./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU --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 93ad3f0e42b4c26a38d8e528f550b89aecdadec634fd1fe3b21f86af4528c655 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:05:44,131 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:05:44,193 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:05:44,197 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:05:44,198 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:05:44,220 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:05:44,220 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:05:44,221 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:05:44,221 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:05:44,222 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:05:44,222 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:05:44,223 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:05:44,223 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:05:44,224 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:05:44,224 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:05:44,225 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:05:44,225 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:05:44,226 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:05:44,226 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:05:44,226 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:05:44,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:05:44,228 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:05:44,228 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:05:44,228 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:05:44,229 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:05:44,229 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:05:44,245 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:05:44,245 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:05:44,246 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:05:44,246 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:05:44,246 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:05:44,247 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:05:44,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:05:44,248 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:05:44,248 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:05:44,248 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:05:44,254 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:05:44,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:05:44,255 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:05:44,256 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:05:44,256 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:05:44,257 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:05:44,258 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_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93ad3f0e42b4c26a38d8e528f550b89aecdadec634fd1fe3b21f86af4528c655 [2024-10-31 22:05:44,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:05:44,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:05:44,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:05:44,623 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:05:44,624 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:05:44,625 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c Unable to find full path for "g++" [2024-10-31 22:05:46,658 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:05:46,849 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:05:46,849 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2024-10-31 22:05:46,859 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/data/6ff7e99ad/316164c09f0746a9b10aa74711cec5b7/FLAGfff9a5375 [2024-10-31 22:05:46,875 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/data/6ff7e99ad/316164c09f0746a9b10aa74711cec5b7 [2024-10-31 22:05:46,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:05:46,879 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:05:46,881 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:05:46,881 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:05:46,889 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:05:46,890 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:05:46" (1/1) ... [2024-10-31 22:05:46,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c5b0a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:46, skipping insertion in model container [2024-10-31 22:05:46,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:05:46" (1/1) ... [2024-10-31 22:05:46,921 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:05:47,121 WARN L251 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_f01117e0-f122-4b4e-88ef-0688aea71380/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c[576,589] [2024-10-31 22:05:47,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:05:47,147 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:05:47,160 WARN L251 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_f01117e0-f122-4b4e-88ef-0688aea71380/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c[576,589] [2024-10-31 22:05:47,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:05:47,187 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:05:47,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47 WrapperNode [2024-10-31 22:05:47,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:05:47,189 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:05:47,189 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:05:47,189 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:05:47,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (1/1) ... [2024-10-31 22:05:47,206 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (1/1) ... [2024-10-31 22:05:47,225 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2024-10-31 22:05:47,226 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:05:47,227 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:05:47,227 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:05:47,227 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:05:47,239 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (1/1) ... [2024-10-31 22:05:47,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (1/1) ... [2024-10-31 22:05:47,243 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (1/1) ... [2024-10-31 22:05:47,257 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 22:05:47,257 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (1/1) ... [2024-10-31 22:05:47,258 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (1/1) ... [2024-10-31 22:05:47,261 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (1/1) ... [2024-10-31 22:05:47,265 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (1/1) ... [2024-10-31 22:05:47,266 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (1/1) ... [2024-10-31 22:05:47,267 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (1/1) ... [2024-10-31 22:05:47,269 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:05:47,270 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:05:47,270 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:05:47,270 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:05:47,271 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (1/1) ... [2024-10-31 22:05:47,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:05:47,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:47,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:05:47,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:05:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:05:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:05:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:05:47,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:05:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 22:05:47,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 22:05:47,391 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:05:47,393 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:05:47,551 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-31 22:05:47,551 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:05:47,571 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:05:47,571 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:05:47,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:05:47 BoogieIcfgContainer [2024-10-31 22:05:47,572 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:05:47,574 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:05:47,576 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:05:47,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:05:47,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:05:46" (1/3) ... [2024-10-31 22:05:47,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d45556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:05:47, skipping insertion in model container [2024-10-31 22:05:47,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:05:47" (2/3) ... [2024-10-31 22:05:47,585 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d45556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:05:47, skipping insertion in model container [2024-10-31 22:05:47,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:05:47" (3/3) ... [2024-10-31 22:05:47,586 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound20.c [2024-10-31 22:05:47,608 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:05:47,609 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:05:47,695 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:05:47,703 INFO L333 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, 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;@2d8dcf3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:05:47,703 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:05:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-31 22:05:47,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-31 22:05:47,720 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:47,721 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:47,722 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:05:47,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:47,730 INFO L85 PathProgramCache]: Analyzing trace with hash -555122024, now seen corresponding path program 1 times [2024-10-31 22:05:47,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:47,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84589944] [2024-10-31 22:05:47,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:47,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:47,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:47,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84589944] [2024-10-31 22:05:47,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84589944] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:47,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:47,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:05:47,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279527000] [2024-10-31 22:05:47,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:47,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:05:47,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:47,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:05:47,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:05:47,960 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:47,980 INFO L93 Difference]: Finished difference Result 55 states and 87 transitions. [2024-10-31 22:05:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:05:47,982 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-31 22:05:47,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:47,988 INFO L225 Difference]: With dead ends: 55 [2024-10-31 22:05:47,988 INFO L226 Difference]: Without dead ends: 25 [2024-10-31 22:05:47,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:05:47,995 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:47,996 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:05:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-31 22:05:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-31 22:05:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:05:48,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2024-10-31 22:05:48,038 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 9 [2024-10-31 22:05:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:48,039 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2024-10-31 22:05:48,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2024-10-31 22:05:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-31 22:05:48,041 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:48,041 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:48,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:05:48,042 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:05:48,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1985514477, now seen corresponding path program 1 times [2024-10-31 22:05:48,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:48,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124222321] [2024-10-31 22:05:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:48,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:48,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:48,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124222321] [2024-10-31 22:05:48,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124222321] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:48,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:48,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:05:48,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58416789] [2024-10-31 22:05:48,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:48,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:05:48,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:48,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:05:48,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:05:48,168 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:48,194 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-10-31 22:05:48,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:05:48,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-31 22:05:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:48,200 INFO L225 Difference]: With dead ends: 34 [2024-10-31 22:05:48,200 INFO L226 Difference]: Without dead ends: 27 [2024-10-31 22:05:48,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:05:48,201 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:48,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:05:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-31 22:05:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-31 22:05:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:05:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-10-31 22:05:48,223 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 10 [2024-10-31 22:05:48,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:48,226 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-10-31 22:05:48,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:48,226 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-10-31 22:05:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-31 22:05:48,227 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:48,227 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:48,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:05:48,228 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:05:48,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:48,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1984024927, now seen corresponding path program 1 times [2024-10-31 22:05:48,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:48,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950413216] [2024-10-31 22:05:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:48,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:05:48,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800200860] [2024-10-31 22:05:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:48,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:48,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:48,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:05:48,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:05:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:48,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:05:48,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:05:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:48,495 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:05:48,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:48,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950413216] [2024-10-31 22:05:48,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:05:48,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800200860] [2024-10-31 22:05:48,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800200860] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:48,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:48,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:05:48,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174376392] [2024-10-31 22:05:48,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:48,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:05:48,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:48,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:05:48,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:05:48,499 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:48,564 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2024-10-31 22:05:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:05:48,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-31 22:05:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:48,566 INFO L225 Difference]: With dead ends: 37 [2024-10-31 22:05:48,566 INFO L226 Difference]: Without dead ends: 35 [2024-10-31 22:05:48,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:05:48,568 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:48,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 111 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:05:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-31 22:05:48,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-10-31 22:05:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-31 22:05:48,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-10-31 22:05:48,578 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 10 [2024-10-31 22:05:48,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:48,579 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-10-31 22:05:48,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:48,579 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-10-31 22:05:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-31 22:05:48,580 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:48,580 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:48,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:05:48,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:48,785 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:05:48,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2084809189, now seen corresponding path program 1 times [2024-10-31 22:05:48,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:48,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598465033] [2024-10-31 22:05:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:48,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:05:48,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065744594] [2024-10-31 22:05:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:48,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:48,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:48,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:05:48,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:05:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:48,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:05:48,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:05:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:05:48,958 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:05:48,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:48,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598465033] [2024-10-31 22:05:48,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:05:48,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065744594] [2024-10-31 22:05:48,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065744594] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:48,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:48,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:05:48,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311290675] [2024-10-31 22:05:48,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:48,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:05:48,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:48,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:05:48,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:05:48,962 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 22:05:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:49,047 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2024-10-31 22:05:49,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:05:49,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-10-31 22:05:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:49,049 INFO L225 Difference]: With dead ends: 50 [2024-10-31 22:05:49,049 INFO L226 Difference]: Without dead ends: 47 [2024-10-31 22:05:49,049 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:05:49,050 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:49,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:05:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-31 22:05:49,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-10-31 22:05:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-31 22:05:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-10-31 22:05:49,074 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 15 [2024-10-31 22:05:49,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:49,074 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-10-31 22:05:49,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 22:05:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-10-31 22:05:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-31 22:05:49,076 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:49,076 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:49,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:05:49,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:49,277 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:05:49,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:49,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2002825724, now seen corresponding path program 1 times [2024-10-31 22:05:49,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:49,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424295768] [2024-10-31 22:05:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:49,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:05:49,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345237080] [2024-10-31 22:05:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:49,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:49,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:49,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:05:49,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:05:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:49,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:05:49,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:05:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:05:49,453 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:05:49,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:49,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424295768] [2024-10-31 22:05:49,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:05:49,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345237080] [2024-10-31 22:05:49,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345237080] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:49,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:49,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:05:49,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603155304] [2024-10-31 22:05:49,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:49,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:05:49,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:05:49,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:05:49,456 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:05:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:49,554 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2024-10-31 22:05:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:05:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-10-31 22:05:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:49,560 INFO L225 Difference]: With dead ends: 75 [2024-10-31 22:05:49,560 INFO L226 Difference]: Without dead ends: 73 [2024-10-31 22:05:49,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:05:49,561 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:49,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 117 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:05:49,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-31 22:05:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2024-10-31 22:05:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 43 states have internal predecessors, (53), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-10-31 22:05:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 92 transitions. [2024-10-31 22:05:49,591 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 92 transitions. Word has length 23 [2024-10-31 22:05:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:49,594 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 92 transitions. [2024-10-31 22:05:49,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:05:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 92 transitions. [2024-10-31 22:05:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-31 22:05:49,595 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:49,595 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:49,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:05:49,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:49,796 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:05:49,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:49,796 INFO L85 PathProgramCache]: Analyzing trace with hash -840648207, now seen corresponding path program 1 times [2024-10-31 22:05:49,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:49,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446097757] [2024-10-31 22:05:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:49,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:49,979 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 22:05:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:49,988 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:05:49,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:05:50,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:50,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446097757] [2024-10-31 22:05:50,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446097757] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:50,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:50,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:05:50,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565616781] [2024-10-31 22:05:50,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:50,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:05:50,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:50,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:05:50,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:05:50,005 INFO L87 Difference]: Start difference. First operand 66 states and 92 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:05:50,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:50,072 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-10-31 22:05:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:05:50,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2024-10-31 22:05:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:50,075 INFO L225 Difference]: With dead ends: 105 [2024-10-31 22:05:50,075 INFO L226 Difference]: Without dead ends: 70 [2024-10-31 22:05:50,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:05:50,080 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:50,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 92 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:05:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-31 22:05:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-10-31 22:05:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-10-31 22:05:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-10-31 22:05:50,106 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 26 [2024-10-31 22:05:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:50,106 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-10-31 22:05:50,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 22:05:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-10-31 22:05:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-31 22:05:50,107 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:50,111 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:50,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:05:50,112 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:05:50,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:50,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2012484164, now seen corresponding path program 1 times [2024-10-31 22:05:50,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:50,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793870498] [2024-10-31 22:05:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:50,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:50,429 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 22:05:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:50,440 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:05:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:50,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-31 22:05:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:50,466 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:05:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 22:05:50,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:50,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793870498] [2024-10-31 22:05:50,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793870498] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:50,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:05:50,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 22:05:50,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457750628] [2024-10-31 22:05:50,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:50,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:05:50,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:05:50,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:05:50,480 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:05:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:50,593 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2024-10-31 22:05:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:05:50,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-10-31 22:05:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:50,595 INFO L225 Difference]: With dead ends: 76 [2024-10-31 22:05:50,595 INFO L226 Difference]: Without dead ends: 74 [2024-10-31 22:05:50,596 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:05:50,597 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:50,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 108 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:05:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-31 22:05:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-10-31 22:05:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-10-31 22:05:50,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-10-31 22:05:50,616 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 33 [2024-10-31 22:05:50,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:50,617 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-10-31 22:05:50,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 22:05:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-10-31 22:05:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 22:05:50,618 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:50,619 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:50,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:05:50,619 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:05:50,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2020901362, now seen corresponding path program 1 times [2024-10-31 22:05:50,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:50,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191797000] [2024-10-31 22:05:50,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:50,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:50,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 22:05:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:50,860 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:05:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:50,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-31 22:05:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:50,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:05:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:50,900 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-31 22:05:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-31 22:05:50,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:50,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191797000] [2024-10-31 22:05:50,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191797000] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:05:50,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888893516] [2024-10-31 22:05:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:50,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:50,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:50,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:05:50,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:05:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:50,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:05:50,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:05:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-31 22:05:51,125 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:05:51,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888893516] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:05:51,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:05:51,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-10-31 22:05:51,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873159285] [2024-10-31 22:05:51,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:51,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:05:51,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:51,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:05:51,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:05:51,131 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:05:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:51,293 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2024-10-31 22:05:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:05:51,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-10-31 22:05:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:51,299 INFO L225 Difference]: With dead ends: 87 [2024-10-31 22:05:51,299 INFO L226 Difference]: Without dead ends: 85 [2024-10-31 22:05:51,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:05:51,301 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:51,302 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 155 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:05:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-31 22:05:51,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2024-10-31 22:05:51,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.22) internal successors, (61), 54 states have internal predecessors, (61), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2024-10-31 22:05:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2024-10-31 22:05:51,332 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 39 [2024-10-31 22:05:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:51,333 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2024-10-31 22:05:51,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 22:05:51,333 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2024-10-31 22:05:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-31 22:05:51,337 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:51,337 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:51,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:05:51,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 22:05:51,538 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:05:51,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:51,539 INFO L85 PathProgramCache]: Analyzing trace with hash 803844641, now seen corresponding path program 1 times [2024-10-31 22:05:51,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:51,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104892252] [2024-10-31 22:05:51,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:51,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:51,639 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 22:05:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:51,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:05:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:51,649 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-31 22:05:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:51,654 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:05:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:51,663 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-31 22:05:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-31 22:05:51,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:51,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104892252] [2024-10-31 22:05:51,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104892252] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:05:51,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879302180] [2024-10-31 22:05:51,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:51,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:51,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:51,674 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:05:51,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:05:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:51,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:05:51,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:05:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:05:51,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:05:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-31 22:05:51,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879302180] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:05:51,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:05:51,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-10-31 22:05:51,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430976328] [2024-10-31 22:05:51,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:05:51,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:05:51,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:51,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:05:51,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:05:51,979 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-10-31 22:05:52,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:52,268 INFO L93 Difference]: Finished difference Result 247 states and 304 transitions. [2024-10-31 22:05:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:05:52,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 42 [2024-10-31 22:05:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:52,271 INFO L225 Difference]: With dead ends: 247 [2024-10-31 22:05:52,271 INFO L226 Difference]: Without dead ends: 240 [2024-10-31 22:05:52,272 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:05:52,273 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 85 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:52,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 176 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:05:52,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-10-31 22:05:52,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2024-10-31 22:05:52,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 153 states have internal predecessors, (173), 55 states have call successors, (55), 24 states have call predecessors, (55), 24 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2024-10-31 22:05:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 279 transitions. [2024-10-31 22:05:52,324 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 279 transitions. Word has length 42 [2024-10-31 22:05:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:52,325 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 279 transitions. [2024-10-31 22:05:52,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-10-31 22:05:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 279 transitions. [2024-10-31 22:05:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-31 22:05:52,329 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:52,329 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:52,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 22:05:52,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-31 22:05:52,533 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:05:52,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:52,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1528082637, now seen corresponding path program 1 times [2024-10-31 22:05:52,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:52,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916682301] [2024-10-31 22:05:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:52,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:05:52,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722472505] [2024-10-31 22:05:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:52,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:52,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:52,570 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:05:52,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:05:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:52,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 22:05:52,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:05:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-31 22:05:53,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:05:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-31 22:05:53,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:53,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916682301] [2024-10-31 22:05:53,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:05:53,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722472505] [2024-10-31 22:05:53,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722472505] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:05:53,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:05:53,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2024-10-31 22:05:53,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600979815] [2024-10-31 22:05:53,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:05:53,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:05:53,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:05:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:05:53,340 INFO L87 Difference]: Start difference. First operand 224 states and 279 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 22:05:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:53,557 INFO L93 Difference]: Finished difference Result 242 states and 296 transitions. [2024-10-31 22:05:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:05:53,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-10-31 22:05:53,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:53,561 INFO L225 Difference]: With dead ends: 242 [2024-10-31 22:05:53,561 INFO L226 Difference]: Without dead ends: 236 [2024-10-31 22:05:53,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:05:53,565 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:53,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 95 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:05:53,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-10-31 22:05:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2024-10-31 22:05:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 112 states have (on average 1.1339285714285714) internal successors, (127), 117 states have internal predecessors, (127), 36 states have call successors, (36), 22 states have call predecessors, (36), 22 states have return successors, (36), 31 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-31 22:05:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 199 transitions. [2024-10-31 22:05:53,622 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 199 transitions. Word has length 47 [2024-10-31 22:05:53,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:53,622 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 199 transitions. [2024-10-31 22:05:53,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 22:05:53,622 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 199 transitions. [2024-10-31 22:05:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-31 22:05:53,624 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:05:53,624 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:53,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:05:53,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:05:53,825 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:05:53,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:05:53,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1339763981, now seen corresponding path program 1 times [2024-10-31 22:05:53,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:05:53,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962034223] [2024-10-31 22:05:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:53,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:05:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:53,978 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 22:05:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:53,981 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 22:05:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:53,984 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-31 22:05:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:53,987 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:05:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:53,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-31 22:05:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:53,993 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-31 22:05:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:53,995 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-31 22:05:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:54,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-31 22:05:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:54,021 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-31 22:05:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-10-31 22:05:54,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:05:54,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962034223] [2024-10-31 22:05:54,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962034223] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:05:54,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6336639] [2024-10-31 22:05:54,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:05:54,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:05:54,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:05:54,029 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:05:54,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:05:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:05:54,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:05:54,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:05:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-10-31 22:05:54,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:05:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-10-31 22:05:54,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6336639] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:05:54,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:05:54,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2024-10-31 22:05:54,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917378822] [2024-10-31 22:05:54,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:05:54,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:05:54,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:05:54,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:05:54,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:05:54,313 INFO L87 Difference]: Start difference. First operand 171 states and 199 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-31 22:05:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:05:54,492 INFO L93 Difference]: Finished difference Result 183 states and 208 transitions. [2024-10-31 22:05:54,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:05:54,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 63 [2024-10-31 22:05:54,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:05:54,493 INFO L225 Difference]: With dead ends: 183 [2024-10-31 22:05:54,493 INFO L226 Difference]: Without dead ends: 0 [2024-10-31 22:05:54,494 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:05:54,495 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:05:54,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 84 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:05:54,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-31 22:05:54,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-31 22:05:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:05:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-31 22:05:54,497 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2024-10-31 22:05:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:05:54,497 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-31 22:05:54,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-31 22:05:54,497 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-31 22:05:54,497 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-31 22:05:54,500 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-31 22:05:54,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 22:05:54,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:05:54,713 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:05:54,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-31 22:05:56,403 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-10-31 22:05:56,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.10 10:05:56 BoogieIcfgContainer [2024-10-31 22:05:56,428 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-31 22:05:56,429 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-31 22:05:56,429 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-31 22:05:56,429 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-31 22:05:56,429 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:05:47" (3/4) ... [2024-10-31 22:05:56,432 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-10-31 22:05:56,437 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-10-31 22:05:56,441 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2024-10-31 22:05:56,441 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-10-31 22:05:56,442 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-10-31 22:05:56,442 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-31 22:05:56,532 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/witness.graphml [2024-10-31 22:05:56,533 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/witness.yml [2024-10-31 22:05:56,533 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-31 22:05:56,533 INFO L158 Benchmark]: Toolchain (without parser) took 9654.15ms. Allocated memory was 127.9MB in the beginning and 192.9MB in the end (delta: 65.0MB). Free memory was 93.4MB in the beginning and 80.8MB in the end (delta: 12.6MB). Peak memory consumption was 79.1MB. Max. memory is 16.1GB. [2024-10-31 22:05:56,534 INFO L158 Benchmark]: CDTParser took 1.05ms. Allocated memory is still 127.9MB. Free memory is still 99.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-31 22:05:56,534 INFO L158 Benchmark]: CACSL2BoogieTranslator took 307.02ms. Allocated memory is still 127.9MB. Free memory was 93.1MB in the beginning and 80.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-31 22:05:56,535 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.11ms. Allocated memory is still 127.9MB. Free memory was 80.5MB in the beginning and 78.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-31 22:05:56,535 INFO L158 Benchmark]: Boogie Preprocessor took 42.30ms. Allocated memory is still 127.9MB. Free memory was 78.8MB in the beginning and 77.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-31 22:05:56,535 INFO L158 Benchmark]: RCFGBuilder took 302.17ms. Allocated memory is still 127.9MB. Free memory was 77.2MB in the beginning and 65.8MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-31 22:05:56,536 INFO L158 Benchmark]: TraceAbstraction took 8853.92ms. Allocated memory was 127.9MB in the beginning and 192.9MB in the end (delta: 65.0MB). Free memory was 65.0MB in the beginning and 85.0MB in the end (delta: -20.0MB). Peak memory consumption was 58.1MB. Max. memory is 16.1GB. [2024-10-31 22:05:56,536 INFO L158 Benchmark]: Witness Printer took 104.33ms. Allocated memory is still 192.9MB. Free memory was 85.0MB in the beginning and 80.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-31 22:05:56,538 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.05ms. Allocated memory is still 127.9MB. Free memory is still 99.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 307.02ms. Allocated memory is still 127.9MB. Free memory was 93.1MB in the beginning and 80.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.11ms. Allocated memory is still 127.9MB. Free memory was 80.5MB in the beginning and 78.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.30ms. Allocated memory is still 127.9MB. Free memory was 78.8MB in the beginning and 77.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 302.17ms. Allocated memory is still 127.9MB. Free memory was 77.2MB in the beginning and 65.8MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 8853.92ms. Allocated memory was 127.9MB in the beginning and 192.9MB in the end (delta: 65.0MB). Free memory was 65.0MB in the beginning and 85.0MB in the end (delta: -20.0MB). Peak memory consumption was 58.1MB. Max. memory is 16.1GB. * Witness Printer took 104.33ms. Allocated memory is still 192.9MB. Free memory was 85.0MB in the beginning and 80.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.0s, OverallIterations: 11, TraceHistogramMax: 10, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 210 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 190 mSDsluCounter, 1165 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 837 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 482 IncrementalHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 328 mSDtfsCounter, 482 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 484 GetRequests, 406 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=224occurred in iteration=9, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 97 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 556 NumberOfCodeBlocks, 556 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 596 ConstructedInterpolants, 0 QuantifiedInterpolants, 1574 SizeOfPredicates, 13 NumberOfNonLiveVariables, 712 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 17 InterpolantComputations, 9 PerfectInterpolantSequences, 905/967 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: ((((((__int128) a * y) == b) && (1 <= y)) && (1 <= r)) && (((__int128) b + x) == ((((__int128) a * y) + r) + ((__int128) q * y)))) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((x == (r + ((__int128) q * y))) && (1 <= y)) && (((__int128) b + x) == ((((__int128) a * y) + r) + ((__int128) q * y)))) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: ((cond != 0) && (counter == \old(counter))) RESULT: Ultimate proved your program to be correct! [2024-10-31 22:05:56,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f01117e0-f122-4b4e-88ef-0688aea71380/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE