./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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_5725f0eb-b863-44e6-8a3d-0e954d601437/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 cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:19:16,244 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:19:16,305 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 03:19:16,309 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:19:16,310 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:19:16,331 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:19:16,332 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:19:16,332 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:19:16,333 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:19:16,333 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:19:16,334 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:19:16,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:19:16,335 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:19:16,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:19:16,336 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:19:16,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:19:16,337 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:19:16,337 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:19:16,338 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:19:16,338 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:19:16,338 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:19:16,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:19:16,341 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:19:16,341 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:19:16,342 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:19:16,342 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:19:16,342 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:19:16,343 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:19:16,343 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:19:16,343 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:19:16,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:19:16,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:19:16,345 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:19:16,345 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:19:16,345 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:19:16,345 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:19:16,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:19:16,346 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:19:16,346 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:19:16,348 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:19:16,348 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:19:16,348 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:19:16,349 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_5725f0eb-b863-44e6-8a3d-0e954d601437/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e [2023-11-29 03:19:16,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:19:16,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:19:16,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:19:16,595 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:19:16,596 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:19:16,597 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2023-11-29 03:19:19,315 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:19:19,493 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:19:19,493 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2023-11-29 03:19:19,501 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/data/154f46682/ad4de8cd49664fc2baa371774b433e9d/FLAG34004eb23 [2023-11-29 03:19:19,515 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/data/154f46682/ad4de8cd49664fc2baa371774b433e9d [2023-11-29 03:19:19,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:19:19,520 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:19:19,521 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:19:19,521 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:19:19,526 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:19:19,526 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,527 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1da1e471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19, skipping insertion in model container [2023-11-29 03:19:19,528 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,553 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:19:19,727 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_5725f0eb-b863-44e6-8a3d-0e954d601437/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2572,2585] [2023-11-29 03:19:19,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:19:19,747 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:19:19,770 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_5725f0eb-b863-44e6-8a3d-0e954d601437/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2572,2585] [2023-11-29 03:19:19,774 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:19:19,782 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:19:19,782 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:19:19,789 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:19:19,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19 WrapperNode [2023-11-29 03:19:19,790 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:19:19,791 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:19:19,791 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:19:19,791 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:19:19,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,807 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,837 INFO L138 Inliner]: procedures = 25, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 234 [2023-11-29 03:19:19,837 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:19:19,838 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:19:19,838 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:19:19,838 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:19:19,848 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,848 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,853 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,871 INFO L175 MemorySlicer]: Split 16 memory accesses to 5 slices as follows [2, 8, 2, 2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 03:19:19,871 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,871 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,881 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,886 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,889 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,891 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,896 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:19:19,897 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:19:19,897 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:19:19,897 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:19:19,898 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (1/1) ... [2023-11-29 03:19:19,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:19:19,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:19:19,928 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:19:19,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:19:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:19:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:19:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 03:19:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 03:19:19,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 03:19:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 03:19:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 03:19:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 03:19:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 03:19:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 03:19:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 03:19:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 03:19:19,965 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 03:19:19,965 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 03:19:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 03:19:19,966 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 03:19:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 03:19:19,966 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 03:19:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:19:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:19:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 03:19:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 03:19:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 03:19:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 03:19:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 03:19:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 03:19:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:19:19,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:19:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:19:19,968 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 03:19:20,076 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:19:20,078 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:19:20,399 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:19:20,747 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:19:20,747 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 03:19:20,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:19:20 BoogieIcfgContainer [2023-11-29 03:19:20,748 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:19:20,750 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:19:20,750 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:19:20,753 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:19:20,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:19:19" (1/3) ... [2023-11-29 03:19:20,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19272af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:19:20, skipping insertion in model container [2023-11-29 03:19:20,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:19:19" (2/3) ... [2023-11-29 03:19:20,755 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19272af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:19:20, skipping insertion in model container [2023-11-29 03:19:20,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:19:20" (3/3) ... [2023-11-29 03:19:20,756 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2023-11-29 03:19:20,766 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 03:19:20,777 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:19:20,777 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:19:20,777 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 03:19:20,832 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 03:19:20,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 31 transitions, 83 flow [2023-11-29 03:19:20,893 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-29 03:19:20,893 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 03:19:20,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 4/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-29 03:19:20,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 31 transitions, 83 flow [2023-11-29 03:19:20,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 27 transitions, 72 flow [2023-11-29 03:19:20,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:19:20,915 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;@509a86b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:19:20,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 03:19:20,927 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:19:20,927 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2023-11-29 03:19:20,928 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 03:19:20,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:19:20,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:19:20,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:19:20,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:19:20,934 INFO L85 PathProgramCache]: Analyzing trace with hash -524449101, now seen corresponding path program 1 times [2023-11-29 03:19:20,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:19:20,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034892114] [2023-11-29 03:19:20,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:19:20,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:19:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:19:21,405 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 03:19:21,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:19:21,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034892114] [2023-11-29 03:19:21,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034892114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:19:21,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:19:21,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:19:21,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641153828] [2023-11-29 03:19:21,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:19:21,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:19:21,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:19:21,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:19:21,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:19:21,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2023-11-29 03:19:21,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:21,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:19:21,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2023-11-29 03:19:21,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:19:21,671 INFO L124 PetriNetUnfolderBase]: 488/738 cut-off events. [2023-11-29 03:19:21,672 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-11-29 03:19:21,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1536 conditions, 738 events. 488/738 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2605 event pairs, 138 based on Foata normal form. 1/612 useless extension candidates. Maximal degree in co-relation 1176. Up to 474 conditions per place. [2023-11-29 03:19:21,682 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 39 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2023-11-29 03:19:21,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 213 flow [2023-11-29 03:19:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:19:21,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:19:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2023-11-29 03:19:21,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2023-11-29 03:19:21,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 60 transitions. [2023-11-29 03:19:21,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 60 transitions. [2023-11-29 03:19:21,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:19:21,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 60 transitions. [2023-11-29 03:19:21,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:21,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:21,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:21,706 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 72 flow. Second operand 3 states and 60 transitions. [2023-11-29 03:19:21,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 213 flow [2023-11-29 03:19:21,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 191 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 03:19:21,730 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 86 flow [2023-11-29 03:19:21,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2023-11-29 03:19:21,735 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-11-29 03:19:21,736 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 86 flow [2023-11-29 03:19:21,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:21,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:19:21,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:19:21,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:19:21,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:19:21,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:19:21,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1014919779, now seen corresponding path program 1 times [2023-11-29 03:19:21,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:19:21,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390825973] [2023-11-29 03:19:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:19:21,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:19:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:19:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:19:21,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:19:21,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390825973] [2023-11-29 03:19:21,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390825973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:19:21,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:19:21,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:19:21,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932390376] [2023-11-29 03:19:21,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:19:21,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:19:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:19:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:19:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:19:21,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2023-11-29 03:19:21,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:21,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:19:21,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2023-11-29 03:19:21,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:19:22,047 INFO L124 PetriNetUnfolderBase]: 488/755 cut-off events. [2023-11-29 03:19:22,047 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2023-11-29 03:19:22,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1762 conditions, 755 events. 488/755 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2657 event pairs, 321 based on Foata normal form. 0/754 useless extension candidates. Maximal degree in co-relation 557. Up to 718 conditions per place. [2023-11-29 03:19:22,055 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 27 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-11-29 03:19:22,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 146 flow [2023-11-29 03:19:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:19:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:19:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-29 03:19:22,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2023-11-29 03:19:22,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-29 03:19:22,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-29 03:19:22,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:19:22,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-29 03:19:22,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 03:19:22,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:22,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:22,059 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 86 flow. Second operand 3 states and 42 transitions. [2023-11-29 03:19:22,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 146 flow [2023-11-29 03:19:22,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:19:22,062 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 94 flow [2023-11-29 03:19:22,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2023-11-29 03:19:22,063 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-11-29 03:19:22,063 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 94 flow [2023-11-29 03:19:22,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:22,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:19:22,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:19:22,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 03:19:22,064 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:19:22,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:19:22,064 INFO L85 PathProgramCache]: Analyzing trace with hash 93359912, now seen corresponding path program 1 times [2023-11-29 03:19:22,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:19:22,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989382538] [2023-11-29 03:19:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:19:22,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:19:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:19:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:19:22,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:19:22,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989382538] [2023-11-29 03:19:22,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989382538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:19:22,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:19:22,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:19:22,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894828541] [2023-11-29 03:19:22,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:19:22,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:19:22,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:19:22,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:19:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:19:22,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2023-11-29 03:19:22,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:22,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:19:22,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2023-11-29 03:19:22,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:19:22,342 INFO L124 PetriNetUnfolderBase]: 601/881 cut-off events. [2023-11-29 03:19:22,342 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-11-29 03:19:22,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 881 events. 601/881 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2850 event pairs, 186 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 1989. Up to 468 conditions per place. [2023-11-29 03:19:22,349 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 40 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-11-29 03:19:22,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 45 transitions, 220 flow [2023-11-29 03:19:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:19:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:19:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2023-11-29 03:19:22,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2023-11-29 03:19:22,351 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 55 transitions. [2023-11-29 03:19:22,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 55 transitions. [2023-11-29 03:19:22,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:19:22,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 55 transitions. [2023-11-29 03:19:22,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 03:19:22,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 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 03:19:22,353 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 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 03:19:22,353 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 94 flow. Second operand 4 states and 55 transitions. [2023-11-29 03:19:22,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 45 transitions, 220 flow [2023-11-29 03:19:22,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 214 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-29 03:19:22,357 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 109 flow [2023-11-29 03:19:22,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-29 03:19:22,358 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-11-29 03:19:22,358 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 109 flow [2023-11-29 03:19:22,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:22,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:19:22,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:19:22,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 03:19:22,359 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:19:22,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:19:22,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1732050716, now seen corresponding path program 1 times [2023-11-29 03:19:22,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:19:22,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125675476] [2023-11-29 03:19:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:19:22,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:19:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:19:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:19:22,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:19:22,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125675476] [2023-11-29 03:19:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125675476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:19:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351713912] [2023-11-29 03:19:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:19:22,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:19:22,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:19:22,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:19:22,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:19:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:19:22,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:19:22,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:19:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:19:22,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:19:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:19:22,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351713912] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:19:22,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:19:22,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-29 03:19:22,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645890839] [2023-11-29 03:19:22,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:19:22,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:19:22,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:19:22,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:19:22,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:19:22,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2023-11-29 03:19:22,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 109 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:22,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:19:22,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2023-11-29 03:19:22,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:19:22,939 INFO L124 PetriNetUnfolderBase]: 476/728 cut-off events. [2023-11-29 03:19:22,940 INFO L125 PetriNetUnfolderBase]: For 317/317 co-relation queries the response was YES. [2023-11-29 03:19:22,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1894 conditions, 728 events. 476/728 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2448 event pairs, 222 based on Foata normal form. 50/778 useless extension candidates. Maximal degree in co-relation 1874. Up to 513 conditions per place. [2023-11-29 03:19:22,945 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 39 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-11-29 03:19:22,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 249 flow [2023-11-29 03:19:22,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:19:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:19:22,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2023-11-29 03:19:22,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2023-11-29 03:19:22,947 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 65 transitions. [2023-11-29 03:19:22,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 65 transitions. [2023-11-29 03:19:22,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:19:22,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 65 transitions. [2023-11-29 03:19:22,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 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 03:19:22,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:22,950 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 31.0) internal successors, (186), 6 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:22,950 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 109 flow. Second operand 5 states and 65 transitions. [2023-11-29 03:19:22,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 249 flow [2023-11-29 03:19:22,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 243 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:19:22,954 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 126 flow [2023-11-29 03:19:22,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-11-29 03:19:22,955 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-11-29 03:19:22,956 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 126 flow [2023-11-29 03:19:22,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:22,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:19:22,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:19:22,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-29 03:19:23,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:19:23,162 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:19:23,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:19:23,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1255150857, now seen corresponding path program 1 times [2023-11-29 03:19:23,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:19:23,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558608827] [2023-11-29 03:19:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:19:23,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:19:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:19:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:19:24,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:19:24,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558608827] [2023-11-29 03:19:24,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558608827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:19:24,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466514219] [2023-11-29 03:19:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:19:24,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:19:24,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:19:24,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:19:24,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:19:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:19:24,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 03:19:24,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:19:24,895 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 03:19:25,512 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 72 treesize of output 40 [2023-11-29 03:19:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:19:25,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:19:27,472 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 98 treesize of output 90 [2023-11-29 03:19:27,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:19:27,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 124 [2023-11-29 03:19:28,219 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 416 treesize of output 376 [2023-11-29 03:19:28,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:19:28,363 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 691 treesize of output 675 [2023-11-29 03:19:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:19:45,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466514219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:19:45,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:19:45,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-29 03:19:45,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713466070] [2023-11-29 03:19:45,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:19:45,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 03:19:45,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:19:45,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 03:19:45,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:19:45,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2023-11-29 03:19:45,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 126 flow. Second operand has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:45,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:19:45,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2023-11-29 03:19:45,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:19:46,959 INFO L124 PetriNetUnfolderBase]: 865/1356 cut-off events. [2023-11-29 03:19:46,959 INFO L125 PetriNetUnfolderBase]: For 912/930 co-relation queries the response was YES. [2023-11-29 03:19:46,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 1356 events. 865/1356 cut-off events. For 912/930 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5609 event pairs, 58 based on Foata normal form. 19/1375 useless extension candidates. Maximal degree in co-relation 2882. Up to 765 conditions per place. [2023-11-29 03:19:46,972 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 81 selfloop transitions, 23 changer transitions 1/108 dead transitions. [2023-11-29 03:19:46,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 108 transitions, 574 flow [2023-11-29 03:19:46,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 03:19:46,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 03:19:46,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2023-11-29 03:19:46,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-29 03:19:46,975 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 155 transitions. [2023-11-29 03:19:46,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 155 transitions. [2023-11-29 03:19:46,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:19:46,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 155 transitions. [2023-11-29 03:19:46,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 15.5) internal successors, (155), 10 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 03:19:46,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 31.0) internal successors, (341), 11 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:46,978 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 31.0) internal successors, (341), 11 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:46,978 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 126 flow. Second operand 10 states and 155 transitions. [2023-11-29 03:19:46,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 108 transitions, 574 flow [2023-11-29 03:19:46,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 108 transitions, 558 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-29 03:19:46,984 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 274 flow [2023-11-29 03:19:46,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=274, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2023-11-29 03:19:46,985 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 16 predicate places. [2023-11-29 03:19:46,985 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 274 flow [2023-11-29 03:19:46,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:19:46,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:19:46,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:19:46,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:19:47,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:19:47,191 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:19:47,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:19:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1098108613, now seen corresponding path program 2 times [2023-11-29 03:19:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:19:47,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17608211] [2023-11-29 03:19:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:19:47,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:19:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:19:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:19:48,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:19:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17608211] [2023-11-29 03:19:48,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17608211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:19:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898322941] [2023-11-29 03:19:48,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:19:48,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:19:48,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:19:48,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:19:48,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:19:48,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:19:48,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:19:48,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 03:19:48,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:19:48,186 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 03:19:48,674 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 66 treesize of output 38 [2023-11-29 03:19:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:19:48,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:19:51,738 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 416 treesize of output 376 [2023-11-29 03:19:51,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:19:51,846 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 691 treesize of output 675 [2023-11-29 03:20:11,967 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 03:24:54,053 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 98 treesize of output 90 [2023-11-29 03:24:54,069 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-29 03:24:54,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 1 [2023-11-29 03:24:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:24:54,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898322941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:24:54,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:24:54,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-29 03:24:54,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437058302] [2023-11-29 03:24:54,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:24:54,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 03:24:54,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:24:54,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 03:24:54,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2023-11-29 03:24:54,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2023-11-29 03:24:54,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 274 flow. Second operand has 25 states, 25 states have (on average 6.96) internal successors, (174), 25 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:24:54,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:24:54,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2023-11-29 03:24:54,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:24:56,321 INFO L124 PetriNetUnfolderBase]: 1513/2203 cut-off events. [2023-11-29 03:24:56,322 INFO L125 PetriNetUnfolderBase]: For 2402/2402 co-relation queries the response was YES. [2023-11-29 03:24:56,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7074 conditions, 2203 events. 1513/2203 cut-off events. For 2402/2402 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8821 event pairs, 250 based on Foata normal form. 1/2204 useless extension candidates. Maximal degree in co-relation 6487. Up to 1554 conditions per place. [2023-11-29 03:24:56,345 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 106 selfloop transitions, 36 changer transitions 1/144 dead transitions. [2023-11-29 03:24:56,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 144 transitions, 905 flow [2023-11-29 03:24:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 03:24:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 03:24:56,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 181 transitions. [2023-11-29 03:24:56,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4491315136476427 [2023-11-29 03:24:56,348 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 181 transitions. [2023-11-29 03:24:56,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 181 transitions. [2023-11-29 03:24:56,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:24:56,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 181 transitions. [2023-11-29 03:24:56,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 13.923076923076923) internal successors, (181), 13 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:24:56,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 31.0) internal successors, (434), 14 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:24:56,353 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 31.0) internal successors, (434), 14 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:24:56,353 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 274 flow. Second operand 13 states and 181 transitions. [2023-11-29 03:24:56,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 144 transitions, 905 flow [2023-11-29 03:24:56,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 144 transitions, 852 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-11-29 03:24:56,363 INFO L231 Difference]: Finished difference. Result has 63 places, 75 transitions, 497 flow [2023-11-29 03:24:56,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=497, PETRI_PLACES=63, PETRI_TRANSITIONS=75} [2023-11-29 03:24:56,364 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 30 predicate places. [2023-11-29 03:24:56,364 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 75 transitions, 497 flow [2023-11-29 03:24:56,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.96) internal successors, (174), 25 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:24:56,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:24:56,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:24:56,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:24:56,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:24:56,566 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:24:56,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:24:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash -694250809, now seen corresponding path program 3 times [2023-11-29 03:24:56,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:24:56,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294239796] [2023-11-29 03:24:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:24:56,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:24:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:24:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:24:57,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:24:57,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294239796] [2023-11-29 03:24:57,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294239796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:24:57,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769119127] [2023-11-29 03:24:57,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:24:57,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:24:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:24:57,817 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:24:57,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:24:58,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 03:24:58,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:24:58,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 03:24:58,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:24:58,647 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 66 treesize of output 38 [2023-11-29 03:24:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:24:58,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:24:59,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:24:59,278 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 205 treesize of output 109 [2023-11-29 03:24:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:24:59,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769119127] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:24:59,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:24:59,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2023-11-29 03:24:59,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242349686] [2023-11-29 03:24:59,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:24:59,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 03:24:59,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:24:59,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 03:24:59,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-29 03:24:59,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2023-11-29 03:24:59,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 75 transitions, 497 flow. Second operand has 25 states, 25 states have (on average 7.0) internal successors, (175), 25 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:24:59,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:24:59,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2023-11-29 03:24:59,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:01,432 INFO L124 PetriNetUnfolderBase]: 1857/2700 cut-off events. [2023-11-29 03:25:01,433 INFO L125 PetriNetUnfolderBase]: For 3827/3827 co-relation queries the response was YES. [2023-11-29 03:25:01,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9599 conditions, 2700 events. 1857/2700 cut-off events. For 3827/3827 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11325 event pairs, 272 based on Foata normal form. 1/2701 useless extension candidates. Maximal degree in co-relation 8719. Up to 2095 conditions per place. [2023-11-29 03:25:01,457 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 132 selfloop transitions, 72 changer transitions 1/206 dead transitions. [2023-11-29 03:25:01,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 206 transitions, 1524 flow [2023-11-29 03:25:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 03:25:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 03:25:01,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 263 transitions. [2023-11-29 03:25:01,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3688639551192146 [2023-11-29 03:25:01,460 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 263 transitions. [2023-11-29 03:25:01,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 263 transitions. [2023-11-29 03:25:01,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:01,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 263 transitions. [2023-11-29 03:25:01,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 11.434782608695652) internal successors, (263), 23 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:01,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 31.0) internal successors, (744), 24 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:01,465 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 31.0) internal successors, (744), 24 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:01,465 INFO L175 Difference]: Start difference. First operand has 63 places, 75 transitions, 497 flow. Second operand 23 states and 263 transitions. [2023-11-29 03:25:01,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 206 transitions, 1524 flow [2023-11-29 03:25:01,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 206 transitions, 1468 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-11-29 03:25:01,477 INFO L231 Difference]: Finished difference. Result has 95 places, 126 transitions, 1053 flow [2023-11-29 03:25:01,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1053, PETRI_PLACES=95, PETRI_TRANSITIONS=126} [2023-11-29 03:25:01,478 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 62 predicate places. [2023-11-29 03:25:01,478 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 126 transitions, 1053 flow [2023-11-29 03:25:01,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.0) internal successors, (175), 25 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:01,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:01,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:25:01,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:25:01,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:25:01,680 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:25:01,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:01,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1235581127, now seen corresponding path program 4 times [2023-11-29 03:25:01,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:01,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650405398] [2023-11-29 03:25:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:01,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:02,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:02,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650405398] [2023-11-29 03:25:02,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650405398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:25:02,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827907070] [2023-11-29 03:25:02,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:25:02,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:25:02,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:25:02,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:25:02,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:25:02,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:25:02,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:25:02,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 03:25:02,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:25:02,814 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 03:25:03,232 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 66 treesize of output 38 [2023-11-29 03:25:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:03,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:25:05,020 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 96 treesize of output 86 [2023-11-29 03:25:05,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 125 treesize of output 115 [2023-11-29 03:25:05,109 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 69 treesize of output 61 [2023-11-29 03:25:05,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 92 treesize of output 84 [2023-11-29 03:25:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:05,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827907070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:25:05,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:25:05,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2023-11-29 03:25:05,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974063458] [2023-11-29 03:25:05,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:25:05,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 03:25:05,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:05,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 03:25:05,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2023-11-29 03:25:05,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2023-11-29 03:25:05,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 126 transitions, 1053 flow. Second operand has 28 states, 28 states have (on average 6.678571428571429) internal successors, (187), 28 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:05,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:05,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2023-11-29 03:25:05,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:07,100 INFO L124 PetriNetUnfolderBase]: 2110/3095 cut-off events. [2023-11-29 03:25:07,100 INFO L125 PetriNetUnfolderBase]: For 12062/12062 co-relation queries the response was YES. [2023-11-29 03:25:07,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14331 conditions, 3095 events. 2110/3095 cut-off events. For 12062/12062 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13434 event pairs, 420 based on Foata normal form. 2/3097 useless extension candidates. Maximal degree in co-relation 13244. Up to 2340 conditions per place. [2023-11-29 03:25:07,132 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 149 selfloop transitions, 99 changer transitions 2/251 dead transitions. [2023-11-29 03:25:07,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 251 transitions, 2365 flow [2023-11-29 03:25:07,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 03:25:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 03:25:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 249 transitions. [2023-11-29 03:25:07,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40161290322580645 [2023-11-29 03:25:07,134 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 249 transitions. [2023-11-29 03:25:07,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 249 transitions. [2023-11-29 03:25:07,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:07,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 249 transitions. [2023-11-29 03:25:07,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 12.45) internal successors, (249), 20 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:07,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 31.0) internal successors, (651), 21 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:07,137 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 31.0) internal successors, (651), 21 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:07,137 INFO L175 Difference]: Start difference. First operand has 95 places, 126 transitions, 1053 flow. Second operand 20 states and 249 transitions. [2023-11-29 03:25:07,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 251 transitions, 2365 flow [2023-11-29 03:25:07,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 251 transitions, 2228 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-29 03:25:07,160 INFO L231 Difference]: Finished difference. Result has 116 places, 165 transitions, 1595 flow [2023-11-29 03:25:07,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1595, PETRI_PLACES=116, PETRI_TRANSITIONS=165} [2023-11-29 03:25:07,161 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 83 predicate places. [2023-11-29 03:25:07,161 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 165 transitions, 1595 flow [2023-11-29 03:25:07,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.678571428571429) internal successors, (187), 28 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:07,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:07,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:25:07,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 03:25:07,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:25:07,362 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:25:07,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:07,363 INFO L85 PathProgramCache]: Analyzing trace with hash 895794741, now seen corresponding path program 5 times [2023-11-29 03:25:07,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:07,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951090009] [2023-11-29 03:25:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:07,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:08,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:08,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951090009] [2023-11-29 03:25:08,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951090009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:25:08,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323239250] [2023-11-29 03:25:08,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:25:08,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:25:08,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:25:08,449 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:25:08,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:25:08,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 03:25:08,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:25:08,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 03:25:08,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:25:08,643 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 03:25:09,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:25:09,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 81 [2023-11-29 03:25:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:09,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:25:13,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2023-11-29 03:25:13,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 47 treesize of output 43 [2023-11-29 03:25:13,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 87 [2023-11-29 03:25:13,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 125 treesize of output 115 [2023-11-29 03:25:13,724 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 50 treesize of output 44 [2023-11-29 03:25:13,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 66 treesize of output 60 [2023-11-29 03:25:13,750 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 72 treesize of output 66 [2023-11-29 03:25:13,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 87 treesize of output 81 [2023-11-29 03:25:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:13,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323239250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:25:13,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:25:13,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 26 [2023-11-29 03:25:13,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189809105] [2023-11-29 03:25:13,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:25:13,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 03:25:13,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:25:13,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 03:25:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2023-11-29 03:25:13,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2023-11-29 03:25:13,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 165 transitions, 1595 flow. Second operand has 27 states, 27 states have (on average 6.777777777777778) internal successors, (183), 27 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:13,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:25:13,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2023-11-29 03:25:13,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:25:18,691 INFO L124 PetriNetUnfolderBase]: 3213/4650 cut-off events. [2023-11-29 03:25:18,691 INFO L125 PetriNetUnfolderBase]: For 26901/26901 co-relation queries the response was YES. [2023-11-29 03:25:18,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23302 conditions, 4650 events. 3213/4650 cut-off events. For 26901/26901 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21270 event pairs, 422 based on Foata normal form. 2/4652 useless extension candidates. Maximal degree in co-relation 22901. Up to 3034 conditions per place. [2023-11-29 03:25:18,735 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 224 selfloop transitions, 174 changer transitions 2/401 dead transitions. [2023-11-29 03:25:18,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 401 transitions, 4238 flow [2023-11-29 03:25:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 03:25:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 03:25:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 411 transitions. [2023-11-29 03:25:18,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3899430740037951 [2023-11-29 03:25:18,740 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 411 transitions. [2023-11-29 03:25:18,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 411 transitions. [2023-11-29 03:25:18,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:25:18,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 411 transitions. [2023-11-29 03:25:18,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 12.088235294117647) internal successors, (411), 34 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:18,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 31.0) internal successors, (1085), 35 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:18,744 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 31.0) internal successors, (1085), 35 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:18,745 INFO L175 Difference]: Start difference. First operand has 116 places, 165 transitions, 1595 flow. Second operand 34 states and 411 transitions. [2023-11-29 03:25:18,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 401 transitions, 4238 flow [2023-11-29 03:25:18,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 401 transitions, 3943 flow, removed 144 selfloop flow, removed 3 redundant places. [2023-11-29 03:25:18,810 INFO L231 Difference]: Finished difference. Result has 157 places, 258 transitions, 2768 flow [2023-11-29 03:25:18,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2768, PETRI_PLACES=157, PETRI_TRANSITIONS=258} [2023-11-29 03:25:18,811 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 124 predicate places. [2023-11-29 03:25:18,811 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 258 transitions, 2768 flow [2023-11-29 03:25:18,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.777777777777778) internal successors, (183), 27 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:25:18,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:25:18,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:25:18,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 03:25:19,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 03:25:19,015 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:25:19,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:25:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1675959973, now seen corresponding path program 6 times [2023-11-29 03:25:19,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:25:19,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735303333] [2023-11-29 03:25:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:25:19,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:25:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:25:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:19,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:25:19,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735303333] [2023-11-29 03:25:19,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735303333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:25:19,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903701948] [2023-11-29 03:25:19,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:25:19,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:25:19,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:25:19,791 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:25:19,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:25:19,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 03:25:19,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:25:19,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 03:25:19,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:25:20,034 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 03:25:20,390 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 66 treesize of output 38 [2023-11-29 03:25:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:25:20,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:25:22,422 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 416 treesize of output 376 [2023-11-29 03:25:22,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:25:22,579 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 691 treesize of output 675 [2023-11-29 03:26:09,320 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-29 03:27:45,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2023-11-29 03:27:45,804 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:45,805 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-29 03:27:45,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 03:27:46,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:27:46,006 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_5725f0eb-b863-44e6-8a3d-0e954d601437/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$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$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) ... 69 more [2023-11-29 03:27:46,009 INFO L158 Benchmark]: Toolchain (without parser) took 506489.37ms. Allocated memory was 144.7MB in the beginning and 436.2MB in the end (delta: 291.5MB). Free memory was 108.5MB in the beginning and 249.6MB in the end (delta: -141.1MB). Peak memory consumption was 309.9MB. Max. memory is 16.1GB. [2023-11-29 03:27:46,009 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 53.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 03:27:46,009 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.46ms. Allocated memory is still 144.7MB. Free memory was 108.5MB in the beginning and 96.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-29 03:27:46,010 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.54ms. Allocated memory is still 144.7MB. Free memory was 95.9MB in the beginning and 93.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 03:27:46,010 INFO L158 Benchmark]: Boogie Preprocessor took 58.29ms. Allocated memory is still 144.7MB. Free memory was 93.8MB in the beginning and 90.5MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 03:27:46,010 INFO L158 Benchmark]: RCFGBuilder took 850.83ms. Allocated memory was 144.7MB in the beginning and 174.1MB in the end (delta: 29.4MB). Free memory was 90.5MB in the beginning and 100.0MB in the end (delta: -9.5MB). Peak memory consumption was 38.7MB. Max. memory is 16.1GB. [2023-11-29 03:27:46,010 INFO L158 Benchmark]: TraceAbstraction took 505258.37ms. Allocated memory was 174.1MB in the beginning and 436.2MB in the end (delta: 262.1MB). Free memory was 99.0MB in the beginning and 249.6MB in the end (delta: -150.6MB). Peak memory consumption was 269.1MB. Max. memory is 16.1GB. [2023-11-29 03:27:46,012 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 53.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 269.46ms. Allocated memory is still 144.7MB. Free memory was 108.5MB in the beginning and 96.4MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.54ms. Allocated memory is still 144.7MB. Free memory was 95.9MB in the beginning and 93.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.29ms. Allocated memory is still 144.7MB. Free memory was 93.8MB in the beginning and 90.5MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 850.83ms. Allocated memory was 144.7MB in the beginning and 174.1MB in the end (delta: 29.4MB). Free memory was 90.5MB in the beginning and 100.0MB in the end (delta: -9.5MB). Peak memory consumption was 38.7MB. Max. memory is 16.1GB. * TraceAbstraction took 505258.37ms. Allocated memory was 174.1MB in the beginning and 436.2MB in the end (delta: 262.1MB). Free memory was 99.0MB in the beginning and 249.6MB in the end (delta: -150.6MB). Peak memory consumption was 269.1MB. 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_5725f0eb-b863-44e6-8a3d-0e954d601437/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_5725f0eb-b863-44e6-8a3d-0e954d601437/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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_5725f0eb-b863-44e6-8a3d-0e954d601437/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 cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:27:47,724 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:27:47,788 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-29 03:27:47,804 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:27:47,805 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:27:47,832 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:27:47,832 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:27:47,833 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:27:47,834 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:27:47,834 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:27:47,835 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:27:47,835 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:27:47,836 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:27:47,837 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:27:47,837 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:27:47,838 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:27:47,838 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:27:47,839 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:27:47,839 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:27:47,840 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:27:47,840 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:27:47,841 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:27:47,841 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:27:47,842 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 03:27:47,842 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 03:27:47,842 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 03:27:47,843 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:27:47,843 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:27:47,844 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:27:47,844 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:27:47,844 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:27:47,845 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:27:47,845 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:27:47,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:27:47,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:27:47,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:27:47,846 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:27:47,847 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 03:27:47,847 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 03:27:47,847 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:27:47,847 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:27:47,848 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:27:47,848 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:27:47,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:27:47,848 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 03:27:47,849 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_5725f0eb-b863-44e6-8a3d-0e954d601437/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e [2023-11-29 03:27:48,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:27:48,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:27:48,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:27:48,177 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:27:48,178 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:27:48,179 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2023-11-29 03:27:51,073 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:27:51,280 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:27:51,280 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2023-11-29 03:27:51,290 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/data/5cf925883/e684dc7f406849d4963dbb5f7ab05663/FLAG3f03279c5 [2023-11-29 03:27:51,306 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/data/5cf925883/e684dc7f406849d4963dbb5f7ab05663 [2023-11-29 03:27:51,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:27:51,311 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:27:51,312 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:27:51,312 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:27:51,316 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:27:51,317 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,318 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aac0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51, skipping insertion in model container [2023-11-29 03:27:51,318 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,346 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:27:51,541 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_5725f0eb-b863-44e6-8a3d-0e954d601437/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2572,2585] [2023-11-29 03:27:51,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:27:51,569 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 03:27:51,574 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:27:51,592 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_5725f0eb-b863-44e6-8a3d-0e954d601437/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2572,2585] [2023-11-29 03:27:51,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:27:51,604 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:27:51,629 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_5725f0eb-b863-44e6-8a3d-0e954d601437/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2572,2585] [2023-11-29 03:27:51,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:27:51,645 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:27:51,645 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:27:51,653 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:27:51,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51 WrapperNode [2023-11-29 03:27:51,654 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:27:51,655 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:27:51,656 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:27:51,656 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:27:51,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,704 INFO L138 Inliner]: procedures = 27, calls = 46, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 227 [2023-11-29 03:27:51,705 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:27:51,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:27:51,706 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:27:51,706 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:27:51,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,723 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,741 INFO L175 MemorySlicer]: Split 16 memory accesses to 5 slices as follows [2, 2, 8, 2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 03:27:51,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,742 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,754 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,759 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,761 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,764 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,768 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:27:51,769 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:27:51,769 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:27:51,770 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:27:51,770 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (1/1) ... [2023-11-29 03:27:51,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:27:51,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:27:51,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:27:51,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:27:51,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:27:51,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 03:27:51,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 03:27:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 03:27:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 03:27:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 03:27:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:27:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 03:27:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 03:27:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 03:27:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 03:27:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 03:27:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 03:27:51,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 03:27:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 03:27:51,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 03:27:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 03:27:51,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 03:27:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 03:27:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 03:27:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 03:27:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:27:51,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:27:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:27:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 03:27:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 03:27:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 03:27:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 03:27:51,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 03:27:51,860 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 03:27:52,007 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:27:52,009 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:27:52,427 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:27:52,828 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:27:52,828 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 03:27:52,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:27:52 BoogieIcfgContainer [2023-11-29 03:27:52,829 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:27:52,832 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:27:52,832 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:27:52,835 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:27:52,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:27:51" (1/3) ... [2023-11-29 03:27:52,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bc8fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:27:52, skipping insertion in model container [2023-11-29 03:27:52,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:27:51" (2/3) ... [2023-11-29 03:27:52,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bc8fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:27:52, skipping insertion in model container [2023-11-29 03:27:52,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:27:52" (3/3) ... [2023-11-29 03:27:52,838 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2023-11-29 03:27:52,848 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 03:27:52,858 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:27:52,858 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 03:27:52,858 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 03:27:52,933 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 03:27:52,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 31 transitions, 83 flow [2023-11-29 03:27:52,996 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-29 03:27:52,997 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 03:27:52,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 4/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-29 03:27:53,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 31 transitions, 83 flow [2023-11-29 03:27:53,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 27 transitions, 72 flow [2023-11-29 03:27:53,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:27:53,020 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;@2e983478, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:27:53,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-29 03:27:53,032 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:27:53,033 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2023-11-29 03:27:53,033 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 03:27:53,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:27:53,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:27:53,034 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:27:53,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:27:53,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1581705799, now seen corresponding path program 1 times [2023-11-29 03:27:53,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:27:53,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526951365] [2023-11-29 03:27:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:27:53,053 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 03:27:53,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:27:53,054 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:53,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:27:53,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:27:53,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:27:53,577 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 03:27:53,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:27:53,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:27:53,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526951365] [2023-11-29 03:27:53,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526951365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:27:53,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:27:53,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:27:53,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836659899] [2023-11-29 03:27:53,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:27:53,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:27:53,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:27:53,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:27:53,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:27:53,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2023-11-29 03:27:53,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:53,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:27:53,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2023-11-29 03:27:53,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:27:53,958 INFO L124 PetriNetUnfolderBase]: 488/729 cut-off events. [2023-11-29 03:27:53,958 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-11-29 03:27:53,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 729 events. 488/729 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2518 event pairs, 138 based on Foata normal form. 1/594 useless extension candidates. Maximal degree in co-relation 1167. Up to 474 conditions per place. [2023-11-29 03:27:53,968 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 39 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2023-11-29 03:27:53,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 213 flow [2023-11-29 03:27:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:27:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:27:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2023-11-29 03:27:53,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6451612903225806 [2023-11-29 03:27:53,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 60 transitions. [2023-11-29 03:27:53,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 60 transitions. [2023-11-29 03:27:53,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:27:53,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 60 transitions. [2023-11-29 03:27:53,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:53,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:53,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:53,990 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 72 flow. Second operand 3 states and 60 transitions. [2023-11-29 03:27:53,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 213 flow [2023-11-29 03:27:53,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 46 transitions, 191 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 03:27:53,998 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 86 flow [2023-11-29 03:27:54,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2023-11-29 03:27:54,004 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-11-29 03:27:54,004 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 86 flow [2023-11-29 03:27:54,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:54,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:27:54,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:27:54,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:54,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:54,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:27:54,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:27:54,207 INFO L85 PathProgramCache]: Analyzing trace with hash 139193438, now seen corresponding path program 1 times [2023-11-29 03:27:54,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:27:54,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95260086] [2023-11-29 03:27:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:27:54,208 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 03:27:54,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:27:54,240 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:54,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:27:54,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:27:54,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:27:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:27:54,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:27:54,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:27:54,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95260086] [2023-11-29 03:27:54,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95260086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:27:54,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:27:54,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:27:54,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524713619] [2023-11-29 03:27:54,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:27:54,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:27:54,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:27:54,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:27:54,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:27:54,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2023-11-29 03:27:54,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:54,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:27:54,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2023-11-29 03:27:54,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:27:55,233 INFO L124 PetriNetUnfolderBase]: 490/734 cut-off events. [2023-11-29 03:27:55,233 INFO L125 PetriNetUnfolderBase]: For 155/155 co-relation queries the response was YES. [2023-11-29 03:27:55,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1763 conditions, 734 events. 490/734 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2645 event pairs, 197 based on Foata normal form. 78/800 useless extension candidates. Maximal degree in co-relation 700. Up to 494 conditions per place. [2023-11-29 03:27:55,240 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 44 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2023-11-29 03:27:55,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 55 transitions, 271 flow [2023-11-29 03:27:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:27:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:27:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2023-11-29 03:27:55,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2023-11-29 03:27:55,242 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 78 transitions. [2023-11-29 03:27:55,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 78 transitions. [2023-11-29 03:27:55,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:27:55,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 78 transitions. [2023-11-29 03:27:55,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:55,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:55,246 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:55,246 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 86 flow. Second operand 6 states and 78 transitions. [2023-11-29 03:27:55,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 55 transitions, 271 flow [2023-11-29 03:27:55,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 55 transitions, 260 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 03:27:55,249 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 135 flow [2023-11-29 03:27:55,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=135, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-11-29 03:27:55,251 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-11-29 03:27:55,251 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 135 flow [2023-11-29 03:27:55,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:55,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:27:55,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:27:55,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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)] Ended with exit code 0 [2023-11-29 03:27:55,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:55,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:27:55,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:27:55,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1566358258, now seen corresponding path program 2 times [2023-11-29 03:27:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:27:55,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537866357] [2023-11-29 03:27:55,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:27:55,454 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 03:27:55,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:27:55,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:55,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:55,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 03:27:55,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:27:55,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 03:27:55,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:27:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:27:55,599 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:27:55,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:27:55,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537866357] [2023-11-29 03:27:55,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537866357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:27:55,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:27:55,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:27:55,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421695346] [2023-11-29 03:27:55,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:27:55,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:27:55,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:27:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:27:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:27:55,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2023-11-29 03:27:55,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:55,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:27:55,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2023-11-29 03:27:55,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:27:55,890 INFO L124 PetriNetUnfolderBase]: 490/737 cut-off events. [2023-11-29 03:27:55,890 INFO L125 PetriNetUnfolderBase]: For 644/644 co-relation queries the response was YES. [2023-11-29 03:27:55,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 737 events. 490/737 cut-off events. For 644/644 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2556 event pairs, 305 based on Foata normal form. 1/722 useless extension candidates. Maximal degree in co-relation 934. Up to 711 conditions per place. [2023-11-29 03:27:55,897 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 32 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-11-29 03:27:55,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 205 flow [2023-11-29 03:27:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:27:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:27:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-29 03:27:55,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2023-11-29 03:27:55,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-29 03:27:55,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-29 03:27:55,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:27:55,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-29 03:27:55,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 03:27:55,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:55,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:55,902 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 135 flow. Second operand 3 states and 42 transitions. [2023-11-29 03:27:55,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 205 flow [2023-11-29 03:27:55,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 194 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 03:27:55,906 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 136 flow [2023-11-29 03:27:55,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-11-29 03:27:55,907 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-11-29 03:27:55,908 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 136 flow [2023-11-29 03:27:55,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:55,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:27:55,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:27:55,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:56,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:56,109 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:27:56,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:27:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1519888742, now seen corresponding path program 1 times [2023-11-29 03:27:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:27:56,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386382222] [2023-11-29 03:27:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:27:56,111 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 03:27:56,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:27:56,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:56,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:27:56,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:27:56,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:27:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:27:56,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:27:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:27:56,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:27:56,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386382222] [2023-11-29 03:27:56,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386382222] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 03:27:56,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:27:56,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-29 03:27:56,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381901104] [2023-11-29 03:27:56,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:27:56,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:27:56,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:27:56,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:27:56,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:27:56,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2023-11-29 03:27:56,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:56,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:27:56,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2023-11-29 03:27:56,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:27:56,998 INFO L124 PetriNetUnfolderBase]: 653/945 cut-off events. [2023-11-29 03:27:56,998 INFO L125 PetriNetUnfolderBase]: For 588/588 co-relation queries the response was YES. [2023-11-29 03:27:57,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2612 conditions, 945 events. 653/945 cut-off events. For 588/588 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3043 event pairs, 201 based on Foata normal form. 40/984 useless extension candidates. Maximal degree in co-relation 2597. Up to 513 conditions per place. [2023-11-29 03:27:57,006 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 44 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2023-11-29 03:27:57,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 289 flow [2023-11-29 03:27:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:27:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:27:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2023-11-29 03:27:57,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2023-11-29 03:27:57,009 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 55 transitions. [2023-11-29 03:27:57,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 55 transitions. [2023-11-29 03:27:57,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:27:57,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 55 transitions. [2023-11-29 03:27:57,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 03:27:57,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 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 03:27:57,011 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 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 03:27:57,012 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 136 flow. Second operand 4 states and 55 transitions. [2023-11-29 03:27:57,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 289 flow [2023-11-29 03:27:57,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 285 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 03:27:57,015 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 161 flow [2023-11-29 03:27:57,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-29 03:27:57,016 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-11-29 03:27:57,017 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 161 flow [2023-11-29 03:27:57,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:27:57,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:27:57,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:27:57,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:57,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:57,218 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:27:57,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:27:57,218 INFO L85 PathProgramCache]: Analyzing trace with hash 8273281, now seen corresponding path program 1 times [2023-11-29 03:27:57,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:27:57,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134897769] [2023-11-29 03:27:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:27:57,219 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 03:27:57,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:27:57,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:57,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:27:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:27:57,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 03:27:57,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:27:58,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:27:58,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:27:58,523 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:27:58,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:27:58,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:27:58,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:27:58,531 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:27:58,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:27:58,534 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:27:58,536 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:27:58,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:27:58,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 246 treesize of output 90 [2023-11-29 03:27:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:27:59,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:28:00,936 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-29 03:28:00,936 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 675 treesize of output 233 [2023-11-29 03:29:28,731 WARN L293 SmtUtils]: Spent 8.34s on a formula simplification that was a NOOP. DAG size: 581 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:29:50,683 WARN L293 SmtUtils]: Spent 7.33s on a formula simplification that was a NOOP. DAG size: 583 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:29:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:29:50,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 03:29:50,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134897769] [2023-11-29 03:29:50,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134897769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:29:50,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 03:29:50,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2023-11-29 03:29:50,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121391671] [2023-11-29 03:29:50,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 03:29:50,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 03:29:50,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 03:29:50,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 03:29:50,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=212, Unknown=5, NotChecked=0, Total=272 [2023-11-29 03:29:55,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:30:00,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:30:00,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2023-11-29 03:30:00,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 161 flow. Second operand has 17 states, 17 states have (on average 6.9411764705882355) internal successors, (118), 17 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:30:00,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:30:00,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2023-11-29 03:30:00,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:30:14,910 WARN L293 SmtUtils]: Spent 7.57s on a formula simplification. DAG size of input: 597 DAG size of output: 249 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:30:17,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:19,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:21,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:30,539 WARN L293 SmtUtils]: Spent 7.39s on a formula simplification. DAG size of input: 595 DAG size of output: 246 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 03:30:33,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:35,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:37,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:40,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:42,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:47,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:48,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:50,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:52,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:54,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:56,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:30:58,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:31:00,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:31:04,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:31:05,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:31:07,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:31:10,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:31:12,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:31:25,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:31:27,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:31:35,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:31:36,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:31:41,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:31:43,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:31:45,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:31:51,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:31:53,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:31:54,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:31:56,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:31:57,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:31:58,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:32:01,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.81s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:32:05,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:32:07,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:32:13,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:32:16,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:32:17,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:32:19,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:32:20,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:32:27,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:32:30,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:32:31,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:32:33,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:32:36,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:32:39,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.51s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:32:41,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:32:42,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:32:46,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 03:32:50,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.01s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:32:53,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:32:53,578 INFO L124 PetriNetUnfolderBase]: 1226/1781 cut-off events. [2023-11-29 03:32:53,579 INFO L125 PetriNetUnfolderBase]: For 1405/1405 co-relation queries the response was YES. [2023-11-29 03:32:53,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5414 conditions, 1781 events. 1226/1781 cut-off events. For 1405/1405 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6923 event pairs, 93 based on Foata normal form. 1/1782 useless extension candidates. Maximal degree in co-relation 4042. Up to 1002 conditions per place. [2023-11-29 03:32:53,591 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 90 selfloop transitions, 25 changer transitions 1/117 dead transitions. [2023-11-29 03:32:53,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 117 transitions, 691 flow [2023-11-29 03:32:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 03:32:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 03:32:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2023-11-29 03:32:53,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053763440860215 [2023-11-29 03:32:53,602 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 141 transitions. [2023-11-29 03:32:53,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 141 transitions. [2023-11-29 03:32:53,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:53,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 141 transitions. [2023-11-29 03:32:53,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:53,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:53,605 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:53,605 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 161 flow. Second operand 9 states and 141 transitions. [2023-11-29 03:32:53,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 117 transitions, 691 flow [2023-11-29 03:32:53,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 117 transitions, 677 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:32:53,611 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 334 flow [2023-11-29 03:32:53,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=334, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-11-29 03:32:53,612 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2023-11-29 03:32:53,613 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 334 flow [2023-11-29 03:32:53,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.9411764705882355) internal successors, (118), 17 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:32:53,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:53,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:53,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:32:53,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:32:53,814 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-29 03:32:53,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:53,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1495834195, now seen corresponding path program 2 times [2023-11-29 03:32:53,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 03:32:53,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419224857] [2023-11-29 03:32:53,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:32:53,815 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 03:32:53,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 03:32:53,816 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:32:53,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5725f0eb-b863-44e6-8a3d-0e954d601437/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 03:32:54,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:32:54,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:32:54,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 03:32:54,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:56,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:32:56,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:32:56,163 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:32:56,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:32:56,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:32:56,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:32:56,178 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:32:56,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 03:32:56,184 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:32:56,185 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 03:32:56,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:32:56,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 246 treesize of output 90 [2023-11-29 03:32:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:56,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:58,615 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-11-29 03:32:58,616 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 675 treesize of output 233 [2023-11-29 03:33:24,027 WARN L293 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 569 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)