./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/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_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/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_1d3d27fb-735b-45e0-a78a-a47e2cef100c/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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:39:46,998 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:39:47,062 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:39:47,066 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:39:47,067 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:39:47,089 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:39:47,090 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:39:47,091 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:39:47,091 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:39:47,092 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:39:47,092 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:39:47,093 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:39:47,094 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:39:47,094 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:39:47,095 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:39:47,095 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:39:47,096 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:39:47,096 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:39:47,097 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:39:47,097 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:39:47,097 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:39:47,101 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:39:47,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:39:47,101 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:39:47,102 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:39:47,102 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:39:47,102 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:39:47,103 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:39:47,103 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:39:47,104 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:39:47,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:39:47,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:39:47,105 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:39:47,105 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:39:47,105 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:39:47,105 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:39:47,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:39:47,106 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:39:47,106 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:39:47,106 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:39:47,106 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:39:47,106 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:39:47,107 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_1d3d27fb-735b-45e0-a78a-a47e2cef100c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2023-11-29 00:39:47,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:39:47,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:39:47,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:39:47,347 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:39:47,348 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:39:47,349 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-29 00:39:50,082 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:39:50,258 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:39:50,259 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-29 00:39:50,267 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/data/f6575c5d8/91f437804a0649c6b002b79fb5d8b13a/FLAG22cd4e8c3 [2023-11-29 00:39:50,281 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/data/f6575c5d8/91f437804a0649c6b002b79fb5d8b13a [2023-11-29 00:39:50,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:39:50,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:39:50,286 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:39:50,286 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:39:50,291 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:39:50,291 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,292 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733a2b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50, skipping insertion in model container [2023-11-29 00:39:50,293 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,318 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:39:50,483 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_1d3d27fb-735b-45e0-a78a-a47e2cef100c/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2023-11-29 00:39:50,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:39:50,503 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:39:50,526 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_1d3d27fb-735b-45e0-a78a-a47e2cef100c/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2023-11-29 00:39:50,530 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:39:50,539 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:39:50,539 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:39:50,547 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:39:50,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50 WrapperNode [2023-11-29 00:39:50,548 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:39:50,549 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:39:50,549 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:39:50,549 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:39:50,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,565 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,592 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 149 [2023-11-29 00:39:50,592 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:39:50,593 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:39:50,593 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:39:50,593 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:39:50,605 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,608 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,625 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 4, 2, 2]. 40 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 00:39:50,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,626 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,633 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,639 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,641 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,644 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:39:50,645 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:39:50,645 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:39:50,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:39:50,646 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (1/1) ... [2023-11-29 00:39:50,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:39:50,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:39:50,676 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:39:50,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:39:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:39:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:39:50,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:39:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:39:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:39:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:39:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:39:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:39:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:39:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:39:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:39:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:39:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:39:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:39:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 00:39:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 00:39:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:39:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:39:50,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:39:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:39:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:39:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:39:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:39:50,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:39:50,719 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 00:39:50,823 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:39:50,824 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:39:51,056 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:39:51,280 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:39:51,280 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 00:39:51,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:39:51 BoogieIcfgContainer [2023-11-29 00:39:51,281 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:39:51,283 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:39:51,284 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:39:51,286 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:39:51,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:39:50" (1/3) ... [2023-11-29 00:39:51,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30244306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:39:51, skipping insertion in model container [2023-11-29 00:39:51,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:39:50" (2/3) ... [2023-11-29 00:39:51,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30244306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:39:51, skipping insertion in model container [2023-11-29 00:39:51,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:39:51" (3/3) ... [2023-11-29 00:39:51,289 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-11-29 00:39:51,297 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:39:51,305 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:39:51,305 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:39:51,306 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:39:51,348 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:39:51,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 80 flow [2023-11-29 00:39:51,404 INFO L124 PetriNetUnfolderBase]: 6/31 cut-off events. [2023-11-29 00:39:51,405 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:39:51,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 6/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2023-11-29 00:39:51,408 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 33 transitions, 80 flow [2023-11-29 00:39:51,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 30 transitions, 72 flow [2023-11-29 00:39:51,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:39:51,429 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;@60f5cf7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:39:51,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 00:39:51,441 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:39:51,441 INFO L124 PetriNetUnfolderBase]: 6/29 cut-off events. [2023-11-29 00:39:51,441 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:39:51,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:51,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:51,443 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 00:39:51,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1663499182, now seen corresponding path program 1 times [2023-11-29 00:39:51,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:51,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045729913] [2023-11-29 00:39:51,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:51,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:51,632 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 00:39:51,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:51,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045729913] [2023-11-29 00:39:51,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045729913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:51,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:51,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:39:51,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894372990] [2023-11-29 00:39:51,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:51,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:39:51,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:51,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:39:51,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:39:51,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:39:51,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 72 flow. Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:51,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:51,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:39:51,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:51,764 INFO L124 PetriNetUnfolderBase]: 129/237 cut-off events. [2023-11-29 00:39:51,765 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 00:39:51,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 237 events. 129/237 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 975 event pairs, 86 based on Foata normal form. 38/217 useless extension candidates. Maximal degree in co-relation 397. Up to 212 conditions per place. [2023-11-29 00:39:51,770 INFO L140 encePairwiseOnDemand]: 31/33 looper letters, 21 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2023-11-29 00:39:51,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 110 flow [2023-11-29 00:39:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:39:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-29 00:39:51,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 41 transitions. [2023-11-29 00:39:51,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2023-11-29 00:39:51,781 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 41 transitions. [2023-11-29 00:39:51,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 41 transitions. [2023-11-29 00:39:51,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:51,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 41 transitions. [2023-11-29 00:39:51,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:51,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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 00:39:51,788 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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 00:39:51,790 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 2 states and 41 transitions. [2023-11-29 00:39:51,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 110 flow [2023-11-29 00:39:51,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:39:51,795 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 60 flow [2023-11-29 00:39:51,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2023-11-29 00:39:51,800 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-11-29 00:39:51,800 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 60 flow [2023-11-29 00:39:51,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:51,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:51,800 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 00:39:51,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:39:51,801 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 00:39:51,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash -468229857, now seen corresponding path program 1 times [2023-11-29 00:39:51,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:51,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806500232] [2023-11-29 00:39:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:51,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:51,974 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 00:39:51,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:51,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806500232] [2023-11-29 00:39:51,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806500232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:51,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:51,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:39:51,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539202768] [2023-11-29 00:39:51,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:51,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:39:51,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:51,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:39:51,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:39:51,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:39:51,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:51,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:51,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:39:51,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:52,098 INFO L124 PetriNetUnfolderBase]: 189/356 cut-off events. [2023-11-29 00:39:52,098 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 00:39:52,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 356 events. 189/356 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1645 event pairs, 69 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 692. Up to 177 conditions per place. [2023-11-29 00:39:52,102 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 31 selfloop transitions, 2 changer transitions 4/44 dead transitions. [2023-11-29 00:39:52,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 169 flow [2023-11-29 00:39:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:39:52,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:39:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-29 00:39:52,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2023-11-29 00:39:52,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-29 00:39:52,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-29 00:39:52,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:52,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-29 00:39:52,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,107 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 60 flow. Second operand 3 states and 65 transitions. [2023-11-29 00:39:52,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 169 flow [2023-11-29 00:39:52,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 44 transitions, 169 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:39:52,109 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 72 flow [2023-11-29 00:39:52,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-11-29 00:39:52,110 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-11-29 00:39:52,111 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 72 flow [2023-11-29 00:39:52,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:52,111 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:52,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:39:52,112 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 00:39:52,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash 688354536, now seen corresponding path program 1 times [2023-11-29 00:39:52,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:52,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007556566] [2023-11-29 00:39:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:52,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:52,220 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 00:39:52,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:52,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007556566] [2023-11-29 00:39:52,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007556566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:52,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:52,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:39:52,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387986882] [2023-11-29 00:39:52,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:52,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:39:52,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:52,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:39:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:39:52,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:39:52,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:52,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:39:52,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:52,322 INFO L124 PetriNetUnfolderBase]: 210/412 cut-off events. [2023-11-29 00:39:52,322 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-29 00:39:52,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 412 events. 210/412 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1895 event pairs, 87 based on Foata normal form. 12/337 useless extension candidates. Maximal degree in co-relation 797. Up to 236 conditions per place. [2023-11-29 00:39:52,326 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 24 selfloop transitions, 3 changer transitions 7/41 dead transitions. [2023-11-29 00:39:52,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 166 flow [2023-11-29 00:39:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:39:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:39:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-29 00:39:52,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6161616161616161 [2023-11-29 00:39:52,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-29 00:39:52,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-29 00:39:52,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:52,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-29 00:39:52,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,330 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 72 flow. Second operand 3 states and 61 transitions. [2023-11-29 00:39:52,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 166 flow [2023-11-29 00:39:52,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:39:52,332 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2023-11-29 00:39:52,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-29 00:39:52,333 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-11-29 00:39:52,333 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2023-11-29 00:39:52,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:52,334 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:52,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:39:52,334 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 00:39:52,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2027600440, now seen corresponding path program 1 times [2023-11-29 00:39:52,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:52,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621414884] [2023-11-29 00:39:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:52,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:52,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:52,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621414884] [2023-11-29 00:39:52,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621414884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:52,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:52,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:39:52,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962910975] [2023-11-29 00:39:52,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:52,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:39:52,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:52,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:39:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:39:52,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:39:52,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:52,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:39:52,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:52,648 INFO L124 PetriNetUnfolderBase]: 255/487 cut-off events. [2023-11-29 00:39:52,649 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-11-29 00:39:52,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 487 events. 255/487 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2401 event pairs, 196 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 1054. Up to 355 conditions per place. [2023-11-29 00:39:52,652 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 23 selfloop transitions, 2 changer transitions 14/46 dead transitions. [2023-11-29 00:39:52,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 46 transitions, 201 flow [2023-11-29 00:39:52,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:39:52,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:39:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2023-11-29 00:39:52,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2023-11-29 00:39:52,654 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 73 transitions. [2023-11-29 00:39:52,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 73 transitions. [2023-11-29 00:39:52,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:52,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 73 transitions. [2023-11-29 00:39:52,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 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 00:39:52,657 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 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 00:39:52,657 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 4 states and 73 transitions. [2023-11-29 00:39:52,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 46 transitions, 201 flow [2023-11-29 00:39:52,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:39:52,659 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 100 flow [2023-11-29 00:39:52,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-29 00:39:52,660 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-11-29 00:39:52,661 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 100 flow [2023-11-29 00:39:52,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:52,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:52,661 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:52,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:39:52,662 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 00:39:52,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:52,662 INFO L85 PathProgramCache]: Analyzing trace with hash 262947762, now seen corresponding path program 1 times [2023-11-29 00:39:52,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:52,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895902194] [2023-11-29 00:39:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:52,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:53,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:53,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895902194] [2023-11-29 00:39:53,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895902194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:39:53,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112139629] [2023-11-29 00:39:53,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:53,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:39:53,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:39:53,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:39:53,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:39:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:53,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:39:53,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:53,786 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 00:39:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:54,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:39:54,624 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 61 treesize of output 55 [2023-11-29 00:39:54,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:39:54,642 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 68 [2023-11-29 00:39:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:54,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112139629] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:39:54,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:39:54,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-29 00:39:54,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571600614] [2023-11-29 00:39:54,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:39:54,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:39:54,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:54,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:39:54,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:39:54,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:39:54,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 100 flow. Second operand has 19 states, 19 states have (on average 11.842105263157896) internal successors, (225), 19 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:54,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:54,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:39:54,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:56,023 INFO L124 PetriNetUnfolderBase]: 969/1996 cut-off events. [2023-11-29 00:39:56,023 INFO L125 PetriNetUnfolderBase]: For 556/556 co-relation queries the response was YES. [2023-11-29 00:39:56,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4205 conditions, 1996 events. 969/1996 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13569 event pairs, 216 based on Foata normal form. 3/1743 useless extension candidates. Maximal degree in co-relation 4197. Up to 375 conditions per place. [2023-11-29 00:39:56,058 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 99 selfloop transitions, 33 changer transitions 61/200 dead transitions. [2023-11-29 00:39:56,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 200 transitions, 957 flow [2023-11-29 00:39:56,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:39:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 00:39:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 353 transitions. [2023-11-29 00:39:56,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942760942760943 [2023-11-29 00:39:56,062 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 353 transitions. [2023-11-29 00:39:56,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 353 transitions. [2023-11-29 00:39:56,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:56,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 353 transitions. [2023-11-29 00:39:56,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 19.61111111111111) internal successors, (353), 18 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:56,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:56,068 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:56,068 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 100 flow. Second operand 18 states and 353 transitions. [2023-11-29 00:39:56,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 200 transitions, 957 flow [2023-11-29 00:39:56,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 200 transitions, 931 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-29 00:39:56,076 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 366 flow [2023-11-29 00:39:56,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=366, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2023-11-29 00:39:56,077 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 29 predicate places. [2023-11-29 00:39:56,077 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 366 flow [2023-11-29 00:39:56,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.842105263157896) internal successors, (225), 19 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:56,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:56,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:56,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:39:56,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:39:56,284 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 00:39:56,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1506991202, now seen corresponding path program 1 times [2023-11-29 00:39:56,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:56,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593047182] [2023-11-29 00:39:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:56,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:39:56,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:56,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593047182] [2023-11-29 00:39:56,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593047182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:39:56,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:39:56,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:39:56,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053461864] [2023-11-29 00:39:56,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:39:56,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:39:56,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:56,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:39:56,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:39:56,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2023-11-29 00:39:56,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:56,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:56,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2023-11-29 00:39:56,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:56,720 INFO L124 PetriNetUnfolderBase]: 1213/2255 cut-off events. [2023-11-29 00:39:56,720 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-11-29 00:39:56,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5947 conditions, 2255 events. 1213/2255 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14458 event pairs, 644 based on Foata normal form. 40/2077 useless extension candidates. Maximal degree in co-relation 5931. Up to 1586 conditions per place. [2023-11-29 00:39:56,734 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 63 selfloop transitions, 2 changer transitions 3/73 dead transitions. [2023-11-29 00:39:56,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 73 transitions, 524 flow [2023-11-29 00:39:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:39:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:39:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2023-11-29 00:39:56,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2023-11-29 00:39:56,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 58 transitions. [2023-11-29 00:39:56,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 58 transitions. [2023-11-29 00:39:56,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:56,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 58 transitions. [2023-11-29 00:39:56,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:56,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:56,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:56,737 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 366 flow. Second operand 3 states and 58 transitions. [2023-11-29 00:39:56,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 73 transitions, 524 flow [2023-11-29 00:39:56,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 477 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-11-29 00:39:56,759 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 270 flow [2023-11-29 00:39:56,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2023-11-29 00:39:56,760 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 29 predicate places. [2023-11-29 00:39:56,760 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 270 flow [2023-11-29 00:39:56,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:56,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:56,761 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:56,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:39:56,761 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 00:39:56,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:56,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1531383836, now seen corresponding path program 2 times [2023-11-29 00:39:56,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:56,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318793180] [2023-11-29 00:39:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:56,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:39:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:39:58,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:39:58,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318793180] [2023-11-29 00:39:58,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318793180] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:39:58,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516044850] [2023-11-29 00:39:58,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:39:58,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:39:58,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:39:58,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:39:58,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:39:58,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:39:58,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:39:58,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 00:39:58,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:39:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:39:58,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:39:58,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:39:58,864 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 40 treesize of output 24 [2023-11-29 00:39:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 00:39:58,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516044850] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:39:58,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:39:58,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 17 [2023-11-29 00:39:58,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050228613] [2023-11-29 00:39:58,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:39:58,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:39:58,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:39:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:39:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:39:58,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:39:58,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 270 flow. Second operand has 18 states, 18 states have (on average 12.166666666666666) internal successors, (219), 18 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:58,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:39:58,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:39:58,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:39:59,611 INFO L124 PetriNetUnfolderBase]: 1012/2030 cut-off events. [2023-11-29 00:39:59,611 INFO L125 PetriNetUnfolderBase]: For 2595/2601 co-relation queries the response was YES. [2023-11-29 00:39:59,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5391 conditions, 2030 events. 1012/2030 cut-off events. For 2595/2601 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13639 event pairs, 244 based on Foata normal form. 5/1837 useless extension candidates. Maximal degree in co-relation 5375. Up to 472 conditions per place. [2023-11-29 00:39:59,624 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 51 selfloop transitions, 22 changer transitions 12/93 dead transitions. [2023-11-29 00:39:59,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 93 transitions, 574 flow [2023-11-29 00:39:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:39:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:39:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2023-11-29 00:39:59,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47878787878787876 [2023-11-29 00:39:59,626 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 158 transitions. [2023-11-29 00:39:59,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 158 transitions. [2023-11-29 00:39:59,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:39:59,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 158 transitions. [2023-11-29 00:39:59,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:59,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:59,629 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:59,629 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 270 flow. Second operand 10 states and 158 transitions. [2023-11-29 00:39:59,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 93 transitions, 574 flow [2023-11-29 00:39:59,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 93 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:39:59,638 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 345 flow [2023-11-29 00:39:59,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=345, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2023-11-29 00:39:59,639 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 39 predicate places. [2023-11-29 00:39:59,639 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 345 flow [2023-11-29 00:39:59,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.166666666666666) internal successors, (219), 18 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:39:59,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:39:59,640 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:39:59,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:39:59,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:39:59,840 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 00:39:59,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:39:59,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1975532153, now seen corresponding path program 3 times [2023-11-29 00:39:59,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:39:59,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509177078] [2023-11-29 00:39:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:39:59,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:39:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:00,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:00,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509177078] [2023-11-29 00:40:00,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509177078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:40:00,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907612798] [2023-11-29 00:40:00,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:40:00,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:00,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:00,041 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:00,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:40:00,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:40:00,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:40:00,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:40:00,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:40:00,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:40:00,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907612798] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:00,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:40:00,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-11-29 00:40:00,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807744650] [2023-11-29 00:40:00,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:00,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:40:00,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:00,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:40:00,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:40:00,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:40:00,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 345 flow. Second operand has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 14 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 00:40:00,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:00,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:40:00,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:00,743 INFO L124 PetriNetUnfolderBase]: 836/1744 cut-off events. [2023-11-29 00:40:00,743 INFO L125 PetriNetUnfolderBase]: For 2712/2712 co-relation queries the response was YES. [2023-11-29 00:40:00,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4608 conditions, 1744 events. 836/1744 cut-off events. For 2712/2712 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11903 event pairs, 336 based on Foata normal form. 38/1619 useless extension candidates. Maximal degree in co-relation 4590. Up to 637 conditions per place. [2023-11-29 00:40:00,753 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 35 selfloop transitions, 6 changer transitions 59/108 dead transitions. [2023-11-29 00:40:00,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 108 transitions, 652 flow [2023-11-29 00:40:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 00:40:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 00:40:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2023-11-29 00:40:00,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2023-11-29 00:40:00,755 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 177 transitions. [2023-11-29 00:40:00,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 177 transitions. [2023-11-29 00:40:00,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:00,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 177 transitions. [2023-11-29 00:40:00,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:00,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:00,757 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 33.0) internal successors, (363), 11 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:00,758 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 345 flow. Second operand 10 states and 177 transitions. [2023-11-29 00:40:00,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 108 transitions, 652 flow [2023-11-29 00:40:00,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 600 flow, removed 15 selfloop flow, removed 8 redundant places. [2023-11-29 00:40:00,790 INFO L231 Difference]: Finished difference. Result has 73 places, 46 transitions, 228 flow [2023-11-29 00:40:00,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=228, PETRI_PLACES=73, PETRI_TRANSITIONS=46} [2023-11-29 00:40:00,791 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2023-11-29 00:40:00,791 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 46 transitions, 228 flow [2023-11-29 00:40:00,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 14 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 00:40:00,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:00,792 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:00,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:40:00,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 00:40:00,997 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 00:40:00,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:00,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1062931465, now seen corresponding path program 4 times [2023-11-29 00:40:00,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:00,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946755667] [2023-11-29 00:40:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:00,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:40:01,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:01,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946755667] [2023-11-29 00:40:01,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946755667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:40:01,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198322804] [2023-11-29 00:40:01,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:40:01,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:01,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:01,072 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:01,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:40:01,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:40:01,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:40:01,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:40:01,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:40:01,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:40:01,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198322804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:01,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:40:01,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-29 00:40:01,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951859488] [2023-11-29 00:40:01,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:01,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:40:01,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:01,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:40:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:40:01,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:40:01,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 46 transitions, 228 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:01,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:01,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:40:01,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:01,663 INFO L124 PetriNetUnfolderBase]: 1037/2136 cut-off events. [2023-11-29 00:40:01,663 INFO L125 PetriNetUnfolderBase]: For 4100/4100 co-relation queries the response was YES. [2023-11-29 00:40:01,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5932 conditions, 2136 events. 1037/2136 cut-off events. For 4100/4100 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13844 event pairs, 381 based on Foata normal form. 24/1964 useless extension candidates. Maximal degree in co-relation 5913. Up to 637 conditions per place. [2023-11-29 00:40:01,676 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 56 selfloop transitions, 13 changer transitions 0/77 dead transitions. [2023-11-29 00:40:01,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 521 flow [2023-11-29 00:40:01,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:40:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:40:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2023-11-29 00:40:01,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439393939393939 [2023-11-29 00:40:01,678 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 85 transitions. [2023-11-29 00:40:01,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 85 transitions. [2023-11-29 00:40:01,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:01,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 85 transitions. [2023-11-29 00:40:01,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:01,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 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 00:40:01,680 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 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 00:40:01,680 INFO L175 Difference]: Start difference. First operand has 73 places, 46 transitions, 228 flow. Second operand 4 states and 85 transitions. [2023-11-29 00:40:01,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 521 flow [2023-11-29 00:40:01,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 467 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-11-29 00:40:01,687 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 330 flow [2023-11-29 00:40:01,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-11-29 00:40:01,688 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 26 predicate places. [2023-11-29 00:40:01,688 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 330 flow [2023-11-29 00:40:01,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:01,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:01,689 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:01,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:40:01,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:01,890 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 00:40:01,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:01,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2011092093, now seen corresponding path program 5 times [2023-11-29 00:40:01,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:01,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650326949] [2023-11-29 00:40:01,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:01,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:40:02,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:02,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650326949] [2023-11-29 00:40:02,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650326949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:40:02,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:40:02,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:40:02,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644214597] [2023-11-29 00:40:02,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:40:02,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:40:02,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:02,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:40:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:40:02,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2023-11-29 00:40:02,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:02,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:02,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2023-11-29 00:40:02,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:02,565 INFO L124 PetriNetUnfolderBase]: 1871/3559 cut-off events. [2023-11-29 00:40:02,565 INFO L125 PetriNetUnfolderBase]: For 3976/3976 co-relation queries the response was YES. [2023-11-29 00:40:02,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9369 conditions, 3559 events. 1871/3559 cut-off events. For 3976/3976 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 22630 event pairs, 325 based on Foata normal form. 200/3470 useless extension candidates. Maximal degree in co-relation 9354. Up to 1683 conditions per place. [2023-11-29 00:40:02,585 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 71 selfloop transitions, 4 changer transitions 4/83 dead transitions. [2023-11-29 00:40:02,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 661 flow [2023-11-29 00:40:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:40:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:40:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2023-11-29 00:40:02,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2023-11-29 00:40:02,587 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 69 transitions. [2023-11-29 00:40:02,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 69 transitions. [2023-11-29 00:40:02,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:02,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 69 transitions. [2023-11-29 00:40:02,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:02,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 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 00:40:02,588 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 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 00:40:02,588 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 330 flow. Second operand 4 states and 69 transitions. [2023-11-29 00:40:02,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 661 flow [2023-11-29 00:40:02,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 649 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-29 00:40:02,594 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 345 flow [2023-11-29 00:40:02,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=345, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-11-29 00:40:02,595 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2023-11-29 00:40:02,595 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 345 flow [2023-11-29 00:40:02,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:02,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:02,596 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:02,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 00:40:02,596 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 00:40:02,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:02,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1325344437, now seen corresponding path program 1 times [2023-11-29 00:40:02,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:02,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981235986] [2023-11-29 00:40:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:02,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:03,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:03,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981235986] [2023-11-29 00:40:03,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981235986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:40:03,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857473565] [2023-11-29 00:40:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:03,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:03,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:03,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:03,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:40:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:03,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 00:40:03,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:04,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:04,512 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-29 00:40:04,512 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 75 treesize of output 50 [2023-11-29 00:40:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:04,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857473565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:04,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:40:04,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-11-29 00:40:04,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636923095] [2023-11-29 00:40:04,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:04,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 00:40:04,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:04,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 00:40:04,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:40:04,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:40:04,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 345 flow. Second operand has 30 states, 30 states have (on average 11.233333333333333) internal successors, (337), 30 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:04,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:04,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:40:04,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:08,203 INFO L124 PetriNetUnfolderBase]: 4215/9041 cut-off events. [2023-11-29 00:40:08,203 INFO L125 PetriNetUnfolderBase]: For 12974/12978 co-relation queries the response was YES. [2023-11-29 00:40:08,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24419 conditions, 9041 events. 4215/9041 cut-off events. For 12974/12978 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 73241 event pairs, 585 based on Foata normal form. 112/8442 useless extension candidates. Maximal degree in co-relation 24401. Up to 1315 conditions per place. [2023-11-29 00:40:08,242 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 253 selfloop transitions, 87 changer transitions 131/480 dead transitions. [2023-11-29 00:40:08,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 480 transitions, 2954 flow [2023-11-29 00:40:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 00:40:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-29 00:40:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 829 transitions. [2023-11-29 00:40:08,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5981240981240982 [2023-11-29 00:40:08,246 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 829 transitions. [2023-11-29 00:40:08,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 829 transitions. [2023-11-29 00:40:08,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:08,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 829 transitions. [2023-11-29 00:40:08,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 19.738095238095237) internal successors, (829), 42 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:08,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 33.0) internal successors, (1419), 43 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:08,255 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 33.0) internal successors, (1419), 43 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:08,255 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 345 flow. Second operand 42 states and 829 transitions. [2023-11-29 00:40:08,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 480 transitions, 2954 flow [2023-11-29 00:40:08,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 480 transitions, 2948 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 00:40:08,274 INFO L231 Difference]: Finished difference. Result has 125 places, 147 transitions, 1491 flow [2023-11-29 00:40:08,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1491, PETRI_PLACES=125, PETRI_TRANSITIONS=147} [2023-11-29 00:40:08,275 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2023-11-29 00:40:08,275 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 147 transitions, 1491 flow [2023-11-29 00:40:08,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 11.233333333333333) internal successors, (337), 30 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:08,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:08,276 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:08,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:40:08,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:40:08,477 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 00:40:08,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:08,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1295488793, now seen corresponding path program 2 times [2023-11-29 00:40:08,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:08,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453247592] [2023-11-29 00:40:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:08,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:09,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:09,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453247592] [2023-11-29 00:40:09,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453247592] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:40:09,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643211650] [2023-11-29 00:40:09,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:40:09,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:09,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:09,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:09,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:40:09,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:40:09,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:40:09,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 00:40:09,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:10,495 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-11-29 00:40:10,496 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 47 treesize of output 20 [2023-11-29 00:40:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:10,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:10,933 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 00:40:10,934 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 74 treesize of output 60 [2023-11-29 00:40:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:11,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643211650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:11,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:40:11,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2023-11-29 00:40:11,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764216173] [2023-11-29 00:40:11,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:11,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 00:40:11,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:11,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 00:40:11,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:40:11,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:40:11,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 147 transitions, 1491 flow. Second operand has 29 states, 29 states have (on average 11.379310344827585) internal successors, (330), 29 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:11,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:11,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:40:11,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:18,122 INFO L124 PetriNetUnfolderBase]: 10991/23612 cut-off events. [2023-11-29 00:40:18,122 INFO L125 PetriNetUnfolderBase]: For 238414/238504 co-relation queries the response was YES. [2023-11-29 00:40:18,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88739 conditions, 23612 events. 10991/23612 cut-off events. For 238414/238504 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 215373 event pairs, 2237 based on Foata normal form. 106/21923 useless extension candidates. Maximal degree in co-relation 88698. Up to 3200 conditions per place. [2023-11-29 00:40:18,340 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 358 selfloop transitions, 244 changer transitions 128/739 dead transitions. [2023-11-29 00:40:18,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 739 transitions, 7642 flow [2023-11-29 00:40:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 00:40:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-29 00:40:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 772 transitions. [2023-11-29 00:40:18,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5998445998445998 [2023-11-29 00:40:18,345 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 772 transitions. [2023-11-29 00:40:18,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 772 transitions. [2023-11-29 00:40:18,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:18,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 772 transitions. [2023-11-29 00:40:18,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 19.794871794871796) internal successors, (772), 39 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:18,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 33.0) internal successors, (1320), 40 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:18,355 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 33.0) internal successors, (1320), 40 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:18,355 INFO L175 Difference]: Start difference. First operand has 125 places, 147 transitions, 1491 flow. Second operand 39 states and 772 transitions. [2023-11-29 00:40:18,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 739 transitions, 7642 flow [2023-11-29 00:40:18,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 739 transitions, 6129 flow, removed 748 selfloop flow, removed 7 redundant places. [2023-11-29 00:40:18,644 INFO L231 Difference]: Finished difference. Result has 179 places, 355 transitions, 4105 flow [2023-11-29 00:40:18,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4105, PETRI_PLACES=179, PETRI_TRANSITIONS=355} [2023-11-29 00:40:18,645 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 148 predicate places. [2023-11-29 00:40:18,645 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 355 transitions, 4105 flow [2023-11-29 00:40:18,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 11.379310344827585) internal successors, (330), 29 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:18,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:18,646 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:18,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:40:18,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:40:18,847 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 00:40:18,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:18,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1924068513, now seen corresponding path program 3 times [2023-11-29 00:40:18,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:18,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150640736] [2023-11-29 00:40:18,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:18,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:20,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:20,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150640736] [2023-11-29 00:40:20,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150640736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:40:20,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429656002] [2023-11-29 00:40:20,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:40:20,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:20,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:20,287 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:20,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:40:20,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 00:40:20,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:40:20,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:40:20,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:20,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:40:20,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:20,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:40:20,925 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 75 treesize of output 60 [2023-11-29 00:40:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:40:21,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429656002] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:21,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:40:21,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 23 [2023-11-29 00:40:21,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662998356] [2023-11-29 00:40:21,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:21,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:40:21,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:21,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:40:21,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:40:21,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:40:21,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 355 transitions, 4105 flow. Second operand has 24 states, 24 states have (on average 11.916666666666666) internal successors, (286), 24 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:21,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:21,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:40:21,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:26,363 INFO L124 PetriNetUnfolderBase]: 11295/24452 cut-off events. [2023-11-29 00:40:26,363 INFO L125 PetriNetUnfolderBase]: For 427778/427914 co-relation queries the response was YES. [2023-11-29 00:40:26,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101539 conditions, 24452 events. 11295/24452 cut-off events. For 427778/427914 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 226721 event pairs, 4419 based on Foata normal form. 96/22778 useless extension candidates. Maximal degree in co-relation 101473. Up to 13551 conditions per place. [2023-11-29 00:40:26,564 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 355 selfloop transitions, 78 changer transitions 73/515 dead transitions. [2023-11-29 00:40:26,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 515 transitions, 6214 flow [2023-11-29 00:40:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:40:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 00:40:26,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 351 transitions. [2023-11-29 00:40:26,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598086124401914 [2023-11-29 00:40:26,567 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 351 transitions. [2023-11-29 00:40:26,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 351 transitions. [2023-11-29 00:40:26,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:26,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 351 transitions. [2023-11-29 00:40:26,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 18.473684210526315) internal successors, (351), 19 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:26,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:26,569 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 33.0) internal successors, (660), 20 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:26,569 INFO L175 Difference]: Start difference. First operand has 179 places, 355 transitions, 4105 flow. Second operand 19 states and 351 transitions. [2023-11-29 00:40:26,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 515 transitions, 6214 flow [2023-11-29 00:40:27,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 515 transitions, 5404 flow, removed 396 selfloop flow, removed 8 redundant places. [2023-11-29 00:40:27,558 INFO L231 Difference]: Finished difference. Result has 191 places, 361 transitions, 3655 flow [2023-11-29 00:40:27,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3333, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3655, PETRI_PLACES=191, PETRI_TRANSITIONS=361} [2023-11-29 00:40:27,559 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 160 predicate places. [2023-11-29 00:40:27,560 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 361 transitions, 3655 flow [2023-11-29 00:40:27,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.916666666666666) internal successors, (286), 24 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:27,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:27,560 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:27,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:40:27,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:40:27,761 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 00:40:27,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:27,761 INFO L85 PathProgramCache]: Analyzing trace with hash -44319139, now seen corresponding path program 4 times [2023-11-29 00:40:27,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:27,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534831775] [2023-11-29 00:40:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:27,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:28,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:28,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534831775] [2023-11-29 00:40:28,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534831775] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:40:28,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885163626] [2023-11-29 00:40:28,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:40:28,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:28,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:28,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:28,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:40:29,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:40:29,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:40:29,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 00:40:29,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:40:29,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:29,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:40:29,487 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 75 treesize of output 60 [2023-11-29 00:40:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:40:29,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885163626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:29,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:40:29,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 20 [2023-11-29 00:40:29,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807630064] [2023-11-29 00:40:29,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:29,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 00:40:29,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:29,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 00:40:29,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:40:29,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:40:29,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 361 transitions, 3655 flow. Second operand has 21 states, 21 states have (on average 12.142857142857142) internal successors, (255), 21 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:29,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:29,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:40:29,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:35,387 INFO L124 PetriNetUnfolderBase]: 11735/25380 cut-off events. [2023-11-29 00:40:35,388 INFO L125 PetriNetUnfolderBase]: For 395055/395183 co-relation queries the response was YES. [2023-11-29 00:40:35,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99924 conditions, 25380 events. 11735/25380 cut-off events. For 395055/395183 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 237078 event pairs, 5125 based on Foata normal form. 64/23527 useless extension candidates. Maximal degree in co-relation 99856. Up to 16058 conditions per place. [2023-11-29 00:40:35,602 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 374 selfloop transitions, 53 changer transitions 69/505 dead transitions. [2023-11-29 00:40:35,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 505 transitions, 5606 flow [2023-11-29 00:40:35,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:40:35,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 00:40:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 334 transitions. [2023-11-29 00:40:35,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622895622895623 [2023-11-29 00:40:35,604 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 334 transitions. [2023-11-29 00:40:35,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 334 transitions. [2023-11-29 00:40:35,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:35,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 334 transitions. [2023-11-29 00:40:35,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 18.555555555555557) internal successors, (334), 18 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:35,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:35,606 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 33.0) internal successors, (627), 19 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:35,606 INFO L175 Difference]: Start difference. First operand has 191 places, 361 transitions, 3655 flow. Second operand 18 states and 334 transitions. [2023-11-29 00:40:35,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 505 transitions, 5606 flow [2023-11-29 00:40:36,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 505 transitions, 5373 flow, removed 52 selfloop flow, removed 13 redundant places. [2023-11-29 00:40:36,321 INFO L231 Difference]: Finished difference. Result has 198 places, 369 transitions, 3707 flow [2023-11-29 00:40:36,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3459, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3707, PETRI_PLACES=198, PETRI_TRANSITIONS=369} [2023-11-29 00:40:36,322 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 167 predicate places. [2023-11-29 00:40:36,322 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 369 transitions, 3707 flow [2023-11-29 00:40:36,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 12.142857142857142) internal successors, (255), 21 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:36,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:36,322 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:36,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:40:36,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:40:36,523 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 00:40:36,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1041684550, now seen corresponding path program 5 times [2023-11-29 00:40:36,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:36,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198075563] [2023-11-29 00:40:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:36,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:40:36,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:36,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198075563] [2023-11-29 00:40:36,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198075563] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:40:36,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675094911] [2023-11-29 00:40:36,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:40:36,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:36,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:36,669 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:36,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:40:36,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 00:40:36,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:40:36,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:40:36,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:40:36,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:40:36,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675094911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:36,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:40:36,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2023-11-29 00:40:36,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024503714] [2023-11-29 00:40:36,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:36,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:40:36,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:36,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:40:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:40:36,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:40:36,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 369 transitions, 3707 flow. Second operand has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 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 00:40:36,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:36,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:40:36,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:43,582 INFO L124 PetriNetUnfolderBase]: 16459/35872 cut-off events. [2023-11-29 00:40:43,582 INFO L125 PetriNetUnfolderBase]: For 513914/514129 co-relation queries the response was YES. [2023-11-29 00:40:43,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138606 conditions, 35872 events. 16459/35872 cut-off events. For 513914/514129 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 354349 event pairs, 5217 based on Foata normal form. 288/33572 useless extension candidates. Maximal degree in co-relation 138537. Up to 16931 conditions per place. [2023-11-29 00:40:43,892 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 342 selfloop transitions, 230 changer transitions 0/581 dead transitions. [2023-11-29 00:40:43,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 581 transitions, 6998 flow [2023-11-29 00:40:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:40:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:40:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2023-11-29 00:40:43,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2023-11-29 00:40:43,893 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 108 transitions. [2023-11-29 00:40:43,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 108 transitions. [2023-11-29 00:40:43,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:43,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 108 transitions. [2023-11-29 00:40:43,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.6) internal successors, (108), 5 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 00:40:43,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:43,895 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:43,895 INFO L175 Difference]: Start difference. First operand has 198 places, 369 transitions, 3707 flow. Second operand 5 states and 108 transitions. [2023-11-29 00:40:43,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 581 transitions, 6998 flow [2023-11-29 00:40:44,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 581 transitions, 6848 flow, removed 38 selfloop flow, removed 12 redundant places. [2023-11-29 00:40:44,833 INFO L231 Difference]: Finished difference. Result has 193 places, 532 transitions, 6403 flow [2023-11-29 00:40:44,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6403, PETRI_PLACES=193, PETRI_TRANSITIONS=532} [2023-11-29 00:40:44,834 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 162 predicate places. [2023-11-29 00:40:44,834 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 532 transitions, 6403 flow [2023-11-29 00:40:44,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 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 00:40:44,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:44,834 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 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 00:40:44,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:40:45,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:40:45,035 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 00:40:45,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:45,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1124044782, now seen corresponding path program 6 times [2023-11-29 00:40:45,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:45,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952890533] [2023-11-29 00:40:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:45,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:40:45,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:45,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952890533] [2023-11-29 00:40:45,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952890533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:40:45,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787754341] [2023-11-29 00:40:45,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:40:45,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:45,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:45,208 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:45,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:40:45,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 00:40:45,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:40:45,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:40:45,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:40:45,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:40:46,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787754341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:46,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:40:46,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-29 00:40:46,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431973979] [2023-11-29 00:40:46,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:46,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:40:46,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:46,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:40:46,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:40:46,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:40:46,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 532 transitions, 6403 flow. Second operand has 23 states, 23 states have (on average 11.695652173913043) internal successors, (269), 23 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:46,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:46,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:40:46,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:40:48,056 INFO L124 PetriNetUnfolderBase]: 3861/8336 cut-off events. [2023-11-29 00:40:48,056 INFO L125 PetriNetUnfolderBase]: For 177105/177123 co-relation queries the response was YES. [2023-11-29 00:40:48,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38601 conditions, 8336 events. 3861/8336 cut-off events. For 177105/177123 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 69467 event pairs, 1871 based on Foata normal form. 38/7693 useless extension candidates. Maximal degree in co-relation 38529. Up to 6116 conditions per place. [2023-11-29 00:40:48,112 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 94 selfloop transitions, 6 changer transitions 77/186 dead transitions. [2023-11-29 00:40:48,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 186 transitions, 2056 flow [2023-11-29 00:40:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:40:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 00:40:48,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 224 transitions. [2023-11-29 00:40:48,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221445221445221 [2023-11-29 00:40:48,113 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 224 transitions. [2023-11-29 00:40:48,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 224 transitions. [2023-11-29 00:40:48,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:40:48,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 224 transitions. [2023-11-29 00:40:48,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 17.23076923076923) internal successors, (224), 13 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:48,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:48,115 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:48,115 INFO L175 Difference]: Start difference. First operand has 193 places, 532 transitions, 6403 flow. Second operand 13 states and 224 transitions. [2023-11-29 00:40:48,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 186 transitions, 2056 flow [2023-11-29 00:40:48,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 186 transitions, 1666 flow, removed 146 selfloop flow, removed 39 redundant places. [2023-11-29 00:40:48,486 INFO L231 Difference]: Finished difference. Result has 122 places, 106 transitions, 1027 flow [2023-11-29 00:40:48,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1027, PETRI_PLACES=122, PETRI_TRANSITIONS=106} [2023-11-29 00:40:48,487 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 91 predicate places. [2023-11-29 00:40:48,487 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 106 transitions, 1027 flow [2023-11-29 00:40:48,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.695652173913043) internal successors, (269), 23 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:48,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:40:48,487 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:40:48,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:40:48,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:48,688 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 00:40:48,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:40:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash -200844534, now seen corresponding path program 7 times [2023-11-29 00:40:48,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:40:48,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834941119] [2023-11-29 00:40:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:40:48,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:40:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:50,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:40:50,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834941119] [2023-11-29 00:40:50,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834941119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:40:50,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148971005] [2023-11-29 00:40:50,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:40:50,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:40:50,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:40:50,287 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:40:50,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:40:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:40:50,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 00:40:50,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:40:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:50,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:40:51,666 INFO L349 Elim1Store]: treesize reduction 10, result has 88.2 percent of original size [2023-11-29 00:40:51,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 104 [2023-11-29 00:40:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:40:52,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148971005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:40:52,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:40:52,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2023-11-29 00:40:52,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919328304] [2023-11-29 00:40:52,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:40:52,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 00:40:52,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:40:52,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 00:40:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:40:52,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:40:52,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 106 transitions, 1027 flow. Second operand has 38 states, 38 states have (on average 11.210526315789474) internal successors, (426), 38 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:40:52,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:40:52,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:40:52,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:02,996 INFO L124 PetriNetUnfolderBase]: 13098/27999 cut-off events. [2023-11-29 00:41:02,996 INFO L125 PetriNetUnfolderBase]: For 147731/147743 co-relation queries the response was YES. [2023-11-29 00:41:03,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94875 conditions, 27999 events. 13098/27999 cut-off events. For 147731/147743 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 270363 event pairs, 2502 based on Foata normal form. 223/26099 useless extension candidates. Maximal degree in co-relation 94838. Up to 4401 conditions per place. [2023-11-29 00:41:03,155 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 541 selfloop transitions, 361 changer transitions 319/1230 dead transitions. [2023-11-29 00:41:03,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1230 transitions, 10752 flow [2023-11-29 00:41:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-29 00:41:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-11-29 00:41:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 1830 transitions. [2023-11-29 00:41:03,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027667984189723 [2023-11-29 00:41:03,160 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 1830 transitions. [2023-11-29 00:41:03,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 1830 transitions. [2023-11-29 00:41:03,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:03,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 1830 transitions. [2023-11-29 00:41:03,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 19.891304347826086) internal successors, (1830), 92 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:03,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 33.0) internal successors, (3069), 93 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:03,170 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 33.0) internal successors, (3069), 93 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:03,171 INFO L175 Difference]: Start difference. First operand has 122 places, 106 transitions, 1027 flow. Second operand 92 states and 1830 transitions. [2023-11-29 00:41:03,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1230 transitions, 10752 flow [2023-11-29 00:41:03,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1230 transitions, 10091 flow, removed 321 selfloop flow, removed 14 redundant places. [2023-11-29 00:41:03,285 INFO L231 Difference]: Finished difference. Result has 228 places, 460 transitions, 6704 flow [2023-11-29 00:41:03,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=6704, PETRI_PLACES=228, PETRI_TRANSITIONS=460} [2023-11-29 00:41:03,286 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 197 predicate places. [2023-11-29 00:41:03,286 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 460 transitions, 6704 flow [2023-11-29 00:41:03,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 11.210526315789474) internal successors, (426), 38 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:03,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:03,286 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:03,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:41:03,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:41:03,487 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 00:41:03,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:03,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2123377474, now seen corresponding path program 8 times [2023-11-29 00:41:03,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:03,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062436270] [2023-11-29 00:41:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:03,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:41:04,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:04,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062436270] [2023-11-29 00:41:04,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062436270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:41:04,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62591071] [2023-11-29 00:41:04,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:41:04,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:04,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:04,548 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:41:04,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:41:04,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:41:04,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:41:04,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 00:41:04,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:05,794 INFO L349 Elim1Store]: treesize reduction 99, result has 9.2 percent of original size [2023-11-29 00:41:05,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 27 [2023-11-29 00:41:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:41:05,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:41:06,591 INFO L349 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2023-11-29 00:41:06,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 114 [2023-11-29 00:41:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:41:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62591071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:41:07,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:41:07,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 37 [2023-11-29 00:41:07,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548095258] [2023-11-29 00:41:07,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:41:07,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 00:41:07,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:07,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 00:41:07,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:41:07,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:41:07,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 460 transitions, 6704 flow. Second operand has 38 states, 38 states have (on average 11.210526315789474) internal successors, (426), 38 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:07,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:07,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:41:07,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:29,983 INFO L124 PetriNetUnfolderBase]: 17100/37165 cut-off events. [2023-11-29 00:41:29,983 INFO L125 PetriNetUnfolderBase]: For 1206212/1206408 co-relation queries the response was YES. [2023-11-29 00:41:30,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168022 conditions, 37165 events. 17100/37165 cut-off events. For 1206212/1206408 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 382880 event pairs, 5754 based on Foata normal form. 1353/35448 useless extension candidates. Maximal degree in co-relation 167946. Up to 5284 conditions per place. [2023-11-29 00:41:30,294 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 409 selfloop transitions, 149 changer transitions 636/1203 dead transitions. [2023-11-29 00:41:30,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1203 transitions, 14684 flow [2023-11-29 00:41:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-29 00:41:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-11-29 00:41:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 1358 transitions. [2023-11-29 00:41:30,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5963987703118138 [2023-11-29 00:41:30,297 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 1358 transitions. [2023-11-29 00:41:30,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 1358 transitions. [2023-11-29 00:41:30,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:30,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 1358 transitions. [2023-11-29 00:41:30,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 19.681159420289855) internal successors, (1358), 69 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:30,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 33.0) internal successors, (2310), 70 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:30,304 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 33.0) internal successors, (2310), 70 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:30,304 INFO L175 Difference]: Start difference. First operand has 228 places, 460 transitions, 6704 flow. Second operand 69 states and 1358 transitions. [2023-11-29 00:41:30,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1203 transitions, 14684 flow [2023-11-29 00:41:31,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 1203 transitions, 12199 flow, removed 1211 selfloop flow, removed 23 redundant places. [2023-11-29 00:41:31,538 INFO L231 Difference]: Finished difference. Result has 304 places, 279 transitions, 4576 flow [2023-11-29 00:41:31,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2931, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=4576, PETRI_PLACES=304, PETRI_TRANSITIONS=279} [2023-11-29 00:41:31,539 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 273 predicate places. [2023-11-29 00:41:31,539 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 279 transitions, 4576 flow [2023-11-29 00:41:31,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 11.210526315789474) internal successors, (426), 38 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:31,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:31,539 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:31,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:41:31,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:31,740 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 00:41:31,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:31,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2001751958, now seen corresponding path program 9 times [2023-11-29 00:41:31,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:31,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636543281] [2023-11-29 00:41:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:31,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:41:32,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:32,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636543281] [2023-11-29 00:41:32,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636543281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:41:32,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169203121] [2023-11-29 00:41:32,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:41:32,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:32,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:32,556 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:41:32,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:41:32,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 00:41:32,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:41:32,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 00:41:32,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:41:33,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:41:34,509 INFO L349 Elim1Store]: treesize reduction 41, result has 60.2 percent of original size [2023-11-29 00:41:34,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 91 [2023-11-29 00:41:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:41:35,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169203121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:41:35,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:41:35,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2023-11-29 00:41:35,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091549263] [2023-11-29 00:41:35,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:41:35,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 00:41:35,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:35,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 00:41:35,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 00:41:35,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:41:35,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 279 transitions, 4576 flow. Second operand has 36 states, 36 states have (on average 11.333333333333334) internal successors, (408), 36 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:35,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:35,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:41:35,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:43,096 INFO L124 PetriNetUnfolderBase]: 9394/20239 cut-off events. [2023-11-29 00:41:43,096 INFO L125 PetriNetUnfolderBase]: For 1092236/1092310 co-relation queries the response was YES. [2023-11-29 00:41:43,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111496 conditions, 20239 events. 9394/20239 cut-off events. For 1092236/1092310 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 191521 event pairs, 4240 based on Foata normal form. 93/18604 useless extension candidates. Maximal degree in co-relation 111385. Up to 10032 conditions per place. [2023-11-29 00:41:43,392 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 224 selfloop transitions, 73 changer transitions 242/548 dead transitions. [2023-11-29 00:41:43,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 548 transitions, 7747 flow [2023-11-29 00:41:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 00:41:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 00:41:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 590 transitions. [2023-11-29 00:41:43,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587121212121212 [2023-11-29 00:41:43,395 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 590 transitions. [2023-11-29 00:41:43,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 590 transitions. [2023-11-29 00:41:43,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:43,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 590 transitions. [2023-11-29 00:41:43,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 18.4375) internal successors, (590), 32 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:43,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 33.0) internal successors, (1089), 33 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:43,401 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 33.0) internal successors, (1089), 33 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:43,401 INFO L175 Difference]: Start difference. First operand has 304 places, 279 transitions, 4576 flow. Second operand 32 states and 590 transitions. [2023-11-29 00:41:43,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 548 transitions, 7747 flow [2023-11-29 00:41:44,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 548 transitions, 5696 flow, removed 981 selfloop flow, removed 46 redundant places. [2023-11-29 00:41:44,674 INFO L231 Difference]: Finished difference. Result has 247 places, 242 transitions, 3089 flow [2023-11-29 00:41:44,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3083, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3089, PETRI_PLACES=247, PETRI_TRANSITIONS=242} [2023-11-29 00:41:44,675 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 216 predicate places. [2023-11-29 00:41:44,675 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 242 transitions, 3089 flow [2023-11-29 00:41:44,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 11.333333333333334) internal successors, (408), 36 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:44,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:44,676 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:44,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:41:44,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:44,876 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 00:41:44,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1042567832, now seen corresponding path program 10 times [2023-11-29 00:41:44,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:44,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275656336] [2023-11-29 00:41:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:44,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:41:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:41:46,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:41:46,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275656336] [2023-11-29 00:41:46,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275656336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:41:46,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488283512] [2023-11-29 00:41:46,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:41:46,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:46,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:41:46,143 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:41:46,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:41:46,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:41:46,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:41:46,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:41:46,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:41:46,389 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 00:41:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:41:47,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:41:48,466 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 171 treesize of output 153 [2023-11-29 00:41:48,540 INFO L349 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-11-29 00:41:48,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 554 treesize of output 428 [2023-11-29 00:41:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:41:49,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488283512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:41:49,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:41:49,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2023-11-29 00:41:49,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148489863] [2023-11-29 00:41:49,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:41:49,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 00:41:49,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:41:49,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 00:41:49,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:41:49,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:41:49,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 242 transitions, 3089 flow. Second operand has 38 states, 38 states have (on average 11.210526315789474) internal successors, (426), 38 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:49,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:41:49,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:41:49,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:41:58,223 INFO L124 PetriNetUnfolderBase]: 6197/13365 cut-off events. [2023-11-29 00:41:58,224 INFO L125 PetriNetUnfolderBase]: For 377814/377849 co-relation queries the response was YES. [2023-11-29 00:41:58,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63582 conditions, 13365 events. 6197/13365 cut-off events. For 377814/377849 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 120891 event pairs, 1924 based on Foata normal form. 132/12410 useless extension candidates. Maximal degree in co-relation 63493. Up to 5230 conditions per place. [2023-11-29 00:41:58,337 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 150 selfloop transitions, 41 changer transitions 359/559 dead transitions. [2023-11-29 00:41:58,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 559 transitions, 5501 flow [2023-11-29 00:41:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 00:41:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-29 00:41:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 884 transitions. [2023-11-29 00:41:58,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546691403834261 [2023-11-29 00:41:58,340 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 884 transitions. [2023-11-29 00:41:58,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 884 transitions. [2023-11-29 00:41:58,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:41:58,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 884 transitions. [2023-11-29 00:41:58,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 18.040816326530614) internal successors, (884), 49 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:58,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 33.0) internal successors, (1650), 50 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:58,348 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 33.0) internal successors, (1650), 50 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:58,348 INFO L175 Difference]: Start difference. First operand has 247 places, 242 transitions, 3089 flow. Second operand 49 states and 884 transitions. [2023-11-29 00:41:58,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 559 transitions, 5501 flow [2023-11-29 00:41:58,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 559 transitions, 4535 flow, removed 432 selfloop flow, removed 52 redundant places. [2023-11-29 00:41:58,720 INFO L231 Difference]: Finished difference. Result has 200 places, 141 transitions, 1693 flow [2023-11-29 00:41:58,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1693, PETRI_PLACES=200, PETRI_TRANSITIONS=141} [2023-11-29 00:41:58,720 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 169 predicate places. [2023-11-29 00:41:58,721 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 141 transitions, 1693 flow [2023-11-29 00:41:58,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 11.210526315789474) internal successors, (426), 38 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:41:58,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:41:58,721 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:41:58,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:41:58,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:41:58,922 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 00:41:58,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:41:58,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1523396664, now seen corresponding path program 11 times [2023-11-29 00:41:58,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:41:58,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904233949] [2023-11-29 00:41:58,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:41:58,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:41:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:01,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:01,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904233949] [2023-11-29 00:42:01,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904233949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:01,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451578645] [2023-11-29 00:42:01,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:42:01,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:01,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:01,440 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:01,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:42:01,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 00:42:01,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:01,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 00:42:01,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:02,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:02,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:42:02,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 114 [2023-11-29 00:42:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 00:42:02,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451578645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:02,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:02,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 8] total 31 [2023-11-29 00:42:02,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794404695] [2023-11-29 00:42:02,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:02,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 00:42:02,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:02,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 00:42:02,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:42:02,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:42:02,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 141 transitions, 1693 flow. Second operand has 32 states, 32 states have (on average 11.625) internal successors, (372), 32 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:02,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:42:02,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:42:02,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:42:06,341 INFO L124 PetriNetUnfolderBase]: 5384/11164 cut-off events. [2023-11-29 00:42:06,341 INFO L125 PetriNetUnfolderBase]: For 222219/222251 co-relation queries the response was YES. [2023-11-29 00:42:06,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50635 conditions, 11164 events. 5384/11164 cut-off events. For 222219/222251 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 96809 event pairs, 1766 based on Foata normal form. 30/10262 useless extension candidates. Maximal degree in co-relation 50564. Up to 4239 conditions per place. [2023-11-29 00:42:06,433 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 175 selfloop transitions, 56 changer transitions 97/337 dead transitions. [2023-11-29 00:42:06,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 337 transitions, 3628 flow [2023-11-29 00:42:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:42:06,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 00:42:06,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 447 transitions. [2023-11-29 00:42:06,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2023-11-29 00:42:06,435 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 447 transitions. [2023-11-29 00:42:06,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 447 transitions. [2023-11-29 00:42:06,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:42:06,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 447 transitions. [2023-11-29 00:42:06,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 18.625) internal successors, (447), 24 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:06,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 33.0) internal successors, (825), 25 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 00:42:06,439 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 33.0) internal successors, (825), 25 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 00:42:06,439 INFO L175 Difference]: Start difference. First operand has 200 places, 141 transitions, 1693 flow. Second operand 24 states and 447 transitions. [2023-11-29 00:42:06,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 337 transitions, 3628 flow [2023-11-29 00:42:06,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 337 transitions, 2931 flow, removed 335 selfloop flow, removed 35 redundant places. [2023-11-29 00:42:06,610 INFO L231 Difference]: Finished difference. Result has 138 places, 154 transitions, 1740 flow [2023-11-29 00:42:06,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1421, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1740, PETRI_PLACES=138, PETRI_TRANSITIONS=154} [2023-11-29 00:42:06,611 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 107 predicate places. [2023-11-29 00:42:06,611 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 154 transitions, 1740 flow [2023-11-29 00:42:06,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 11.625) internal successors, (372), 32 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:06,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:42:06,612 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:06,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:42:06,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:06,812 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 00:42:06,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:06,813 INFO L85 PathProgramCache]: Analyzing trace with hash -593605024, now seen corresponding path program 12 times [2023-11-29 00:42:06,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:06,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992900511] [2023-11-29 00:42:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:06,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:08,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:08,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992900511] [2023-11-29 00:42:08,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992900511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:08,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074365479] [2023-11-29 00:42:08,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:42:08,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:08,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:08,877 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:08,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:42:09,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 00:42:09,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:09,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 00:42:09,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:09,332 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 00:42:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:09,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:10,873 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 117 treesize of output 105 [2023-11-29 00:42:10,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:42:10,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 469 treesize of output 453 [2023-11-29 00:42:13,537 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 116 treesize of output 104 [2023-11-29 00:42:13,570 INFO L349 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-11-29 00:42:13,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 461 treesize of output 373 [2023-11-29 00:42:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 00:42:13,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074365479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:13,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:13,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 10] total 34 [2023-11-29 00:42:13,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135702330] [2023-11-29 00:42:13,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:13,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 00:42:13,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:13,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 00:42:13,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:42:13,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:42:13,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 154 transitions, 1740 flow. Second operand has 35 states, 35 states have (on average 11.428571428571429) internal successors, (400), 35 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:13,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:42:13,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:42:13,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:42:20,222 INFO L124 PetriNetUnfolderBase]: 11098/23838 cut-off events. [2023-11-29 00:42:20,222 INFO L125 PetriNetUnfolderBase]: For 94297/94349 co-relation queries the response was YES. [2023-11-29 00:42:20,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77322 conditions, 23838 events. 11098/23838 cut-off events. For 94297/94349 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 228089 event pairs, 1572 based on Foata normal form. 66/22218 useless extension candidates. Maximal degree in co-relation 77277. Up to 3478 conditions per place. [2023-11-29 00:42:20,366 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 254 selfloop transitions, 192 changer transitions 188/643 dead transitions. [2023-11-29 00:42:20,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 643 transitions, 6105 flow [2023-11-29 00:42:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 00:42:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-29 00:42:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 849 transitions. [2023-11-29 00:42:20,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125541125541125 [2023-11-29 00:42:20,368 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 849 transitions. [2023-11-29 00:42:20,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 849 transitions. [2023-11-29 00:42:20,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:42:20,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 849 transitions. [2023-11-29 00:42:20,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 20.214285714285715) internal successors, (849), 42 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:20,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 33.0) internal successors, (1419), 43 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:20,372 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 33.0) internal successors, (1419), 43 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:20,372 INFO L175 Difference]: Start difference. First operand has 138 places, 154 transitions, 1740 flow. Second operand 42 states and 849 transitions. [2023-11-29 00:42:20,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 643 transitions, 6105 flow [2023-11-29 00:42:20,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 643 transitions, 5872 flow, removed 51 selfloop flow, removed 13 redundant places. [2023-11-29 00:42:20,681 INFO L231 Difference]: Finished difference. Result has 186 places, 283 transitions, 4139 flow [2023-11-29 00:42:20,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=4139, PETRI_PLACES=186, PETRI_TRANSITIONS=283} [2023-11-29 00:42:20,681 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 155 predicate places. [2023-11-29 00:42:20,681 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 283 transitions, 4139 flow [2023-11-29 00:42:20,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 11.428571428571429) internal successors, (400), 35 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:20,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:42:20,682 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:20,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:42:20,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:20,882 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 00:42:20,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:20,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1280114506, now seen corresponding path program 13 times [2023-11-29 00:42:20,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:20,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788437649] [2023-11-29 00:42:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:20,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:22,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:22,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788437649] [2023-11-29 00:42:22,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788437649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:22,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271100902] [2023-11-29 00:42:22,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:42:22,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:22,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:22,303 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:22,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:42:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:22,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 00:42:22,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:22,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:23,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:42:23,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 114 [2023-11-29 00:42:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 00:42:23,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271100902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:23,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:23,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 8] total 31 [2023-11-29 00:42:23,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076701525] [2023-11-29 00:42:23,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:23,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 00:42:23,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:23,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 00:42:23,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2023-11-29 00:42:23,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:42:23,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 283 transitions, 4139 flow. Second operand has 32 states, 32 states have (on average 11.5625) internal successors, (370), 32 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:23,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:42:23,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:42:23,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:42:30,226 INFO L124 PetriNetUnfolderBase]: 13770/29373 cut-off events. [2023-11-29 00:42:30,227 INFO L125 PetriNetUnfolderBase]: For 157573/157637 co-relation queries the response was YES. [2023-11-29 00:42:30,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100637 conditions, 29373 events. 13770/29373 cut-off events. For 157573/157637 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 290846 event pairs, 4578 based on Foata normal form. 60/27231 useless extension candidates. Maximal degree in co-relation 100573. Up to 11742 conditions per place. [2023-11-29 00:42:30,452 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 319 selfloop transitions, 153 changer transitions 125/606 dead transitions. [2023-11-29 00:42:30,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 606 transitions, 7526 flow [2023-11-29 00:42:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 00:42:30,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 00:42:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 575 transitions. [2023-11-29 00:42:30,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6008359456635318 [2023-11-29 00:42:30,454 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 575 transitions. [2023-11-29 00:42:30,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 575 transitions. [2023-11-29 00:42:30,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:42:30,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 575 transitions. [2023-11-29 00:42:30,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 19.82758620689655) internal successors, (575), 29 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 00:42:30,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 33.0) internal successors, (990), 30 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,457 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 33.0) internal successors, (990), 30 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,457 INFO L175 Difference]: Start difference. First operand has 186 places, 283 transitions, 4139 flow. Second operand 29 states and 575 transitions. [2023-11-29 00:42:30,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 606 transitions, 7526 flow [2023-11-29 00:42:30,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 606 transitions, 6765 flow, removed 325 selfloop flow, removed 14 redundant places. [2023-11-29 00:42:30,979 INFO L231 Difference]: Finished difference. Result has 218 places, 347 transitions, 5114 flow [2023-11-29 00:42:30,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5114, PETRI_PLACES=218, PETRI_TRANSITIONS=347} [2023-11-29 00:42:30,980 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 187 predicate places. [2023-11-29 00:42:30,980 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 347 transitions, 5114 flow [2023-11-29 00:42:30,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 11.5625) internal successors, (370), 32 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:30,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:42:30,980 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:30,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:42:31,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:31,181 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 00:42:31,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:31,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1138138603, now seen corresponding path program 14 times [2023-11-29 00:42:31,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:31,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217418923] [2023-11-29 00:42:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:31,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 00:42:31,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217418923] [2023-11-29 00:42:31,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217418923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348634839] [2023-11-29 00:42:31,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:42:31,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:31,265 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:31,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:42:31,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:42:31,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:31,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:42:31,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:42:31,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 00:42:31,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348634839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:31,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:31,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 13 [2023-11-29 00:42:31,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362200809] [2023-11-29 00:42:31,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:31,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:42:31,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:31,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:42:31,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:42:31,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:42:31,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 347 transitions, 5114 flow. Second operand has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 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 00:42:31,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:42:31,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:42:31,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:42:39,545 INFO L124 PetriNetUnfolderBase]: 18618/39986 cut-off events. [2023-11-29 00:42:39,545 INFO L125 PetriNetUnfolderBase]: For 229082/229169 co-relation queries the response was YES. [2023-11-29 00:42:39,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138845 conditions, 39986 events. 18618/39986 cut-off events. For 229082/229169 co-relation queries the response was YES. Maximal size of possible extension queue 1170. Compared 411283 event pairs, 3824 based on Foata normal form. 44/37095 useless extension candidates. Maximal degree in co-relation 138763. Up to 15077 conditions per place. [2023-11-29 00:42:40,055 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 248 selfloop transitions, 257 changer transitions 0/514 dead transitions. [2023-11-29 00:42:40,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 514 transitions, 8668 flow [2023-11-29 00:42:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:42:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:42:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2023-11-29 00:42:40,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6616161616161617 [2023-11-29 00:42:40,056 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 131 transitions. [2023-11-29 00:42:40,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 131 transitions. [2023-11-29 00:42:40,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:42:40,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 131 transitions. [2023-11-29 00:42:40,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:40,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:40,057 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:40,058 INFO L175 Difference]: Start difference. First operand has 218 places, 347 transitions, 5114 flow. Second operand 6 states and 131 transitions. [2023-11-29 00:42:40,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 514 transitions, 8668 flow [2023-11-29 00:42:41,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 514 transitions, 7906 flow, removed 363 selfloop flow, removed 10 redundant places. [2023-11-29 00:42:41,412 INFO L231 Difference]: Finished difference. Result has 215 places, 470 transitions, 7399 flow [2023-11-29 00:42:41,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4642, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7399, PETRI_PLACES=215, PETRI_TRANSITIONS=470} [2023-11-29 00:42:41,412 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 184 predicate places. [2023-11-29 00:42:41,412 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 470 transitions, 7399 flow [2023-11-29 00:42:41,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 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 00:42:41,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:42:41,413 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:42:41,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:42:41,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:41,613 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 00:42:41,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:42:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash -130722816, now seen corresponding path program 15 times [2023-11-29 00:42:41,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:42:41,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393353209] [2023-11-29 00:42:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:42:41,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:42:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:42:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:42:44,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:42:44,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393353209] [2023-11-29 00:42:44,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393353209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:42:44,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869317559] [2023-11-29 00:42:44,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:42:44,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:42:44,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:42:44,532 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:42:44,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:42:44,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 00:42:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:42:44,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 00:42:44,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:42:45,161 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 00:42:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:45,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:42:47,141 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 116 treesize of output 104 [2023-11-29 00:42:47,157 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:42:47,157 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:42:47,159 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:42:47,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:42:47,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 461 treesize of output 415 [2023-11-29 00:42:48,028 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 117 treesize of output 105 [2023-11-29 00:42:48,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:42:48,040 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:42:48,041 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:42:48,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:42:48,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:42:48,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 471 treesize of output 371 [2023-11-29 00:42:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:42:48,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869317559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:42:48,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:42:48,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 50 [2023-11-29 00:42:48,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930050558] [2023-11-29 00:42:48,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:42:48,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 00:42:48,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:42:48,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 00:42:48,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=1983, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:42:48,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:42:48,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 470 transitions, 7399 flow. Second operand has 51 states, 51 states have (on average 10.901960784313726) internal successors, (556), 51 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:42:48,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:42:48,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:42:48,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:43:06,648 INFO L124 PetriNetUnfolderBase]: 28821/61200 cut-off events. [2023-11-29 00:43:06,648 INFO L125 PetriNetUnfolderBase]: For 433897/434020 co-relation queries the response was YES. [2023-11-29 00:43:07,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219992 conditions, 61200 events. 28821/61200 cut-off events. For 433897/434020 co-relation queries the response was YES. Maximal size of possible extension queue 1566. Compared 658263 event pairs, 6283 based on Foata normal form. 94/56682 useless extension candidates. Maximal degree in co-relation 219908. Up to 15728 conditions per place. [2023-11-29 00:43:07,290 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 460 selfloop transitions, 541 changer transitions 232/1242 dead transitions. [2023-11-29 00:43:07,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 1242 transitions, 17881 flow [2023-11-29 00:43:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 00:43:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-29 00:43:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 1032 transitions. [2023-11-29 00:43:07,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685950413223141 [2023-11-29 00:43:07,292 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 1032 transitions. [2023-11-29 00:43:07,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 1032 transitions. [2023-11-29 00:43:07,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:43:07,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 1032 transitions. [2023-11-29 00:43:07,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 18.763636363636362) internal successors, (1032), 55 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:07,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 33.0) internal successors, (1848), 56 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:07,296 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 33.0) internal successors, (1848), 56 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:07,296 INFO L175 Difference]: Start difference. First operand has 215 places, 470 transitions, 7399 flow. Second operand 55 states and 1032 transitions. [2023-11-29 00:43:07,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 1242 transitions, 17881 flow [2023-11-29 00:43:10,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1242 transitions, 17691 flow, removed 95 selfloop flow, removed 0 redundant places. [2023-11-29 00:43:10,199 INFO L231 Difference]: Finished difference. Result has 300 places, 803 transitions, 15538 flow [2023-11-29 00:43:10,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7307, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=15538, PETRI_PLACES=300, PETRI_TRANSITIONS=803} [2023-11-29 00:43:10,200 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 269 predicate places. [2023-11-29 00:43:10,200 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 803 transitions, 15538 flow [2023-11-29 00:43:10,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 10.901960784313726) internal successors, (556), 51 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:43:10,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:43:10,200 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:43:10,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:43:10,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 00:43:10,401 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 00:43:10,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:43:10,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1903974755, now seen corresponding path program 16 times [2023-11-29 00:43:10,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:43:10,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301045444] [2023-11-29 00:43:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:43:10,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:43:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:43:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:11,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:43:11,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301045444] [2023-11-29 00:43:11,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301045444] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:43:11,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222823408] [2023-11-29 00:43:11,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:43:11,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:43:11,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:43:11,793 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:43:11,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:43:11,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:43:11,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:43:11,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 00:43:11,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:43:12,028 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 00:43:13,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:43:13,184 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:43:13,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:43:13,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:43:13,187 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 00:43:13,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:43:13,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 28 [2023-11-29 00:43:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:43:13,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:43:17,640 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 262 treesize of output 238 [2023-11-29 00:43:18,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:43:18,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 1155 treesize of output 1076 [2023-11-29 00:49:49,833 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-11-29 00:49:49,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2023-11-29 00:49:49,834 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-29 00:49:49,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:49:50,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 00:49:50,035 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:268) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:410) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:394) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 77 more [2023-11-29 00:49:50,039 INFO L158 Benchmark]: Toolchain (without parser) took 599753.68ms. Allocated memory was 148.9MB in the beginning and 7.9GB in the end (delta: 7.7GB). Free memory was 112.3MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 7.1GB. Max. memory is 16.1GB. [2023-11-29 00:49:50,039 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 94.4MB. Free memory is still 47.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 00:49:50,039 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.86ms. Allocated memory is still 148.9MB. Free memory was 112.3MB in the beginning and 100.4MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 00:49:50,039 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.65ms. Allocated memory is still 148.9MB. Free memory was 100.4MB in the beginning and 98.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 00:49:50,039 INFO L158 Benchmark]: Boogie Preprocessor took 50.94ms. Allocated memory is still 148.9MB. Free memory was 98.4MB in the beginning and 95.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 00:49:50,040 INFO L158 Benchmark]: RCFGBuilder took 635.99ms. Allocated memory was 148.9MB in the beginning and 182.5MB in the end (delta: 33.6MB). Free memory was 95.9MB in the beginning and 144.2MB in the end (delta: -48.3MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. [2023-11-29 00:49:50,040 INFO L158 Benchmark]: TraceAbstraction took 598754.69ms. Allocated memory was 182.5MB in the beginning and 7.9GB in the end (delta: 7.7GB). Free memory was 144.2MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 7.1GB. Max. memory is 16.1GB. [2023-11-29 00:49:50,041 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 94.4MB. Free memory is still 47.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 261.86ms. Allocated memory is still 148.9MB. Free memory was 112.3MB in the beginning and 100.4MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.65ms. Allocated memory is still 148.9MB. Free memory was 100.4MB in the beginning and 98.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.94ms. Allocated memory is still 148.9MB. Free memory was 98.4MB in the beginning and 95.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 635.99ms. Allocated memory was 148.9MB in the beginning and 182.5MB in the end (delta: 33.6MB). Free memory was 95.9MB in the beginning and 144.2MB in the end (delta: -48.3MB). Peak memory consumption was 43.0MB. Max. memory is 16.1GB. * TraceAbstraction took 598754.69ms. Allocated memory was 182.5MB in the beginning and 7.9GB in the end (delta: 7.7GB). Free memory was 144.2MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 7.1GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/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_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:49:52,173 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:49:52,244 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-29 00:49:52,250 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:49:52,251 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:49:52,276 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:49:52,277 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:49:52,277 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:49:52,278 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:49:52,278 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:49:52,279 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:49:52,279 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:49:52,280 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:49:52,281 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:49:52,281 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:49:52,282 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:49:52,282 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:49:52,283 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:49:52,283 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:49:52,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:49:52,284 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:49:52,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:49:52,285 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:49:52,285 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:49:52,286 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 00:49:52,286 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 00:49:52,286 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:49:52,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:49:52,287 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:49:52,287 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:49:52,288 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:49:52,288 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:49:52,288 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:49:52,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:49:52,289 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:49:52,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:49:52,289 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:49:52,290 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 00:49:52,290 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 00:49:52,290 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:49:52,290 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:49:52,291 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:49:52,291 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:49:52,291 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:49:52,291 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 00:49:52,291 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_1d3d27fb-735b-45e0-a78a-a47e2cef100c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2023-11-29 00:49:52,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:49:52,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:49:52,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:49:52,607 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:49:52,608 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:49:52,609 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-29 00:49:55,353 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:49:55,559 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:49:55,559 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-29 00:49:55,568 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/data/414776b7e/2aa9ce4158954da086b505fb1bbd66ea/FLAGc825492cd [2023-11-29 00:49:55,582 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/data/414776b7e/2aa9ce4158954da086b505fb1bbd66ea [2023-11-29 00:49:55,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:49:55,586 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:49:55,587 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:49:55,587 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:49:55,596 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:49:55,597 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29852899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55, skipping insertion in model container [2023-11-29 00:49:55,599 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,622 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:49:55,793 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_1d3d27fb-735b-45e0-a78a-a47e2cef100c/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2023-11-29 00:49:55,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:49:55,814 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 00:49:55,819 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:49:55,831 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_1d3d27fb-735b-45e0-a78a-a47e2cef100c/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2023-11-29 00:49:55,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:49:55,838 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:49:55,858 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_1d3d27fb-735b-45e0-a78a-a47e2cef100c/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2676,2689] [2023-11-29 00:49:55,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:49:55,871 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:49:55,871 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 00:49:55,879 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:49:55,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55 WrapperNode [2023-11-29 00:49:55,879 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:49:55,880 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:49:55,881 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:49:55,881 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:49:55,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,898 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,923 INFO L138 Inliner]: procedures = 26, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 146 [2023-11-29 00:49:55,924 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:49:55,924 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:49:55,925 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:49:55,925 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:49:55,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,941 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,957 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2]. 40 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 00:49:55,958 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,958 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,968 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,972 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,975 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,977 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,988 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:49:55,989 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:49:55,990 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:49:55,990 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:49:55,991 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (1/1) ... [2023-11-29 00:49:55,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:49:56,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:56,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:49:56,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:49:56,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:49:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 00:49:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 00:49:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 00:49:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 00:49:56,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:49:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 00:49:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 00:49:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 00:49:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 00:49:56,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 00:49:56,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 00:49:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 00:49:56,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 00:49:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 00:49:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 00:49:56,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:49:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:49:56,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:49:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:49:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 00:49:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 00:49:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 00:49:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 00:49:56,068 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 00:49:56,191 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:49:56,193 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:49:56,469 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:49:56,737 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:49:56,737 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 00:49:56,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:49:56 BoogieIcfgContainer [2023-11-29 00:49:56,738 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:49:56,740 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:49:56,740 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:49:56,743 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:49:56,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:49:55" (1/3) ... [2023-11-29 00:49:56,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7643f868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:49:56, skipping insertion in model container [2023-11-29 00:49:56,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:49:55" (2/3) ... [2023-11-29 00:49:56,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7643f868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:49:56, skipping insertion in model container [2023-11-29 00:49:56,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:49:56" (3/3) ... [2023-11-29 00:49:56,746 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-11-29 00:49:56,755 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 00:49:56,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:49:56,765 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:49:56,765 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:49:56,809 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:49:56,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 80 flow [2023-11-29 00:49:56,870 INFO L124 PetriNetUnfolderBase]: 6/31 cut-off events. [2023-11-29 00:49:56,871 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:49:56,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 6/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2023-11-29 00:49:56,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 33 transitions, 80 flow [2023-11-29 00:49:56,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 30 transitions, 72 flow [2023-11-29 00:49:56,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:49:56,894 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;@4a524682, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:49:56,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 00:49:56,906 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:49:56,907 INFO L124 PetriNetUnfolderBase]: 6/29 cut-off events. [2023-11-29 00:49:56,907 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 00:49:56,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:49:56,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:56,908 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 00:49:56,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:56,913 INFO L85 PathProgramCache]: Analyzing trace with hash -605091252, now seen corresponding path program 1 times [2023-11-29 00:49:56,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:49:56,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052821871] [2023-11-29 00:49:56,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:56,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:49:56,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:49:56,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:49:56,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-29 00:49:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:57,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:49:57,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:57,096 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 00:49:57,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:57,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:49:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052821871] [2023-11-29 00:49:57,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052821871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:57,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:57,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:49:57,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915435944] [2023-11-29 00:49:57,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:57,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:49:57,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:49:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:49:57,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:49:57,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:49:57,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 72 flow. Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:57,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:49:57,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:49:57,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:49:57,279 INFO L124 PetriNetUnfolderBase]: 129/237 cut-off events. [2023-11-29 00:49:57,279 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 00:49:57,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 237 events. 129/237 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 974 event pairs, 86 based on Foata normal form. 38/217 useless extension candidates. Maximal degree in co-relation 397. Up to 212 conditions per place. [2023-11-29 00:49:57,284 INFO L140 encePairwiseOnDemand]: 31/33 looper letters, 21 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2023-11-29 00:49:57,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 110 flow [2023-11-29 00:49:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:49:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-29 00:49:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 41 transitions. [2023-11-29 00:49:57,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2023-11-29 00:49:57,297 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 41 transitions. [2023-11-29 00:49:57,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 41 transitions. [2023-11-29 00:49:57,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:49:57,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 41 transitions. [2023-11-29 00:49:57,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:57,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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 00:49:57,306 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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 00:49:57,308 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 2 states and 41 transitions. [2023-11-29 00:49:57,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 110 flow [2023-11-29 00:49:57,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 00:49:57,313 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 60 flow [2023-11-29 00:49:57,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2023-11-29 00:49:57,318 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-11-29 00:49:57,318 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 60 flow [2023-11-29 00:49:57,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:57,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:49:57,319 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 00:49:57,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:49:57,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:49:57,520 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 00:49:57,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:57,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1245458471, now seen corresponding path program 1 times [2023-11-29 00:49:57,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:49:57,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769059617] [2023-11-29 00:49:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:57,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:49:57,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:49:57,524 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:49:57,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-29 00:49:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:57,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:49:57,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:57,688 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 00:49:57,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:57,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:49:57,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769059617] [2023-11-29 00:49:57,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769059617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:57,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:57,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:49:57,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162086317] [2023-11-29 00:49:57,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:57,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:49:57,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:49:57,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:49:57,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:49:57,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:49:57,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:57,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:49:57,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:49:57,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:49:57,881 INFO L124 PetriNetUnfolderBase]: 189/356 cut-off events. [2023-11-29 00:49:57,881 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 00:49:57,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 356 events. 189/356 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1645 event pairs, 69 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 692. Up to 177 conditions per place. [2023-11-29 00:49:57,886 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 31 selfloop transitions, 2 changer transitions 4/44 dead transitions. [2023-11-29 00:49:57,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 169 flow [2023-11-29 00:49:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:49:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:49:57,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2023-11-29 00:49:57,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2023-11-29 00:49:57,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 65 transitions. [2023-11-29 00:49:57,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 65 transitions. [2023-11-29 00:49:57,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:49:57,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 65 transitions. [2023-11-29 00:49:57,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:57,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:57,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:57,891 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 60 flow. Second operand 3 states and 65 transitions. [2023-11-29 00:49:57,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 169 flow [2023-11-29 00:49:57,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 44 transitions, 169 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:49:57,894 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 72 flow [2023-11-29 00:49:57,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-11-29 00:49:57,895 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-11-29 00:49:57,895 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 72 flow [2023-11-29 00:49:57,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:57,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:49:57,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:57,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-29 00:49:58,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:49:58,099 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 00:49:58,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:58,100 INFO L85 PathProgramCache]: Analyzing trace with hash 439401640, now seen corresponding path program 1 times [2023-11-29 00:49:58,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:49:58,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609204132] [2023-11-29 00:49:58,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:58,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:49:58,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:49:58,102 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:49:58,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-29 00:49:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:58,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:49:58,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:58,256 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 00:49:58,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:58,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:49:58,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609204132] [2023-11-29 00:49:58,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609204132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:58,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:58,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:49:58,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047047498] [2023-11-29 00:49:58,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:58,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:49:58,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:49:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:49:58,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:49:58,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:49:58,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:58,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:49:58,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:49:58,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:49:58,421 INFO L124 PetriNetUnfolderBase]: 210/412 cut-off events. [2023-11-29 00:49:58,421 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-29 00:49:58,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 412 events. 210/412 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1881 event pairs, 87 based on Foata normal form. 12/337 useless extension candidates. Maximal degree in co-relation 797. Up to 236 conditions per place. [2023-11-29 00:49:58,424 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 24 selfloop transitions, 3 changer transitions 7/41 dead transitions. [2023-11-29 00:49:58,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 166 flow [2023-11-29 00:49:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:49:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:49:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-29 00:49:58,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6161616161616161 [2023-11-29 00:49:58,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-29 00:49:58,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-29 00:49:58,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:49:58,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-29 00:49:58,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:58,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:58,429 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:58,429 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 72 flow. Second operand 3 states and 61 transitions. [2023-11-29 00:49:58,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 166 flow [2023-11-29 00:49:58,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:49:58,431 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2023-11-29 00:49:58,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-29 00:49:58,432 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-11-29 00:49:58,433 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2023-11-29 00:49:58,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:58,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:49:58,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:58,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-29 00:49:58,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:49:58,634 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 00:49:58,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:58,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1459320706, now seen corresponding path program 1 times [2023-11-29 00:49:58,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:49:58,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78316928] [2023-11-29 00:49:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:58,635 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:49:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:49:58,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:49:58,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-29 00:49:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:58,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 00:49:58,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:58,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:59,297 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-29 00:49:59,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 141 treesize of output 84 [2023-11-29 00:50:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:03,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:50:03,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78316928] [2023-11-29 00:50:03,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78316928] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:03,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:50:03,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-29 00:50:03,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399680711] [2023-11-29 00:50:03,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:03,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:50:03,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:50:03,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:50:03,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:50:03,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:50:03,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 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 00:50:03,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:50:03,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:50:03,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:50:03,759 INFO L124 PetriNetUnfolderBase]: 342/676 cut-off events. [2023-11-29 00:50:03,759 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2023-11-29 00:50:03,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1426 conditions, 676 events. 342/676 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3654 event pairs, 57 based on Foata normal form. 1/546 useless extension candidates. Maximal degree in co-relation 1420. Up to 125 conditions per place. [2023-11-29 00:50:03,764 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 44 selfloop transitions, 6 changer transitions 22/79 dead transitions. [2023-11-29 00:50:03,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 79 transitions, 355 flow [2023-11-29 00:50:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:50:03,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:50:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2023-11-29 00:50:03,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6414141414141414 [2023-11-29 00:50:03,768 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 127 transitions. [2023-11-29 00:50:03,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 127 transitions. [2023-11-29 00:50:03,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:50:03,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 127 transitions. [2023-11-29 00:50:03,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:03,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:03,772 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:03,772 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 6 states and 127 transitions. [2023-11-29 00:50:03,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 79 transitions, 355 flow [2023-11-29 00:50:03,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 79 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:50:03,775 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 114 flow [2023-11-29 00:50:03,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-29 00:50:03,776 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2023-11-29 00:50:03,776 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 114 flow [2023-11-29 00:50:03,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 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 00:50:03,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:50:03,777 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:03,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-29 00:50:03,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:50:03,980 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 00:50:03,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:03,980 INFO L85 PathProgramCache]: Analyzing trace with hash 290974204, now seen corresponding path program 1 times [2023-11-29 00:50:03,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:50:03,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781438119] [2023-11-29 00:50:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:03,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:50:03,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:50:03,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:50:03,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-29 00:50:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:04,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:50:04,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:04,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:50:04,078 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:50:04,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781438119] [2023-11-29 00:50:04,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781438119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:50:04,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:50:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:50:04,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140394842] [2023-11-29 00:50:04,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:50:04,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:50:04,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:50:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:50:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:50:04,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2023-11-29 00:50:04,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:04,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:50:04,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2023-11-29 00:50:04,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:50:04,296 INFO L124 PetriNetUnfolderBase]: 392/714 cut-off events. [2023-11-29 00:50:04,296 INFO L125 PetriNetUnfolderBase]: For 238/238 co-relation queries the response was YES. [2023-11-29 00:50:04,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1590 conditions, 714 events. 392/714 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3467 event pairs, 219 based on Foata normal form. 10/618 useless extension candidates. Maximal degree in co-relation 1583. Up to 527 conditions per place. [2023-11-29 00:50:04,299 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 35 selfloop transitions, 2 changer transitions 3/45 dead transitions. [2023-11-29 00:50:04,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 226 flow [2023-11-29 00:50:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:50:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:50:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2023-11-29 00:50:04,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2023-11-29 00:50:04,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 58 transitions. [2023-11-29 00:50:04,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 58 transitions. [2023-11-29 00:50:04,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:50:04,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 58 transitions. [2023-11-29 00:50:04,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:04,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:04,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:04,303 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 114 flow. Second operand 3 states and 58 transitions. [2023-11-29 00:50:04,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 226 flow [2023-11-29 00:50:04,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 45 transitions, 214 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-29 00:50:04,307 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 104 flow [2023-11-29 00:50:04,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-29 00:50:04,308 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-11-29 00:50:04,308 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 104 flow [2023-11-29 00:50:04,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:04,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:50:04,308 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:04,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-11-29 00:50:04,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:50:04,511 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 00:50:04,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash -478432997, now seen corresponding path program 2 times [2023-11-29 00:50:04,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:50:04,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140963880] [2023-11-29 00:50:04,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:50:04,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:50:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:50:04,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:50:04,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-29 00:50:04,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:50:04,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:50:04,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:50:04,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:50:04,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:50:04,657 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:50:04,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140963880] [2023-11-29 00:50:04,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140963880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:50:04,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:50:04,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:50:04,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655361953] [2023-11-29 00:50:04,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:50:04,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:50:04,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:50:04,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:50:04,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:50:04,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:50:04,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:04,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:50:04,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:50:04,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:50:04,834 INFO L124 PetriNetUnfolderBase]: 326/638 cut-off events. [2023-11-29 00:50:04,835 INFO L125 PetriNetUnfolderBase]: For 181/184 co-relation queries the response was YES. [2023-11-29 00:50:04,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1420 conditions, 638 events. 326/638 cut-off events. For 181/184 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3508 event pairs, 282 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 1412. Up to 494 conditions per place. [2023-11-29 00:50:04,837 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 23 selfloop transitions, 2 changer transitions 14/47 dead transitions. [2023-11-29 00:50:04,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 219 flow [2023-11-29 00:50:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:50:04,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:50:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2023-11-29 00:50:04,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2023-11-29 00:50:04,839 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 73 transitions. [2023-11-29 00:50:04,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 73 transitions. [2023-11-29 00:50:04,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:50:04,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 73 transitions. [2023-11-29 00:50:04,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:04,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 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 00:50:04,842 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 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 00:50:04,842 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 104 flow. Second operand 4 states and 73 transitions. [2023-11-29 00:50:04,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 219 flow [2023-11-29 00:50:04,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:50:04,845 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 116 flow [2023-11-29 00:50:04,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-11-29 00:50:04,846 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2023-11-29 00:50:04,846 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 116 flow [2023-11-29 00:50:04,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:04,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:50:04,847 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:04,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-11-29 00:50:05,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:50:05,048 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 00:50:05,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:05,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2130797317, now seen corresponding path program 1 times [2023-11-29 00:50:05,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:50:05,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717863783] [2023-11-29 00:50:05,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:05,049 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:50:05,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:50:05,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:50:05,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-29 00:50:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:05,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:50:05,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:05,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:05,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:50:05,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717863783] [2023-11-29 00:50:05,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717863783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:05,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:50:05,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-29 00:50:05,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782999956] [2023-11-29 00:50:05,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:05,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:50:05,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:50:05,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:50:05,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:50:05,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:50:05,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 116 flow. Second operand has 12 states, 12 states have (on average 12.166666666666666) internal successors, (146), 12 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 00:50:05,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:50:05,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:50:05,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:50:06,574 INFO L124 PetriNetUnfolderBase]: 486/981 cut-off events. [2023-11-29 00:50:06,574 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2023-11-29 00:50:06,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2222 conditions, 981 events. 486/981 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5969 event pairs, 290 based on Foata normal form. 12/876 useless extension candidates. Maximal degree in co-relation 2212. Up to 494 conditions per place. [2023-11-29 00:50:06,579 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 23 selfloop transitions, 3 changer transitions 47/81 dead transitions. [2023-11-29 00:50:06,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 81 transitions, 396 flow [2023-11-29 00:50:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:50:06,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 00:50:06,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2023-11-29 00:50:06,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-11-29 00:50:06,582 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 143 transitions. [2023-11-29 00:50:06,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 143 transitions. [2023-11-29 00:50:06,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:50:06,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 143 transitions. [2023-11-29 00:50:06,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:06,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 33.0) internal successors, (297), 9 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:06,585 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 33.0) internal successors, (297), 9 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:06,585 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 116 flow. Second operand 8 states and 143 transitions. [2023-11-29 00:50:06,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 81 transitions, 396 flow [2023-11-29 00:50:06,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 81 transitions, 384 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-29 00:50:06,590 INFO L231 Difference]: Finished difference. Result has 50 places, 34 transitions, 142 flow [2023-11-29 00:50:06,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=142, PETRI_PLACES=50, PETRI_TRANSITIONS=34} [2023-11-29 00:50:06,591 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 19 predicate places. [2023-11-29 00:50:06,591 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 34 transitions, 142 flow [2023-11-29 00:50:06,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.166666666666666) internal successors, (146), 12 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 00:50:06,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:50:06,591 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:06,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-29 00:50:06,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:50:06,792 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 00:50:06,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:06,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1980280823, now seen corresponding path program 2 times [2023-11-29 00:50:06,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:50:06,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287148757] [2023-11-29 00:50:06,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:50:06,793 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:50:06,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:50:06,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:50:06,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-29 00:50:06,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:50:06,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:50:06,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:50:06,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:07,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:08,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:50:08,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287148757] [2023-11-29 00:50:08,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287148757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:08,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:50:08,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-29 00:50:08,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679738197] [2023-11-29 00:50:08,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:08,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:50:08,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:50:08,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:50:08,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:50:08,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2023-11-29 00:50:08,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 34 transitions, 142 flow. Second operand has 16 states, 16 states have (on average 11.5) internal successors, (184), 16 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:08,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:50:08,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2023-11-29 00:50:08,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:50:09,984 INFO L124 PetriNetUnfolderBase]: 1121/2366 cut-off events. [2023-11-29 00:50:09,984 INFO L125 PetriNetUnfolderBase]: For 2044/2067 co-relation queries the response was YES. [2023-11-29 00:50:09,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5754 conditions, 2366 events. 1121/2366 cut-off events. For 2044/2067 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15848 event pairs, 282 based on Foata normal form. 58/2233 useless extension candidates. Maximal degree in co-relation 5740. Up to 383 conditions per place. [2023-11-29 00:50:09,999 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 98 selfloop transitions, 28 changer transitions 23/157 dead transitions. [2023-11-29 00:50:09,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 157 transitions, 867 flow [2023-11-29 00:50:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:50:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 00:50:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 280 transitions. [2023-11-29 00:50:10,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2023-11-29 00:50:10,002 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 280 transitions. [2023-11-29 00:50:10,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 280 transitions. [2023-11-29 00:50:10,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:50:10,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 280 transitions. [2023-11-29 00:50:10,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 18.666666666666668) internal successors, (280), 15 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:10,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:10,006 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 33.0) internal successors, (528), 16 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:10,006 INFO L175 Difference]: Start difference. First operand has 50 places, 34 transitions, 142 flow. Second operand 15 states and 280 transitions. [2023-11-29 00:50:10,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 157 transitions, 867 flow [2023-11-29 00:50:10,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 157 transitions, 797 flow, removed 33 selfloop flow, removed 5 redundant places. [2023-11-29 00:50:10,014 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 384 flow [2023-11-29 00:50:10,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=384, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-11-29 00:50:10,015 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 34 predicate places. [2023-11-29 00:50:10,015 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 384 flow [2023-11-29 00:50:10,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.5) internal successors, (184), 16 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:10,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:50:10,016 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:10,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-29 00:50:10,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:50:10,220 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 00:50:10,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:10,220 INFO L85 PathProgramCache]: Analyzing trace with hash -627210965, now seen corresponding path program 3 times [2023-11-29 00:50:10,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:50:10,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446015436] [2023-11-29 00:50:10,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:50:10,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:50:10,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:50:10,222 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:50:10,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-29 00:50:10,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 00:50:10,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:50:10,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:50:10,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:50:10,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:50:10,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:50:10,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446015436] [2023-11-29 00:50:10,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446015436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:10,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:50:10,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2023-11-29 00:50:10,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106184453] [2023-11-29 00:50:10,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:10,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:50:10,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:50:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:50:10,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:50:10,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2023-11-29 00:50:10,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 384 flow. Second operand has 5 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 00:50:10,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:50:10,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2023-11-29 00:50:10,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:50:10,988 INFO L124 PetriNetUnfolderBase]: 2059/3956 cut-off events. [2023-11-29 00:50:10,988 INFO L125 PetriNetUnfolderBase]: For 7193/7193 co-relation queries the response was YES. [2023-11-29 00:50:10,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10906 conditions, 3956 events. 2059/3956 cut-off events. For 7193/7193 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 26005 event pairs, 412 based on Foata normal form. 210/3845 useless extension candidates. Maximal degree in co-relation 10885. Up to 1897 conditions per place. [2023-11-29 00:50:11,008 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 75 selfloop transitions, 4 changer transitions 4/87 dead transitions. [2023-11-29 00:50:11,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 87 transitions, 715 flow [2023-11-29 00:50:11,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:50:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:50:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2023-11-29 00:50:11,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2023-11-29 00:50:11,009 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 69 transitions. [2023-11-29 00:50:11,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 69 transitions. [2023-11-29 00:50:11,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:50:11,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 69 transitions. [2023-11-29 00:50:11,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:11,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 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 00:50:11,010 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 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 00:50:11,010 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 384 flow. Second operand 4 states and 69 transitions. [2023-11-29 00:50:11,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 87 transitions, 715 flow [2023-11-29 00:50:11,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 87 transitions, 673 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-11-29 00:50:11,020 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 355 flow [2023-11-29 00:50:11,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=355, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2023-11-29 00:50:11,022 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2023-11-29 00:50:11,022 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 355 flow [2023-11-29 00:50:11,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 00:50:11,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:50:11,022 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:11,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-11-29 00:50:11,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:50:11,227 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 00:50:11,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:11,227 INFO L85 PathProgramCache]: Analyzing trace with hash -151302625, now seen corresponding path program 1 times [2023-11-29 00:50:11,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:50:11,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946286376] [2023-11-29 00:50:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:11,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:50:11,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:50:11,229 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-29 00:50:11,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d3d27fb-735b-45e0-a78a-a47e2cef100c/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-29 00:50:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:11,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:50:11,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:11,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:50:11,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:29,405 INFO L349 Elim1Store]: treesize reduction 672, result has 23.7 percent of original size [2023-11-29 00:50:29,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 275 treesize of output 270