:39:35,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 17] total 41 [2023-11-29 06:39:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568661938] [2023-11-29 06:39:35,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:39:35,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 06:39:35,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:39:35,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 06:39:35,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1466, Unknown=1, NotChecked=0, Total=1722 [2023-11-29 06:39:35,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:39:35,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 794 places, 2818 transitions, 104799 flow. Second operand has 42 states, 42 states have (on average 4.809523809523809) internal successors, (202), 42 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:39:35,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:39:35,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:39:35,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:40:07,255 INFO L124 PetriNetUnfolderBase]: 10706/18183 cut-off events. [2023-11-29 06:40:07,255 INFO L125 PetriNetUnfolderBase]: For 1900241/1900241 co-relation queries the response was YES. [2023-11-29 06:40:07,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310538 conditions, 18183 events. 10706/18183 cut-off events. For 1900241/1900241 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 135771 event pairs, 587 based on Foata normal form. 2/18185 useless extension candidates. Maximal degree in co-relation 310126. Up to 11102 conditions per place. [2023-11-29 06:40:07,869 INFO L140 encePairwiseOnDemand]: 10/25 looper letters, 1163 selfloop transitions, 2266 changer transitions 9/3439 dead transitions. [2023-11-29 06:40:07,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 839 places, 3439 transitions, 135318 flow [2023-11-29 06:40:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 06:40:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 06:40:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 392 transitions. [2023-11-29 06:40:07,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3408695652173913 [2023-11-29 06:40:07,870 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 392 transitions. [2023-11-29 06:40:07,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 392 transitions. [2023-11-29 06:40:07,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:40:07,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 392 transitions. [2023-11-29 06:40:07,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 8.521739130434783) internal successors, (392), 46 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:40:07,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 25.0) internal successors, (1175), 47 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:40:07,874 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 25.0) internal successors, (1175), 47 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:40:07,874 INFO L175 Difference]: Start difference. First operand has 794 places, 2818 transitions, 104799 flow. Second operand 46 states and 392 transitions. [2023-11-29 06:40:07,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 839 places, 3439 transitions, 135318 flow [2023-11-29 06:40:44,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 822 places, 3439 transitions, 134316 flow, removed 415 selfloop flow, removed 17 redundant places. [2023-11-29 06:40:44,487 INFO L231 Difference]: Finished difference. Result has 836 places, 3296 transitions, 133959 flow [2023-11-29 06:40:44,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=103890, PETRI_DIFFERENCE_MINUEND_PLACES=777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1811, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=133959, PETRI_PLACES=836, PETRI_TRANSITIONS=3296} [2023-11-29 06:40:44,489 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 810 predicate places. [2023-11-29 06:40:44,489 INFO L495 AbstractCegarLoop]: Abstraction has has 836 places, 3296 transitions, 133959 flow [2023-11-29 06:40:44,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.809523809523809) internal successors, (202), 42 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:40:44,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:40:44,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:40:44,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 06:40:44,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 06:40:44,690 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:40:44,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:40:44,690 INFO L85 PathProgramCache]: Analyzing trace with hash 604645259, now seen corresponding path program 34 times [2023-11-29 06:40:44,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:40:44,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510038326] [2023-11-29 06:40:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:40:44,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:40:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:40:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:40:45,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:40:45,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510038326] [2023-11-29 06:40:45,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510038326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:40:45,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398021186] [2023-11-29 06:40:45,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:40:45,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:40:45,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:40:45,277 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:40:45,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 06:40:45,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:40:45,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:40:45,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:40:45,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:40:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:40:45,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:40:45,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:40:45,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-29 06:40:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:40:45,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398021186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:40:45,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:40:45,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 30 [2023-11-29 06:40:45,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141339572] [2023-11-29 06:40:45,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:40:45,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 06:40:45,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:40:45,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 06:40:45,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2023-11-29 06:40:46,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:40:46,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 836 places, 3296 transitions, 133959 flow. Second operand has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 31 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:40:46,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:40:46,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:40:46,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:41:21,153 INFO L124 PetriNetUnfolderBase]: 10864/18444 cut-off events. [2023-11-29 06:41:21,153 INFO L125 PetriNetUnfolderBase]: For 2132172/2132172 co-relation queries the response was YES. [2023-11-29 06:41:21,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333559 conditions, 18444 events. 10864/18444 cut-off events. For 2132172/2132172 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 138064 event pairs, 788 based on Foata normal form. 1/18445 useless extension candidates. Maximal degree in co-relation 333133. Up to 17635 conditions per place. [2023-11-29 06:41:21,720 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 3201 selfloop transitions, 203 changer transitions 1/3406 dead transitions. [2023-11-29 06:41:21,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 856 places, 3406 transitions, 145469 flow [2023-11-29 06:41:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:41:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 06:41:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 181 transitions. [2023-11-29 06:41:21,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3290909090909091 [2023-11-29 06:41:21,722 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 181 transitions. [2023-11-29 06:41:21,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 181 transitions. [2023-11-29 06:41:21,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:41:21,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 181 transitions. [2023-11-29 06:41:21,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 8.227272727272727) internal successors, (181), 22 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:41:21,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 25.0) internal successors, (575), 23 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:41:21,723 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 25.0) internal successors, (575), 23 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:41:21,723 INFO L175 Difference]: Start difference. First operand has 836 places, 3296 transitions, 133959 flow. Second operand 22 states and 181 transitions. [2023-11-29 06:41:21,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 856 places, 3406 transitions, 145469 flow [2023-11-29 06:42:09,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 3406 transitions, 144001 flow, removed 620 selfloop flow, removed 18 redundant places. [2023-11-29 06:42:09,268 INFO L231 Difference]: Finished difference. Result has 844 places, 3336 transitions, 135557 flow [2023-11-29 06:42:09,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=132621, PETRI_DIFFERENCE_MINUEND_PLACES=817, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=135557, PETRI_PLACES=844, PETRI_TRANSITIONS=3336} [2023-11-29 06:42:09,271 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 818 predicate places. [2023-11-29 06:42:09,271 INFO L495 AbstractCegarLoop]: Abstraction has has 844 places, 3336 transitions, 135557 flow [2023-11-29 06:42:09,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 31 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:09,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:42:09,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:42:09,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 06:42:09,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 06:42:09,472 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:42:09,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:42:09,473 INFO L85 PathProgramCache]: Analyzing trace with hash -742920919, now seen corresponding path program 35 times [2023-11-29 06:42:09,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:42:09,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059105990] [2023-11-29 06:42:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:42:09,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:42:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:42:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:10,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:42:10,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059105990] [2023-11-29 06:42:10,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059105990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:42:10,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858891848] [2023-11-29 06:42:10,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 06:42:10,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:42:10,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:42:10,135 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:42:10,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 06:42:10,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 06:42:10,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:42:10,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 06:42:10,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:42:10,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:42:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:42:10,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:42:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:42:10,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858891848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:42:10,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:42:10,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 33 [2023-11-29 06:42:10,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102836333] [2023-11-29 06:42:10,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:42:10,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 06:42:10,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:42:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 06:42:10,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 06:42:10,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:42:10,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 3336 transitions, 135557 flow. Second operand has 34 states, 34 states have (on average 5.029411764705882) internal successors, (171), 34 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:10,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:42:10,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:42:10,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:42:49,512 INFO L124 PetriNetUnfolderBase]: 11360/19262 cut-off events. [2023-11-29 06:42:49,512 INFO L125 PetriNetUnfolderBase]: For 2144120/2144120 co-relation queries the response was YES. [2023-11-29 06:42:50,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347754 conditions, 19262 events. 11360/19262 cut-off events. For 2144120/2144120 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 144741 event pairs, 781 based on Foata normal form. 2/19264 useless extension candidates. Maximal degree in co-relation 347321. Up to 14078 conditions per place. [2023-11-29 06:42:50,331 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 1971 selfloop transitions, 1653 changer transitions 2/3627 dead transitions. [2023-11-29 06:42:50,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 871 places, 3627 transitions, 156071 flow [2023-11-29 06:42:50,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:42:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 06:42:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 261 transitions. [2023-11-29 06:42:50,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37285714285714283 [2023-11-29 06:42:50,332 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 261 transitions. [2023-11-29 06:42:50,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 261 transitions. [2023-11-29 06:42:50,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:42:50,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 261 transitions. [2023-11-29 06:42:50,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 9.321428571428571) internal successors, (261), 28 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:50,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 25.0) internal successors, (725), 29 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:50,335 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 25.0) internal successors, (725), 29 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:42:50,335 INFO L175 Difference]: Start difference. First operand has 844 places, 3336 transitions, 135557 flow. Second operand 28 states and 261 transitions. [2023-11-29 06:42:50,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 871 places, 3627 transitions, 156071 flow [2023-11-29 06:43:35,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 862 places, 3627 transitions, 155349 flow, removed 269 selfloop flow, removed 9 redundant places. [2023-11-29 06:43:35,826 INFO L231 Difference]: Finished difference. Result has 876 places, 3490 transitions, 149884 flow [2023-11-29 06:43:35,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=134849, PETRI_DIFFERENCE_MINUEND_PLACES=835, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1774, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=149884, PETRI_PLACES=876, PETRI_TRANSITIONS=3490} [2023-11-29 06:43:35,829 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 850 predicate places. [2023-11-29 06:43:35,829 INFO L495 AbstractCegarLoop]: Abstraction has has 876 places, 3490 transitions, 149884 flow [2023-11-29 06:43:35,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.029411764705882) internal successors, (171), 34 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:35,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:43:35,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:43:35,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-29 06:43:36,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 06:43:36,030 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:43:36,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:43:36,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1432178221, now seen corresponding path program 36 times [2023-11-29 06:43:36,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:43:36,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347472235] [2023-11-29 06:43:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:43:36,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:43:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:43:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:43:36,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:43:36,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347472235] [2023-11-29 06:43:36,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347472235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:43:36,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093681165] [2023-11-29 06:43:36,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 06:43:36,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:43:36,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:43:36,526 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:43:36,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 06:43:36,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 06:43:36,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:43:36,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:43:36,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:43:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:43:36,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:43:37,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:43:37,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-29 06:43:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:43:37,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093681165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:43:37,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:43:37,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 31 [2023-11-29 06:43:37,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599632109] [2023-11-29 06:43:37,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:43:37,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:43:37,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:43:37,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:43:37,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:43:37,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:43:37,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 876 places, 3490 transitions, 149884 flow. Second operand has 32 states, 32 states have (on average 5.3125) internal successors, (170), 32 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:43:37,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:43:37,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:43:37,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:44:18,523 INFO L124 PetriNetUnfolderBase]: 11751/19913 cut-off events. [2023-11-29 06:44:18,523 INFO L125 PetriNetUnfolderBase]: For 2426419/2426419 co-relation queries the response was YES. [2023-11-29 06:44:19,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374403 conditions, 19913 events. 11751/19913 cut-off events. For 2426419/2426419 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 149866 event pairs, 826 based on Foata normal form. 2/19915 useless extension candidates. Maximal degree in co-relation 373956. Up to 18533 conditions per place. [2023-11-29 06:44:19,575 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 3339 selfloop transitions, 367 changer transitions 2/3709 dead transitions. [2023-11-29 06:44:19,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 905 places, 3709 transitions, 166991 flow [2023-11-29 06:44:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 06:44:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 06:44:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 271 transitions. [2023-11-29 06:44:19,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36133333333333334 [2023-11-29 06:44:19,576 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 271 transitions. [2023-11-29 06:44:19,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 271 transitions. [2023-11-29 06:44:19,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:44:19,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 271 transitions. [2023-11-29 06:44:19,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 9.033333333333333) internal successors, (271), 30 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:19,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 25.0) internal successors, (775), 31 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:19,579 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 25.0) internal successors, (775), 31 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:44:19,579 INFO L175 Difference]: Start difference. First operand has 876 places, 3490 transitions, 149884 flow. Second operand 30 states and 271 transitions. [2023-11-29 06:44:19,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 905 places, 3709 transitions, 166991 flow [2023-11-29 06:45:12,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 893 places, 3709 transitions, 164720 flow, removed 986 selfloop flow, removed 12 redundant places. [2023-11-29 06:45:12,201 INFO L231 Difference]: Finished difference. Result has 905 places, 3603 transitions, 154995 flow [2023-11-29 06:45:12,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=147647, PETRI_DIFFERENCE_MINUEND_PLACES=864, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=154995, PETRI_PLACES=905, PETRI_TRANSITIONS=3603} [2023-11-29 06:45:12,204 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 879 predicate places. [2023-11-29 06:45:12,205 INFO L495 AbstractCegarLoop]: Abstraction has has 905 places, 3603 transitions, 154995 flow [2023-11-29 06:45:12,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.3125) internal successors, (170), 32 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:12,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:45:12,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:12,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 06:45:12,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-29 06:45:12,406 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 06:45:12,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:12,406 INFO L85 PathProgramCache]: Analyzing trace with hash 349685327, now seen corresponding path program 37 times [2023-11-29 06:45:12,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:45:12,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618360569] [2023-11-29 06:45:12,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:12,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:45:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:45:13,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:13,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618360569] [2023-11-29 06:45:13,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618360569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:45:13,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701167585] [2023-11-29 06:45:13,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 06:45:13,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:13,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:45:13,081 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:45:13,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8efa27b-78b1-41cd-954b-bf5689991b14/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 06:45:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:13,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:45:13,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:13,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:45:13,654 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:45:13,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2023-11-29 06:45:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:45:13,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701167585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:45:13,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:45:13,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 31 [2023-11-29 06:45:13,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897820196] [2023-11-29 06:45:13,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:45:13,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:45:13,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:13,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:45:13,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:45:13,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2023-11-29 06:45:13,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 905 places, 3603 transitions, 154995 flow. Second operand has 32 states, 32 states have (on average 5.125) internal successors, (164), 32 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:45:13,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:45:13,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2023-11-29 06:45:13,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:46:00,526 INFO L124 PetriNetUnfolderBase]: 11925/20214 cut-off events. [2023-11-29 06:46:00,526 INFO L125 PetriNetUnfolderBase]: For 2536153/2536153 co-relation queries the response was YES. [2023-11-29 06:46:01,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383366 conditions, 20214 events. 11925/20214 cut-off events. For 2536153/2536153 co-relation queries the response was YES. Maximal size of possible extension queue 959. Compared 152577 event pairs, 873 based on Foata normal form. 1/20215 useless extension candidates. Maximal degree in co-relation 382906. Up to 14736 conditions per place. [2023-11-29 06:46:01,350 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 1989 selfloop transitions, 1756 changer transitions 1/3747 dead transitions. [2023-11-29 06:46:01,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 930 places, 3747 transitions, 168620 flow [2023-11-29 06:46:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 06:46:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 06:46:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 238 transitions. [2023-11-29 06:46:01,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36615384615384616 [2023-11-29 06:46:01,352 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 238 transitions. [2023-11-29 06:46:01,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 238 transitions. [2023-11-29 06:46:01,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:46:01,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 238 transitions. [2023-11-29 06:46:01,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 9.153846153846153) internal successors, (238), 26 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:01,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 25.0) internal successors, (675), 27 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:01,354 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 25.0) internal successors, (675), 27 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:46:01,354 INFO L175 Difference]: Start difference. First operand has 905 places, 3603 transitions, 154995 flow. Second operand 26 states and 238 transitions. [2023-11-29 06:46:01,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 930 places, 3747 transitions, 168620 flow