./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd --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 c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:45:34,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:45:34,177 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 12:45:34,185 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:45:34,186 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:45:34,222 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:45:34,223 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:45:34,223 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:45:34,224 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:45:34,224 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:45:34,224 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:45:34,224 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:45:34,225 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:45:34,225 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:45:34,225 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:45:34,225 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:45:34,225 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 12:45:34,225 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 12:45:34,225 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 12:45:34,225 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 12:45:34,226 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:45:34,226 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 12:45:34,226 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:45:34,226 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 12:45:34,226 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:45:34,226 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 12:45:34,226 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 12:45:34,226 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:45:34,226 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:45:34,226 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:45:34,226 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:45:34,227 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:45:34,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:45:34,227 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:45:34,227 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:45:34,227 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 12:45:34,227 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 12:45:34,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 12:45:34,227 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:45:34,227 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:45:34,227 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:45:34,227 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:45:34,228 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd 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 -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2024-11-13 12:45:34,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:45:34,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:45:34,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:45:34,549 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:45:34,549 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:45:34,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c Unable to find full path for "g++" [2024-11-13 12:45:36,460 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:45:36,769 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:45:36,771 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2024-11-13 12:45:36,784 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/data/48db719ae/e6dcb0022e7f424fb2417ca0283997c0/FLAGe830c132f [2024-11-13 12:45:37,029 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/data/48db719ae/e6dcb0022e7f424fb2417ca0283997c0 [2024-11-13 12:45:37,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:45:37,034 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:45:37,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:45:37,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:45:37,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:45:37,041 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@607e8230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37, skipping insertion in model container [2024-11-13 12:45:37,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,073 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:45:37,237 WARN L250 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_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2024-11-13 12:45:37,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:45:37,341 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:45:37,351 WARN L250 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_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2024-11-13 12:45:37,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:45:37,406 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:45:37,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37 WrapperNode [2024-11-13 12:45:37,407 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:45:37,408 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:45:37,408 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:45:37,409 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:45:37,415 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,427 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,463 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 190 [2024-11-13 12:45:37,463 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:45:37,464 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:45:37,464 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:45:37,464 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:45:37,473 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,475 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,498 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]. [2024-11-13 12:45:37,498 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,498 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,503 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,508 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,509 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,510 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,513 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:45:37,513 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:45:37,513 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:45:37,514 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:45:37,514 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (1/1) ... [2024-11-13 12:45:37,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:45:37,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:37,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 12:45:37,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 12:45:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 12:45:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 12:45:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-13 12:45:37,577 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-13 12:45:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:45:37,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:45:37,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 12:45:37,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 12:45:37,655 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:45:37,657 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:45:38,117 INFO L? ?]: Removed 73 outVars from TransFormulas that were not future-live. [2024-11-13 12:45:38,117 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:45:38,133 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:45:38,133 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 12:45:38,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:45:38 BoogieIcfgContainer [2024-11-13 12:45:38,134 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:45:38,138 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:45:38,138 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:45:38,143 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:45:38,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:45:37" (1/3) ... [2024-11-13 12:45:38,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251c4ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:45:38, skipping insertion in model container [2024-11-13 12:45:38,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:37" (2/3) ... [2024-11-13 12:45:38,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251c4ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:45:38, skipping insertion in model container [2024-11-13 12:45:38,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:45:38" (3/3) ... [2024-11-13 12:45:38,146 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2024-11-13 12:45:38,164 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:45:38,166 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_1-2a.c.cil.c that has 3 procedures, 96 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-13 12:45:38,236 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 12:45:38,249 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;@2be72fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:45:38,249 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 12:45:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 84 states have (on average 1.5833333333333333) internal successors, (133), 87 states have internal predecessors, (133), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 12:45:38,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 12:45:38,264 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:38,265 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:38,266 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:38,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2025827523, now seen corresponding path program 1 times [2024-11-13 12:45:38,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:38,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080299040] [2024-11-13 12:45:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:38,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:39,037 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:39,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:39,124 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:39,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:39,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080299040] [2024-11-13 12:45:39,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080299040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:39,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659543949] [2024-11-13 12:45:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:39,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:39,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:39,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:39,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 12:45:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:39,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 12:45:39,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:39,367 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:45:39,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659543949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:39,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:45:39,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 10 [2024-11-13 12:45:39,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036530622] [2024-11-13 12:45:39,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:39,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:45:39,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:39,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:45:39,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-13 12:45:39,401 INFO L87 Difference]: Start difference. First operand has 96 states, 84 states have (on average 1.5833333333333333) internal successors, (133), 87 states have internal predecessors, (133), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:39,685 INFO L93 Difference]: Finished difference Result 225 states and 365 transitions. [2024-11-13 12:45:39,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:45:39,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2024-11-13 12:45:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:39,699 INFO L225 Difference]: With dead ends: 225 [2024-11-13 12:45:39,700 INFO L226 Difference]: Without dead ends: 126 [2024-11-13 12:45:39,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:45:39,714 INFO L432 NwaCegarLoop]: 128 mSDtfsCounter, 39 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:39,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 753 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:45:39,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-13 12:45:39,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2024-11-13 12:45:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 113 states have internal predecessors, (162), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-13 12:45:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 184 transitions. [2024-11-13 12:45:39,818 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 184 transitions. Word has length 36 [2024-11-13 12:45:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:39,820 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 184 transitions. [2024-11-13 12:45:39,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 184 transitions. [2024-11-13 12:45:39,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 12:45:39,826 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:39,826 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:39,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 12:45:40,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-13 12:45:40,027 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:40,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:40,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1136942330, now seen corresponding path program 1 times [2024-11-13 12:45:40,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:40,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694932659] [2024-11-13 12:45:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:40,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,124 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,129 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,132 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:40,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:40,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694932659] [2024-11-13 12:45:40,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694932659] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:40,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:40,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:45:40,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427485540] [2024-11-13 12:45:40,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:40,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:45:40,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:40,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:45:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:45:40,139 INFO L87 Difference]: Start difference. First operand 124 states and 184 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:40,179 INFO L93 Difference]: Finished difference Result 212 states and 316 transitions. [2024-11-13 12:45:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:45:40,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2024-11-13 12:45:40,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:40,182 INFO L225 Difference]: With dead ends: 212 [2024-11-13 12:45:40,184 INFO L226 Difference]: Without dead ends: 170 [2024-11-13 12:45:40,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:45:40,185 INFO L432 NwaCegarLoop]: 134 mSDtfsCounter, 41 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:40,186 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 263 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-13 12:45:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-11-13 12:45:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 154 states have (on average 1.4350649350649352) internal successors, (221), 157 states have internal predecessors, (221), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2024-11-13 12:45:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 247 transitions. [2024-11-13 12:45:40,206 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 247 transitions. Word has length 37 [2024-11-13 12:45:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:40,206 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 247 transitions. [2024-11-13 12:45:40,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 247 transitions. [2024-11-13 12:45:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 12:45:40,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:40,208 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:40,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 12:45:40,208 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:40,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:40,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1320244249, now seen corresponding path program 1 times [2024-11-13 12:45:40,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:40,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306967789] [2024-11-13 12:45:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:40,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,298 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,304 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:40,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:40,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306967789] [2024-11-13 12:45:40,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306967789] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:40,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:40,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:45:40,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95081537] [2024-11-13 12:45:40,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:40,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:45:40,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:40,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:45:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:45:40,312 INFO L87 Difference]: Start difference. First operand 170 states and 247 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:40,351 INFO L93 Difference]: Finished difference Result 308 states and 449 transitions. [2024-11-13 12:45:40,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:45:40,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-13 12:45:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:40,353 INFO L225 Difference]: With dead ends: 308 [2024-11-13 12:45:40,356 INFO L226 Difference]: Without dead ends: 250 [2024-11-13 12:45:40,357 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:45:40,358 INFO L432 NwaCegarLoop]: 143 mSDtfsCounter, 53 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:40,358 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 273 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-13 12:45:40,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 236. [2024-11-13 12:45:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 216 states have (on average 1.4027777777777777) internal successors, (303), 220 states have internal predecessors, (303), 16 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 15 states have call predecessors, (17), 14 states have call successors, (17) [2024-11-13 12:45:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 336 transitions. [2024-11-13 12:45:40,393 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 336 transitions. Word has length 39 [2024-11-13 12:45:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:40,396 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 336 transitions. [2024-11-13 12:45:40,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:40,397 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 336 transitions. [2024-11-13 12:45:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 12:45:40,399 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:40,399 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:40,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 12:45:40,399 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:40,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:40,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1003754090, now seen corresponding path program 1 times [2024-11-13 12:45:40,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:40,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811252360] [2024-11-13 12:45:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:40,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:40,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:40,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811252360] [2024-11-13 12:45:40,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811252360] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:40,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:40,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:45:40,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456848129] [2024-11-13 12:45:40,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:40,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:45:40,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:45:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:40,523 INFO L87 Difference]: Start difference. First operand 236 states and 336 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:40,564 INFO L93 Difference]: Finished difference Result 370 states and 530 transitions. [2024-11-13 12:45:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:45:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-13 12:45:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:40,568 INFO L225 Difference]: With dead ends: 370 [2024-11-13 12:45:40,569 INFO L226 Difference]: Without dead ends: 326 [2024-11-13 12:45:40,571 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:40,573 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 53 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:40,574 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 498 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:40,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-13 12:45:40,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 300. [2024-11-13 12:45:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 274 states have (on average 1.4014598540145986) internal successors, (384), 280 states have internal predecessors, (384), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 21 states have call predecessors, (23), 20 states have call successors, (23) [2024-11-13 12:45:40,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 429 transitions. [2024-11-13 12:45:40,607 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 429 transitions. Word has length 40 [2024-11-13 12:45:40,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:40,607 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 429 transitions. [2024-11-13 12:45:40,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:40,608 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 429 transitions. [2024-11-13 12:45:40,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 12:45:40,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:40,613 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:40,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 12:45:40,617 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:40,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:40,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2024822444, now seen corresponding path program 1 times [2024-11-13 12:45:40,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:40,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949413494] [2024-11-13 12:45:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:40,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,683 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:40,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:40,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949413494] [2024-11-13 12:45:40,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949413494] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:40,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:40,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:45:40,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691922539] [2024-11-13 12:45:40,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:40,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:45:40,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:40,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:45:40,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:45:40,692 INFO L87 Difference]: Start difference. First operand 300 states and 429 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:40,713 INFO L93 Difference]: Finished difference Result 309 states and 439 transitions. [2024-11-13 12:45:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:45:40,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-13 12:45:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:40,716 INFO L225 Difference]: With dead ends: 309 [2024-11-13 12:45:40,716 INFO L226 Difference]: Without dead ends: 302 [2024-11-13 12:45:40,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:45:40,718 INFO L432 NwaCegarLoop]: 135 mSDtfsCounter, 0 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:40,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 266 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:40,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-11-13 12:45:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2024-11-13 12:45:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 276 states have (on average 1.3985507246376812) internal successors, (386), 282 states have internal predecessors, (386), 22 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 21 states have call predecessors, (23), 20 states have call successors, (23) [2024-11-13 12:45:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 431 transitions. [2024-11-13 12:45:40,757 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 431 transitions. Word has length 40 [2024-11-13 12:45:40,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:40,757 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 431 transitions. [2024-11-13 12:45:40,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 431 transitions. [2024-11-13 12:45:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 12:45:40,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:40,761 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-11-13 12:45:40,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 12:45:40,761 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:40,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:40,762 INFO L85 PathProgramCache]: Analyzing trace with hash -154264851, now seen corresponding path program 1 times [2024-11-13 12:45:40,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:40,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773825043] [2024-11-13 12:45:40,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:40,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,953 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,991 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:40,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:40,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773825043] [2024-11-13 12:45:40,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773825043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:40,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489045071] [2024-11-13 12:45:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:40,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:41,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:41,002 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:41,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 12:45:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 12:45:41,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:41,154 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:45:41,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489045071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:41,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:45:41,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-11-13 12:45:41,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103049010] [2024-11-13 12:45:41,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:41,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:45:41,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:41,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:45:41,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:45:41,156 INFO L87 Difference]: Start difference. First operand 302 states and 431 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:41,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:41,270 INFO L93 Difference]: Finished difference Result 525 states and 758 transitions. [2024-11-13 12:45:41,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:45:41,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-13 12:45:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:41,275 INFO L225 Difference]: With dead ends: 525 [2024-11-13 12:45:41,275 INFO L226 Difference]: Without dead ends: 444 [2024-11-13 12:45:41,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:45:41,276 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 73 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:41,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 805 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:45:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2024-11-13 12:45:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 443. [2024-11-13 12:45:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 406 states have (on average 1.4064039408866995) internal successors, (571), 414 states have internal predecessors, (571), 32 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (36), 32 states have call predecessors, (36), 30 states have call successors, (36) [2024-11-13 12:45:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 639 transitions. [2024-11-13 12:45:41,305 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 639 transitions. Word has length 40 [2024-11-13 12:45:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:41,306 INFO L471 AbstractCegarLoop]: Abstraction has 443 states and 639 transitions. [2024-11-13 12:45:41,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 639 transitions. [2024-11-13 12:45:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 12:45:41,307 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:41,307 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:41,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 12:45:41,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:41,512 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:41,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:41,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2029194008, now seen corresponding path program 1 times [2024-11-13 12:45:41,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:41,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023698382] [2024-11-13 12:45:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:41,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,573 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,580 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:41,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:41,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023698382] [2024-11-13 12:45:41,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023698382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:41,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:41,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:45:41,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135019982] [2024-11-13 12:45:41,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:41,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:45:41,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:41,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:45:41,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:41,585 INFO L87 Difference]: Start difference. First operand 443 states and 639 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:41,617 INFO L93 Difference]: Finished difference Result 744 states and 1082 transitions. [2024-11-13 12:45:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:45:41,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2024-11-13 12:45:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:41,622 INFO L225 Difference]: With dead ends: 744 [2024-11-13 12:45:41,622 INFO L226 Difference]: Without dead ends: 658 [2024-11-13 12:45:41,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:41,623 INFO L432 NwaCegarLoop]: 183 mSDtfsCounter, 54 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:41,623 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 496 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2024-11-13 12:45:41,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 563. [2024-11-13 12:45:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 522 states have (on average 1.396551724137931) internal successors, (729), 528 states have internal predecessors, (729), 36 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (40), 36 states have call predecessors, (40), 34 states have call successors, (40) [2024-11-13 12:45:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 805 transitions. [2024-11-13 12:45:41,648 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 805 transitions. Word has length 41 [2024-11-13 12:45:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:41,648 INFO L471 AbstractCegarLoop]: Abstraction has 563 states and 805 transitions. [2024-11-13 12:45:41,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 805 transitions. [2024-11-13 12:45:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 12:45:41,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:41,650 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:41,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 12:45:41,650 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:41,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:41,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1269789810, now seen corresponding path program 1 times [2024-11-13 12:45:41,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:41,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640723784] [2024-11-13 12:45:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,711 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,714 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:41,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:41,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640723784] [2024-11-13 12:45:41,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640723784] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:41,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:41,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:45:41,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902627366] [2024-11-13 12:45:41,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:41,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:45:41,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:41,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:45:41,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:41,723 INFO L87 Difference]: Start difference. First operand 563 states and 805 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:41,749 INFO L93 Difference]: Finished difference Result 576 states and 820 transitions. [2024-11-13 12:45:41,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:45:41,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2024-11-13 12:45:41,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:41,753 INFO L225 Difference]: With dead ends: 576 [2024-11-13 12:45:41,753 INFO L226 Difference]: Without dead ends: 569 [2024-11-13 12:45:41,754 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:41,754 INFO L432 NwaCegarLoop]: 135 mSDtfsCounter, 0 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:41,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 398 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:41,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2024-11-13 12:45:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 566. [2024-11-13 12:45:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 525 states have (on average 1.3942857142857144) internal successors, (732), 531 states have internal predecessors, (732), 36 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (40), 36 states have call predecessors, (40), 34 states have call successors, (40) [2024-11-13 12:45:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 808 transitions. [2024-11-13 12:45:41,781 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 808 transitions. Word has length 42 [2024-11-13 12:45:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:41,781 INFO L471 AbstractCegarLoop]: Abstraction has 566 states and 808 transitions. [2024-11-13 12:45:41,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 808 transitions. [2024-11-13 12:45:41,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 12:45:41,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:41,786 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:41,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 12:45:41,786 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:41,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:41,786 INFO L85 PathProgramCache]: Analyzing trace with hash 505217552, now seen corresponding path program 1 times [2024-11-13 12:45:41,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:41,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756137696] [2024-11-13 12:45:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:41,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,878 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,887 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:41,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:41,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756137696] [2024-11-13 12:45:41,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756137696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:41,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:41,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:45:41,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293414180] [2024-11-13 12:45:41,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:41,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:45:41,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:41,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:45:41,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:45:41,909 INFO L87 Difference]: Start difference. First operand 566 states and 808 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:41,960 INFO L93 Difference]: Finished difference Result 573 states and 814 transitions. [2024-11-13 12:45:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:45:41,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2024-11-13 12:45:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:41,964 INFO L225 Difference]: With dead ends: 573 [2024-11-13 12:45:41,964 INFO L226 Difference]: Without dead ends: 566 [2024-11-13 12:45:41,965 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:45:41,966 INFO L432 NwaCegarLoop]: 134 mSDtfsCounter, 3 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:41,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 527 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2024-11-13 12:45:41,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 560. [2024-11-13 12:45:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 519 states have (on average 1.3911368015414258) internal successors, (722), 525 states have internal predecessors, (722), 36 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (40), 36 states have call predecessors, (40), 34 states have call successors, (40) [2024-11-13 12:45:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 798 transitions. [2024-11-13 12:45:41,998 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 798 transitions. Word has length 42 [2024-11-13 12:45:41,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:41,998 INFO L471 AbstractCegarLoop]: Abstraction has 560 states and 798 transitions. [2024-11-13 12:45:41,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:41,999 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 798 transitions. [2024-11-13 12:45:42,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 12:45:42,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:42,005 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:42,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 12:45:42,005 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:42,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:42,006 INFO L85 PathProgramCache]: Analyzing trace with hash -621661305, now seen corresponding path program 1 times [2024-11-13 12:45:42,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:42,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268603257] [2024-11-13 12:45:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:42,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:42,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:42,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:42,242 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:42,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:42,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268603257] [2024-11-13 12:45:42,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268603257] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:42,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924756611] [2024-11-13 12:45:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:42,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:42,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:42,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:42,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 12:45:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:42,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:45:42,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:42,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:42,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924756611] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:42,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:42,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2024-11-13 12:45:42,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770654696] [2024-11-13 12:45:42,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:42,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 12:45:42,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:42,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 12:45:42,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:45:42,566 INFO L87 Difference]: Start difference. First operand 560 states and 798 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-13 12:45:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:42,957 INFO L93 Difference]: Finished difference Result 1412 states and 2025 transitions. [2024-11-13 12:45:42,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 12:45:42,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) Word has length 42 [2024-11-13 12:45:42,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:42,963 INFO L225 Difference]: With dead ends: 1412 [2024-11-13 12:45:42,963 INFO L226 Difference]: Without dead ends: 927 [2024-11-13 12:45:42,964 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-13 12:45:42,965 INFO L432 NwaCegarLoop]: 119 mSDtfsCounter, 115 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:42,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1282 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:45:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2024-11-13 12:45:43,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 865. [2024-11-13 12:45:43,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 804 states have (on average 1.373134328358209) internal successors, (1104), 803 states have internal predecessors, (1104), 56 states have call successors, (56), 2 states have call predecessors, (56), 4 states have return successors, (68), 65 states have call predecessors, (68), 54 states have call successors, (68) [2024-11-13 12:45:43,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1228 transitions. [2024-11-13 12:45:43,020 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1228 transitions. Word has length 42 [2024-11-13 12:45:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:43,020 INFO L471 AbstractCegarLoop]: Abstraction has 865 states and 1228 transitions. [2024-11-13 12:45:43,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-13 12:45:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1228 transitions. [2024-11-13 12:45:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:45:43,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:43,023 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:43,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 12:45:43,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:43,226 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:43,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1438160375, now seen corresponding path program 1 times [2024-11-13 12:45:43,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:43,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765146771] [2024-11-13 12:45:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:43,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:43,392 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:43,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:43,431 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:43,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765146771] [2024-11-13 12:45:43,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765146771] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849427111] [2024-11-13 12:45:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:43,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:43,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:43,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:43,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 12:45:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:43,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 12:45:43,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:43,664 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:45:43,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849427111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:43,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:45:43,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2024-11-13 12:45:43,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027277489] [2024-11-13 12:45:43,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:43,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:45:43,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:43,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:45:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:45:43,665 INFO L87 Difference]: Start difference. First operand 865 states and 1228 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:43,876 INFO L93 Difference]: Finished difference Result 1133 states and 1616 transitions. [2024-11-13 12:45:43,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:45:43,877 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-13 12:45:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:43,882 INFO L225 Difference]: With dead ends: 1133 [2024-11-13 12:45:43,882 INFO L226 Difference]: Without dead ends: 905 [2024-11-13 12:45:43,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:45:43,884 INFO L432 NwaCegarLoop]: 150 mSDtfsCounter, 81 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:43,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1000 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:45:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2024-11-13 12:45:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 895. [2024-11-13 12:45:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 834 states have (on average 1.3585131894484412) internal successors, (1133), 833 states have internal predecessors, (1133), 56 states have call successors, (56), 2 states have call predecessors, (56), 4 states have return successors, (68), 65 states have call predecessors, (68), 54 states have call successors, (68) [2024-11-13 12:45:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1257 transitions. [2024-11-13 12:45:43,924 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1257 transitions. Word has length 44 [2024-11-13 12:45:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:43,925 INFO L471 AbstractCegarLoop]: Abstraction has 895 states and 1257 transitions. [2024-11-13 12:45:43,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:43,926 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1257 transitions. [2024-11-13 12:45:43,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-13 12:45:43,928 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:43,928 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:43,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 12:45:44,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 12:45:44,133 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:44,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash 812572294, now seen corresponding path program 1 times [2024-11-13 12:45:44,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:44,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425635103] [2024-11-13 12:45:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:44,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:44,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:44,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:44,322 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:44,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:44,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425635103] [2024-11-13 12:45:44,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425635103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:44,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397112850] [2024-11-13 12:45:44,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:44,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:44,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:44,331 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:44,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 12:45:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:44,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 12:45:44,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 12:45:44,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 12:45:45,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397112850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:45,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:45,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 12] total 23 [2024-11-13 12:45:45,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922751232] [2024-11-13 12:45:45,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:45,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 12:45:45,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 12:45:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-13 12:45:45,004 INFO L87 Difference]: Start difference. First operand 895 states and 1257 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 19 states have internal predecessors, (64), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 12:45:45,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:45,778 INFO L93 Difference]: Finished difference Result 1060 states and 1487 transitions. [2024-11-13 12:45:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 12:45:45,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 19 states have internal predecessors, (64), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-11-13 12:45:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:45,782 INFO L225 Difference]: With dead ends: 1060 [2024-11-13 12:45:45,782 INFO L226 Difference]: Without dead ends: 810 [2024-11-13 12:45:45,783 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2024-11-13 12:45:45,784 INFO L432 NwaCegarLoop]: 154 mSDtfsCounter, 225 mSDsluCounter, 2496 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 2650 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:45,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 2650 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 12:45:45,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2024-11-13 12:45:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 734. [2024-11-13 12:45:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 685 states have (on average 1.3416058394160584) internal successors, (919), 684 states have internal predecessors, (919), 44 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (56), 53 states have call predecessors, (56), 42 states have call successors, (56) [2024-11-13 12:45:45,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1019 transitions. [2024-11-13 12:45:45,812 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1019 transitions. Word has length 46 [2024-11-13 12:45:45,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:45,812 INFO L471 AbstractCegarLoop]: Abstraction has 734 states and 1019 transitions. [2024-11-13 12:45:45,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 19 states have internal predecessors, (64), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-13 12:45:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1019 transitions. [2024-11-13 12:45:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-13 12:45:45,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:45,814 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:45,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 12:45:46,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 12:45:46,018 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:46,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:46,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1751897264, now seen corresponding path program 1 times [2024-11-13 12:45:46,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:46,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365463427] [2024-11-13 12:45:46,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:46,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:46,091 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:46,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:46,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:46,097 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:46,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365463427] [2024-11-13 12:45:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365463427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:46,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:46,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:45:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46458594] [2024-11-13 12:45:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:46,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:45:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:45:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:46,106 INFO L87 Difference]: Start difference. First operand 734 states and 1019 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:46,138 INFO L93 Difference]: Finished difference Result 777 states and 1076 transitions. [2024-11-13 12:45:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:45:46,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2024-11-13 12:45:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:46,141 INFO L225 Difference]: With dead ends: 777 [2024-11-13 12:45:46,142 INFO L226 Difference]: Without dead ends: 690 [2024-11-13 12:45:46,143 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:46,144 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 39 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:46,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 488 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2024-11-13 12:45:46,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 567. [2024-11-13 12:45:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 532 states have (on average 1.306390977443609) internal successors, (695), 527 states have internal predecessors, (695), 30 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (42), 39 states have call predecessors, (42), 28 states have call successors, (42) [2024-11-13 12:45:46,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 767 transitions. [2024-11-13 12:45:46,172 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 767 transitions. Word has length 47 [2024-11-13 12:45:46,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:46,172 INFO L471 AbstractCegarLoop]: Abstraction has 567 states and 767 transitions. [2024-11-13 12:45:46,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 767 transitions. [2024-11-13 12:45:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 12:45:46,174 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:46,174 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:46,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 12:45:46,175 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:46,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:46,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1078850709, now seen corresponding path program 1 times [2024-11-13 12:45:46,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:46,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476185569] [2024-11-13 12:45:46,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:46,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:46,366 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:46,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:46,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:46,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:46,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476185569] [2024-11-13 12:45:46,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476185569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:46,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025459503] [2024-11-13 12:45:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:46,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:46,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:46,420 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:46,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 12:45:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:46,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 12:45:46,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:46,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:46,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025459503] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:46,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:45:46,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 11] total 15 [2024-11-13 12:45:46,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456492266] [2024-11-13 12:45:46,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:46,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:45:46,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:46,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:45:46,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:45:46,725 INFO L87 Difference]: Start difference. First operand 567 states and 767 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:46,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:46,895 INFO L93 Difference]: Finished difference Result 903 states and 1232 transitions. [2024-11-13 12:45:46,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:45:46,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-13 12:45:46,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:46,899 INFO L225 Difference]: With dead ends: 903 [2024-11-13 12:45:46,899 INFO L226 Difference]: Without dead ends: 863 [2024-11-13 12:45:46,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:45:46,901 INFO L432 NwaCegarLoop]: 144 mSDtfsCounter, 47 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:46,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 627 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:45:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2024-11-13 12:45:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 737. [2024-11-13 12:45:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 690 states have (on average 1.2884057971014493) internal successors, (889), 687 states have internal predecessors, (889), 42 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (54), 51 states have call predecessors, (54), 40 states have call successors, (54) [2024-11-13 12:45:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 985 transitions. [2024-11-13 12:45:46,930 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 985 transitions. Word has length 48 [2024-11-13 12:45:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:46,930 INFO L471 AbstractCegarLoop]: Abstraction has 737 states and 985 transitions. [2024-11-13 12:45:46,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 985 transitions. [2024-11-13 12:45:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 12:45:46,932 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:46,932 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:46,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 12:45:47,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 12:45:47,137 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:47,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:47,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1779915287, now seen corresponding path program 1 times [2024-11-13 12:45:47,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:47,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330376928] [2024-11-13 12:45:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:47,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:47,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:47,182 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:47,184 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:47,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:47,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330376928] [2024-11-13 12:45:47,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330376928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:47,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:47,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:45:47,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574509630] [2024-11-13 12:45:47,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:47,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:45:47,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:47,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:45:47,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:47,189 INFO L87 Difference]: Start difference. First operand 737 states and 985 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:47,217 INFO L93 Difference]: Finished difference Result 756 states and 1006 transitions. [2024-11-13 12:45:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:45:47,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-13 12:45:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:47,221 INFO L225 Difference]: With dead ends: 756 [2024-11-13 12:45:47,221 INFO L226 Difference]: Without dead ends: 693 [2024-11-13 12:45:47,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:47,222 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 0 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:47,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 393 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:47,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2024-11-13 12:45:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 687. [2024-11-13 12:45:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 640 states have (on average 1.2984375) internal successors, (831), 639 states have internal predecessors, (831), 42 states have call successors, (42), 2 states have call predecessors, (42), 4 states have return successors, (52), 49 states have call predecessors, (52), 40 states have call successors, (52) [2024-11-13 12:45:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 925 transitions. [2024-11-13 12:45:47,248 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 925 transitions. Word has length 48 [2024-11-13 12:45:47,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:47,248 INFO L471 AbstractCegarLoop]: Abstraction has 687 states and 925 transitions. [2024-11-13 12:45:47,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:47,248 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 925 transitions. [2024-11-13 12:45:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 12:45:47,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:47,250 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:47,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 12:45:47,250 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:47,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:47,251 INFO L85 PathProgramCache]: Analyzing trace with hash 472326621, now seen corresponding path program 1 times [2024-11-13 12:45:47,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:47,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142534813] [2024-11-13 12:45:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:47,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:47,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:47,377 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:47,406 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:45:47,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:47,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142534813] [2024-11-13 12:45:47,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142534813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:47,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979599230] [2024-11-13 12:45:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:47,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:47,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:47,414 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:47,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 12:45:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:47,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 12:45:47,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:45:47,595 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:45:47,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979599230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:47,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:45:47,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 10 [2024-11-13 12:45:47,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117195874] [2024-11-13 12:45:47,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:47,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 12:45:47,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 12:45:47,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-13 12:45:47,597 INFO L87 Difference]: Start difference. First operand 687 states and 925 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:45:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:47,859 INFO L93 Difference]: Finished difference Result 1375 states and 1862 transitions. [2024-11-13 12:45:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:45:47,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-11-13 12:45:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:47,864 INFO L225 Difference]: With dead ends: 1375 [2024-11-13 12:45:47,865 INFO L226 Difference]: Without dead ends: 1083 [2024-11-13 12:45:47,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:45:47,866 INFO L432 NwaCegarLoop]: 163 mSDtfsCounter, 164 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:47,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1113 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:45:47,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2024-11-13 12:45:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 898. [2024-11-13 12:45:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 837 states have (on average 1.3142174432497014) internal successors, (1100), 832 states have internal predecessors, (1100), 56 states have call successors, (56), 2 states have call predecessors, (56), 4 states have return successors, (70), 67 states have call predecessors, (70), 54 states have call successors, (70) [2024-11-13 12:45:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1226 transitions. [2024-11-13 12:45:47,914 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1226 transitions. Word has length 48 [2024-11-13 12:45:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:47,915 INFO L471 AbstractCegarLoop]: Abstraction has 898 states and 1226 transitions. [2024-11-13 12:45:47,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:45:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1226 transitions. [2024-11-13 12:45:47,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 12:45:47,917 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:47,917 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:47,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 12:45:48,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 12:45:48,122 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:48,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:48,122 INFO L85 PathProgramCache]: Analyzing trace with hash 350800331, now seen corresponding path program 1 times [2024-11-13 12:45:48,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:48,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244847425] [2024-11-13 12:45:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:48,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:48,347 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:48,350 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:48,353 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:48,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:48,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244847425] [2024-11-13 12:45:48,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244847425] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:48,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:48,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 12:45:48,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677260562] [2024-11-13 12:45:48,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:48,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:45:48,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:48,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:45:48,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:45:48,360 INFO L87 Difference]: Start difference. First operand 898 states and 1226 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:48,695 INFO L93 Difference]: Finished difference Result 1262 states and 1736 transitions. [2024-11-13 12:45:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:45:48,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-13 12:45:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:48,700 INFO L225 Difference]: With dead ends: 1262 [2024-11-13 12:45:48,701 INFO L226 Difference]: Without dead ends: 1227 [2024-11-13 12:45:48,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:45:48,702 INFO L432 NwaCegarLoop]: 161 mSDtfsCounter, 63 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:48,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 952 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:45:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2024-11-13 12:45:48,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 999. [2024-11-13 12:45:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 929 states have (on average 1.3035522066738428) internal successors, (1211), 925 states have internal predecessors, (1211), 65 states have call successors, (65), 2 states have call predecessors, (65), 4 states have return successors, (79), 76 states have call predecessors, (79), 63 states have call successors, (79) [2024-11-13 12:45:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1355 transitions. [2024-11-13 12:45:48,750 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1355 transitions. Word has length 50 [2024-11-13 12:45:48,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:48,750 INFO L471 AbstractCegarLoop]: Abstraction has 999 states and 1355 transitions. [2024-11-13 12:45:48,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:48,751 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1355 transitions. [2024-11-13 12:45:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 12:45:48,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:48,753 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:48,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-13 12:45:48,753 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:48,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:48,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1284593707, now seen corresponding path program 1 times [2024-11-13 12:45:48,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:48,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98558634] [2024-11-13 12:45:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:48,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:48,838 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:48,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:48,843 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:48,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:48,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98558634] [2024-11-13 12:45:48,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98558634] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:48,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:48,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:45:48,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413792750] [2024-11-13 12:45:48,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:48,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:45:48,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:48,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:45:48,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:45:48,848 INFO L87 Difference]: Start difference. First operand 999 states and 1355 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:49,019 INFO L93 Difference]: Finished difference Result 1154 states and 1556 transitions. [2024-11-13 12:45:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:45:49,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-13 12:45:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:49,025 INFO L225 Difference]: With dead ends: 1154 [2024-11-13 12:45:49,025 INFO L226 Difference]: Without dead ends: 1118 [2024-11-13 12:45:49,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:45:49,026 INFO L432 NwaCegarLoop]: 152 mSDtfsCounter, 47 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:49,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 530 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:45:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2024-11-13 12:45:49,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1066. [2024-11-13 12:45:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 991 states have (on average 1.3077699293642786) internal successors, (1296), 989 states have internal predecessors, (1296), 70 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (84), 80 states have call predecessors, (84), 68 states have call successors, (84) [2024-11-13 12:45:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1450 transitions. [2024-11-13 12:45:49,078 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1450 transitions. Word has length 50 [2024-11-13 12:45:49,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:49,079 INFO L471 AbstractCegarLoop]: Abstraction has 1066 states and 1450 transitions. [2024-11-13 12:45:49,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1450 transitions. [2024-11-13 12:45:49,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 12:45:49,081 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:49,081 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:49,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-13 12:45:49,081 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:49,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:49,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1197261800, now seen corresponding path program 1 times [2024-11-13 12:45:49,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:49,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694359051] [2024-11-13 12:45:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:49,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:49,254 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:49,258 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:49,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:45:49,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:49,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694359051] [2024-11-13 12:45:49,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694359051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:49,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101212868] [2024-11-13 12:45:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:49,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:49,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:49,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:49,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 12:45:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:49,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 12:45:49,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:45:49,601 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:45:49,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101212868] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:49,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:45:49,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 15 [2024-11-13 12:45:49,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540622839] [2024-11-13 12:45:49,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:49,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:45:49,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:45:49,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:45:49,603 INFO L87 Difference]: Start difference. First operand 1066 states and 1450 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:45:50,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:50,058 INFO L93 Difference]: Finished difference Result 1210 states and 1628 transitions. [2024-11-13 12:45:50,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 12:45:50,059 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-11-13 12:45:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:50,064 INFO L225 Difference]: With dead ends: 1210 [2024-11-13 12:45:50,064 INFO L226 Difference]: Without dead ends: 1208 [2024-11-13 12:45:50,065 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-13 12:45:50,065 INFO L432 NwaCegarLoop]: 151 mSDtfsCounter, 133 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:50,066 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1688 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:45:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2024-11-13 12:45:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1074. [2024-11-13 12:45:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 997 states have (on average 1.3059177532597794) internal successors, (1302), 996 states have internal predecessors, (1302), 71 states have call successors, (71), 3 states have call predecessors, (71), 5 states have return successors, (85), 80 states have call predecessors, (85), 69 states have call successors, (85) [2024-11-13 12:45:50,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1458 transitions. [2024-11-13 12:45:50,122 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1458 transitions. Word has length 50 [2024-11-13 12:45:50,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:50,122 INFO L471 AbstractCegarLoop]: Abstraction has 1074 states and 1458 transitions. [2024-11-13 12:45:50,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:45:50,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1458 transitions. [2024-11-13 12:45:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 12:45:50,125 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:50,125 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:50,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 12:45:50,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:50,330 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:50,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:50,330 INFO L85 PathProgramCache]: Analyzing trace with hash 907043814, now seen corresponding path program 1 times [2024-11-13 12:45:50,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:50,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607775976] [2024-11-13 12:45:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:50,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:50,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:50,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:50,365 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:50,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:50,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607775976] [2024-11-13 12:45:50,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607775976] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:50,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:50,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:45:50,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512814077] [2024-11-13 12:45:50,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:50,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:45:50,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:45:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:45:50,384 INFO L87 Difference]: Start difference. First operand 1074 states and 1458 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:50,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:50,478 INFO L93 Difference]: Finished difference Result 2145 states and 2920 transitions. [2024-11-13 12:45:50,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:45:50,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-11-13 12:45:50,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:50,483 INFO L225 Difference]: With dead ends: 2145 [2024-11-13 12:45:50,484 INFO L226 Difference]: Without dead ends: 1082 [2024-11-13 12:45:50,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:45:50,488 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 10 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:50,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 237 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2024-11-13 12:45:50,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1077. [2024-11-13 12:45:50,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1000 states have (on average 1.306) internal successors, (1306), 999 states have internal predecessors, (1306), 71 states have call successors, (71), 3 states have call predecessors, (71), 5 states have return successors, (85), 80 states have call predecessors, (85), 69 states have call successors, (85) [2024-11-13 12:45:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1462 transitions. [2024-11-13 12:45:50,545 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1462 transitions. Word has length 51 [2024-11-13 12:45:50,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:50,545 INFO L471 AbstractCegarLoop]: Abstraction has 1077 states and 1462 transitions. [2024-11-13 12:45:50,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:50,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1462 transitions. [2024-11-13 12:45:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 12:45:50,548 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:50,548 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:50,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-13 12:45:50,548 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:50,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:50,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1609857927, now seen corresponding path program 1 times [2024-11-13 12:45:50,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:50,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178334520] [2024-11-13 12:45:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:50,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:50,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:50,597 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:50,600 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:50,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:50,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178334520] [2024-11-13 12:45:50,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178334520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:50,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:50,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:45:50,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273999007] [2024-11-13 12:45:50,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:50,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:45:50,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:50,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:45:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:50,605 INFO L87 Difference]: Start difference. First operand 1077 states and 1462 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:50,642 INFO L93 Difference]: Finished difference Result 1086 states and 1470 transitions. [2024-11-13 12:45:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:45:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-13 12:45:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:50,646 INFO L225 Difference]: With dead ends: 1086 [2024-11-13 12:45:50,646 INFO L226 Difference]: Without dead ends: 1038 [2024-11-13 12:45:50,647 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:50,648 INFO L432 NwaCegarLoop]: 132 mSDtfsCounter, 0 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:50,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 390 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2024-11-13 12:45:50,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 970. [2024-11-13 12:45:50,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 900 states have (on average 1.3222222222222222) internal successors, (1190), 901 states have internal predecessors, (1190), 64 states have call successors, (64), 3 states have call predecessors, (64), 5 states have return successors, (75), 70 states have call predecessors, (75), 61 states have call successors, (75) [2024-11-13 12:45:50,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1329 transitions. [2024-11-13 12:45:50,698 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1329 transitions. Word has length 52 [2024-11-13 12:45:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:50,698 INFO L471 AbstractCegarLoop]: Abstraction has 970 states and 1329 transitions. [2024-11-13 12:45:50,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1329 transitions. [2024-11-13 12:45:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 12:45:50,701 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:50,701 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:50,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-13 12:45:50,701 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:50,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:50,702 INFO L85 PathProgramCache]: Analyzing trace with hash 58599821, now seen corresponding path program 1 times [2024-11-13 12:45:50,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:50,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525407363] [2024-11-13 12:45:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:50,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:50,894 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:50,897 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:50,900 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:45:50,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:50,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525407363] [2024-11-13 12:45:50,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525407363] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:50,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:50,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 12:45:50,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275282447] [2024-11-13 12:45:50,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:50,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:45:50,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:50,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:45:50,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:45:50,905 INFO L87 Difference]: Start difference. First operand 970 states and 1329 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:51,218 INFO L93 Difference]: Finished difference Result 1343 states and 1850 transitions. [2024-11-13 12:45:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:45:51,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-13 12:45:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:51,225 INFO L225 Difference]: With dead ends: 1343 [2024-11-13 12:45:51,225 INFO L226 Difference]: Without dead ends: 1286 [2024-11-13 12:45:51,226 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:45:51,227 INFO L432 NwaCegarLoop]: 127 mSDtfsCounter, 57 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:51,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 631 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:45:51,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-11-13 12:45:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 993. [2024-11-13 12:45:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 919 states have (on average 1.3318824809575627) internal successors, (1224), 921 states have internal predecessors, (1224), 68 states have call successors, (68), 3 states have call predecessors, (68), 5 states have return successors, (75), 72 states have call predecessors, (75), 65 states have call successors, (75) [2024-11-13 12:45:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1367 transitions. [2024-11-13 12:45:51,282 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1367 transitions. Word has length 52 [2024-11-13 12:45:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:51,283 INFO L471 AbstractCegarLoop]: Abstraction has 993 states and 1367 transitions. [2024-11-13 12:45:51,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1367 transitions. [2024-11-13 12:45:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 12:45:51,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:51,285 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:51,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-13 12:45:51,286 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:51,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:51,286 INFO L85 PathProgramCache]: Analyzing trace with hash -14073178, now seen corresponding path program 1 times [2024-11-13 12:45:51,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:51,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031432075] [2024-11-13 12:45:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:51,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:51,318 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:51,320 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:51,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:51,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:51,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031432075] [2024-11-13 12:45:51,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031432075] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:51,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:51,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:45:51,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552355334] [2024-11-13 12:45:51,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:51,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:45:51,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:51,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:45:51,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:45:51,343 INFO L87 Difference]: Start difference. First operand 993 states and 1367 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:51,415 INFO L93 Difference]: Finished difference Result 1983 states and 2734 transitions. [2024-11-13 12:45:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:45:51,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-13 12:45:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:51,420 INFO L225 Difference]: With dead ends: 1983 [2024-11-13 12:45:51,420 INFO L226 Difference]: Without dead ends: 999 [2024-11-13 12:45:51,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:45:51,435 INFO L432 NwaCegarLoop]: 131 mSDtfsCounter, 5 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:51,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 242 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2024-11-13 12:45:51,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 995. [2024-11-13 12:45:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 921 states have (on average 1.3311617806731812) internal successors, (1226), 923 states have internal predecessors, (1226), 68 states have call successors, (68), 3 states have call predecessors, (68), 5 states have return successors, (75), 72 states have call predecessors, (75), 65 states have call successors, (75) [2024-11-13 12:45:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1369 transitions. [2024-11-13 12:45:51,487 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1369 transitions. Word has length 52 [2024-11-13 12:45:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:51,487 INFO L471 AbstractCegarLoop]: Abstraction has 995 states and 1369 transitions. [2024-11-13 12:45:51,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1369 transitions. [2024-11-13 12:45:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 12:45:51,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:51,489 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:51,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-13 12:45:51,490 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:51,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:51,491 INFO L85 PathProgramCache]: Analyzing trace with hash -440589591, now seen corresponding path program 1 times [2024-11-13 12:45:51,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:51,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464251982] [2024-11-13 12:45:51,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:51,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:51,602 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:51,605 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:51,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:51,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:51,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464251982] [2024-11-13 12:45:51,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464251982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:51,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081168062] [2024-11-13 12:45:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:51,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:51,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:51,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:51,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 12:45:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:51,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 12:45:51,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:51,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:51,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081168062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:51,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:51,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 16 [2024-11-13 12:45:51,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251891877] [2024-11-13 12:45:51,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:51,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 12:45:51,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:51,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 12:45:51,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:45:51,963 INFO L87 Difference]: Start difference. First operand 995 states and 1369 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 14 states have internal predecessors, (61), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 12:45:52,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:52,261 INFO L93 Difference]: Finished difference Result 1205 states and 1653 transitions. [2024-11-13 12:45:52,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:45:52,262 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 14 states have internal predecessors, (61), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2024-11-13 12:45:52,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:52,266 INFO L225 Difference]: With dead ends: 1205 [2024-11-13 12:45:52,266 INFO L226 Difference]: Without dead ends: 1013 [2024-11-13 12:45:52,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:45:52,267 INFO L432 NwaCegarLoop]: 126 mSDtfsCounter, 97 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:52,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1704 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:45:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2024-11-13 12:45:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 943. [2024-11-13 12:45:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 872 states have (on average 1.3256880733944953) internal successors, (1156), 874 states have internal predecessors, (1156), 65 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (72), 69 states have call predecessors, (72), 62 states have call successors, (72) [2024-11-13 12:45:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1293 transitions. [2024-11-13 12:45:52,329 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1293 transitions. Word has length 53 [2024-11-13 12:45:52,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:52,329 INFO L471 AbstractCegarLoop]: Abstraction has 943 states and 1293 transitions. [2024-11-13 12:45:52,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 14 states have internal predecessors, (61), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 12:45:52,329 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1293 transitions. [2024-11-13 12:45:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 12:45:52,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:52,332 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:52,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 12:45:52,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 12:45:52,537 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:52,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:52,537 INFO L85 PathProgramCache]: Analyzing trace with hash -833616601, now seen corresponding path program 1 times [2024-11-13 12:45:52,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:52,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534463695] [2024-11-13 12:45:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:52,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:52,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:52,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:52,769 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:52,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:52,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534463695] [2024-11-13 12:45:52,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534463695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:52,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631672487] [2024-11-13 12:45:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:52,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:52,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:52,783 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:52,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 12:45:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:52,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 12:45:52,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:52,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:53,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631672487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:53,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:53,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-13 12:45:53,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717006741] [2024-11-13 12:45:53,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:53,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 12:45:53,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:53,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 12:45:53,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:45:53,055 INFO L87 Difference]: Start difference. First operand 943 states and 1293 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 12 states have internal predecessors, (54), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 12:45:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:53,385 INFO L93 Difference]: Finished difference Result 1352 states and 1860 transitions. [2024-11-13 12:45:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:45:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 12 states have internal predecessors, (54), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2024-11-13 12:45:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:53,389 INFO L225 Difference]: With dead ends: 1352 [2024-11-13 12:45:53,389 INFO L226 Difference]: Without dead ends: 1109 [2024-11-13 12:45:53,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:45:53,391 INFO L432 NwaCegarLoop]: 132 mSDtfsCounter, 137 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:53,392 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1381 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:45:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2024-11-13 12:45:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 945. [2024-11-13 12:45:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 874 states have (on average 1.3169336384439359) internal successors, (1151), 876 states have internal predecessors, (1151), 65 states have call successors, (65), 3 states have call predecessors, (65), 5 states have return successors, (72), 69 states have call predecessors, (72), 62 states have call successors, (72) [2024-11-13 12:45:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1288 transitions. [2024-11-13 12:45:53,444 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1288 transitions. Word has length 53 [2024-11-13 12:45:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:53,444 INFO L471 AbstractCegarLoop]: Abstraction has 945 states and 1288 transitions. [2024-11-13 12:45:53,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 12 states have internal predecessors, (54), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 12:45:53,447 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1288 transitions. [2024-11-13 12:45:53,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 12:45:53,448 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:53,448 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:53,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-13 12:45:53,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 12:45:53,653 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:53,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:53,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1123641153, now seen corresponding path program 2 times [2024-11-13 12:45:53,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:53,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894783740] [2024-11-13 12:45:53,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:53,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:54,049 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:54,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:54,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-13 12:45:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:54,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:54,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894783740] [2024-11-13 12:45:54,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894783740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:54,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:54,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-13 12:45:54,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216657116] [2024-11-13 12:45:54,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:54,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:45:54,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:54,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:45:54,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:45:54,105 INFO L87 Difference]: Start difference. First operand 945 states and 1288 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:54,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:54,425 INFO L93 Difference]: Finished difference Result 1076 states and 1468 transitions. [2024-11-13 12:45:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:45:54,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2024-11-13 12:45:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:54,430 INFO L225 Difference]: With dead ends: 1076 [2024-11-13 12:45:54,430 INFO L226 Difference]: Without dead ends: 1074 [2024-11-13 12:45:54,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:45:54,431 INFO L432 NwaCegarLoop]: 164 mSDtfsCounter, 121 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:54,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1655 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:45:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2024-11-13 12:45:54,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 961. [2024-11-13 12:45:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 886 states have (on average 1.3126410835214446) internal successors, (1163), 891 states have internal predecessors, (1163), 68 states have call successors, (68), 4 states have call predecessors, (68), 6 states have return successors, (75), 69 states have call predecessors, (75), 65 states have call successors, (75) [2024-11-13 12:45:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1306 transitions. [2024-11-13 12:45:54,481 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1306 transitions. Word has length 53 [2024-11-13 12:45:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:54,482 INFO L471 AbstractCegarLoop]: Abstraction has 961 states and 1306 transitions. [2024-11-13 12:45:54,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1306 transitions. [2024-11-13 12:45:54,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 12:45:54,483 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:54,484 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:54,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-13 12:45:54,484 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:54,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:54,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1260289330, now seen corresponding path program 1 times [2024-11-13 12:45:54,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:54,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7565313] [2024-11-13 12:45:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:54,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:54,716 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:54,719 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:54,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:54,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:54,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7565313] [2024-11-13 12:45:54,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7565313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:54,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950595485] [2024-11-13 12:45:54,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:54,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:54,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:54,766 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:54,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 12:45:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:54,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 12:45:54,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:54,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 12:45:55,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950595485] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:55,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:45:55,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 10] total 19 [2024-11-13 12:45:55,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847521180] [2024-11-13 12:45:55,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:55,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:45:55,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:55,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:45:55,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-11-13 12:45:55,089 INFO L87 Difference]: Start difference. First operand 961 states and 1306 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:55,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:55,293 INFO L93 Difference]: Finished difference Result 1084 states and 1454 transitions. [2024-11-13 12:45:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:45:55,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2024-11-13 12:45:55,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:55,297 INFO L225 Difference]: With dead ends: 1084 [2024-11-13 12:45:55,298 INFO L226 Difference]: Without dead ends: 1018 [2024-11-13 12:45:55,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-11-13 12:45:55,299 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 51 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:55,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 520 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:45:55,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2024-11-13 12:45:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 968. [2024-11-13 12:45:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 894 states have (on average 1.2729306487695748) internal successors, (1138), 900 states have internal predecessors, (1138), 67 states have call successors, (67), 4 states have call predecessors, (67), 6 states have return successors, (74), 68 states have call predecessors, (74), 64 states have call successors, (74) [2024-11-13 12:45:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1279 transitions. [2024-11-13 12:45:55,351 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1279 transitions. Word has length 54 [2024-11-13 12:45:55,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:55,352 INFO L471 AbstractCegarLoop]: Abstraction has 968 states and 1279 transitions. [2024-11-13 12:45:55,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:55,352 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1279 transitions. [2024-11-13 12:45:55,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 12:45:55,354 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:55,354 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:55,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 12:45:55,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 12:45:55,560 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:55,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:55,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1430949948, now seen corresponding path program 1 times [2024-11-13 12:45:55,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:55,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277596829] [2024-11-13 12:45:55,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:55,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:55,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:55,970 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:56,006 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:56,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:56,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277596829] [2024-11-13 12:45:56,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277596829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:56,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998992690] [2024-11-13 12:45:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:56,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:56,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:56,025 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:56,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 12:45:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:56,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 12:45:56,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:45:56,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 12:45:56,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998992690] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:56,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:45:56,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 11] total 18 [2024-11-13 12:45:56,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153734814] [2024-11-13 12:45:56,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:56,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:45:56,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:56,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:45:56,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:45:56,611 INFO L87 Difference]: Start difference. First operand 968 states and 1279 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:56,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:56,747 INFO L93 Difference]: Finished difference Result 974 states and 1284 transitions. [2024-11-13 12:45:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:45:56,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2024-11-13 12:45:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:56,751 INFO L225 Difference]: With dead ends: 974 [2024-11-13 12:45:56,751 INFO L226 Difference]: Without dead ends: 972 [2024-11-13 12:45:56,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-13 12:45:56,753 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 12 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:56,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 707 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:45:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2024-11-13 12:45:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 972. [2024-11-13 12:45:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 897 states have (on average 1.2720178372352284) internal successors, (1141), 903 states have internal predecessors, (1141), 67 states have call successors, (67), 5 states have call predecessors, (67), 7 states have return successors, (74), 68 states have call predecessors, (74), 64 states have call successors, (74) [2024-11-13 12:45:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1282 transitions. [2024-11-13 12:45:56,816 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1282 transitions. Word has length 55 [2024-11-13 12:45:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:56,816 INFO L471 AbstractCegarLoop]: Abstraction has 972 states and 1282 transitions. [2024-11-13 12:45:56,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1282 transitions. [2024-11-13 12:45:56,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-13 12:45:56,818 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:56,818 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:56,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 12:45:57,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 12:45:57,023 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:57,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:57,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1115745870, now seen corresponding path program 1 times [2024-11-13 12:45:57,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:57,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025318565] [2024-11-13 12:45:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:57,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:57,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:57,119 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:57,122 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:57,125 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 12:45:57,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:57,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025318565] [2024-11-13 12:45:57,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025318565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:57,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:57,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:45:57,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471939757] [2024-11-13 12:45:57,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:57,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:45:57,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:57,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:45:57,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:45:57,134 INFO L87 Difference]: Start difference. First operand 972 states and 1282 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:57,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:57,228 INFO L93 Difference]: Finished difference Result 984 states and 1294 transitions. [2024-11-13 12:45:57,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:45:57,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2024-11-13 12:45:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:57,232 INFO L225 Difference]: With dead ends: 984 [2024-11-13 12:45:57,232 INFO L226 Difference]: Without dead ends: 982 [2024-11-13 12:45:57,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:45:57,234 INFO L432 NwaCegarLoop]: 131 mSDtfsCounter, 8 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:57,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 641 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2024-11-13 12:45:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 978. [2024-11-13 12:45:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 901 states have (on average 1.2708102108768036) internal successors, (1145), 908 states have internal predecessors, (1145), 68 states have call successors, (68), 6 states have call predecessors, (68), 8 states have return successors, (75), 68 states have call predecessors, (75), 65 states have call successors, (75) [2024-11-13 12:45:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1288 transitions. [2024-11-13 12:45:57,291 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1288 transitions. Word has length 56 [2024-11-13 12:45:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:57,292 INFO L471 AbstractCegarLoop]: Abstraction has 978 states and 1288 transitions. [2024-11-13 12:45:57,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1288 transitions. [2024-11-13 12:45:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-13 12:45:57,296 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:57,296 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:57,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-13 12:45:57,296 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:57,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:57,299 INFO L85 PathProgramCache]: Analyzing trace with hash 179766748, now seen corresponding path program 1 times [2024-11-13 12:45:57,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:57,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861092442] [2024-11-13 12:45:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:57,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:57,397 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:57,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:57,405 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-13 12:45:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 12:45:57,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:57,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861092442] [2024-11-13 12:45:57,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861092442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:57,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:57,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:45:57,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517669952] [2024-11-13 12:45:57,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:57,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:45:57,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:57,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:45:57,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:45:57,410 INFO L87 Difference]: Start difference. First operand 978 states and 1288 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:57,495 INFO L93 Difference]: Finished difference Result 1013 states and 1323 transitions. [2024-11-13 12:45:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:45:57,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2024-11-13 12:45:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:57,499 INFO L225 Difference]: With dead ends: 1013 [2024-11-13 12:45:57,500 INFO L226 Difference]: Without dead ends: 1011 [2024-11-13 12:45:57,501 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:45:57,501 INFO L432 NwaCegarLoop]: 153 mSDtfsCounter, 19 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:57,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 728 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:45:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2024-11-13 12:45:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 982. [2024-11-13 12:45:57,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 904 states have (on average 1.2699115044247788) internal successors, (1148), 911 states have internal predecessors, (1148), 68 states have call successors, (68), 7 states have call predecessors, (68), 9 states have return successors, (75), 68 states have call predecessors, (75), 65 states have call successors, (75) [2024-11-13 12:45:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1291 transitions. [2024-11-13 12:45:57,559 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1291 transitions. Word has length 56 [2024-11-13 12:45:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:57,560 INFO L471 AbstractCegarLoop]: Abstraction has 982 states and 1291 transitions. [2024-11-13 12:45:57,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:45:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1291 transitions. [2024-11-13 12:45:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-13 12:45:57,562 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:57,562 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:57,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-13 12:45:57,562 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:45:57,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:57,563 INFO L85 PathProgramCache]: Analyzing trace with hash 186524593, now seen corresponding path program 1 times [2024-11-13 12:45:57,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:57,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240647400] [2024-11-13 12:45:57,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:57,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:57,976 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:45:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:58,008 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:45:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:58,012 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:45:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 12:45:58,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:58,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240647400] [2024-11-13 12:45:58,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240647400] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:58,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629729615] [2024-11-13 12:45:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:58,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:58,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:58,106 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:58,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 12:45:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:58,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 12:45:58,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:59,892 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:45:59,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629729615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:59,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:45:59,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [18] total 29 [2024-11-13 12:45:59,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661885645] [2024-11-13 12:45:59,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:59,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:45:59,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:59,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:45:59,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-11-13 12:45:59,895 INFO L87 Difference]: Start difference. First operand 982 states and 1291 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:00,493 INFO L93 Difference]: Finished difference Result 1819 states and 2393 transitions. [2024-11-13 12:46:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 12:46:00,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2024-11-13 12:46:00,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:00,503 INFO L225 Difference]: With dead ends: 1819 [2024-11-13 12:46:00,503 INFO L226 Difference]: Without dead ends: 1761 [2024-11-13 12:46:00,504 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-11-13 12:46:00,505 INFO L432 NwaCegarLoop]: 268 mSDtfsCounter, 182 mSDsluCounter, 1904 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 2172 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:00,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 2172 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 12:46:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2024-11-13 12:46:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1055. [2024-11-13 12:46:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 975 states have (on average 1.2728205128205128) internal successors, (1241), 977 states have internal predecessors, (1241), 69 states have call successors, (69), 7 states have call predecessors, (69), 10 states have return successors, (85), 75 states have call predecessors, (85), 66 states have call successors, (85) [2024-11-13 12:46:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1395 transitions. [2024-11-13 12:46:00,574 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1395 transitions. Word has length 57 [2024-11-13 12:46:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:00,574 INFO L471 AbstractCegarLoop]: Abstraction has 1055 states and 1395 transitions. [2024-11-13 12:46:00,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1395 transitions. [2024-11-13 12:46:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-13 12:46:00,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:00,577 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:00,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 12:46:00,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-13 12:46:00,777 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:00,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash 609226419, now seen corresponding path program 1 times [2024-11-13 12:46:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:00,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982412456] [2024-11-13 12:46:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:00,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:00,911 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:46:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:00,941 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:46:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:00,945 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:46:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:46:00,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:00,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982412456] [2024-11-13 12:46:00,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982412456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:00,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307964178] [2024-11-13 12:46:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:00,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:00,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:00,957 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:00,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 12:46:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:01,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 12:46:01,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:46:01,280 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:01,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307964178] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:01,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:46:01,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2024-11-13 12:46:01,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893377786] [2024-11-13 12:46:01,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:01,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:46:01,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:01,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:46:01,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:46:01,282 INFO L87 Difference]: Start difference. First operand 1055 states and 1395 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:01,830 INFO L93 Difference]: Finished difference Result 1525 states and 2010 transitions. [2024-11-13 12:46:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 12:46:01,830 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2024-11-13 12:46:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:01,835 INFO L225 Difference]: With dead ends: 1525 [2024-11-13 12:46:01,836 INFO L226 Difference]: Without dead ends: 1406 [2024-11-13 12:46:01,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2024-11-13 12:46:01,837 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 100 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:01,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 1046 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:46:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2024-11-13 12:46:01,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1055. [2024-11-13 12:46:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 975 states have (on average 1.2707692307692309) internal successors, (1239), 978 states have internal predecessors, (1239), 69 states have call successors, (69), 7 states have call predecessors, (69), 10 states have return successors, (84), 74 states have call predecessors, (84), 66 states have call successors, (84) [2024-11-13 12:46:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1392 transitions. [2024-11-13 12:46:01,911 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1392 transitions. Word has length 57 [2024-11-13 12:46:01,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:01,912 INFO L471 AbstractCegarLoop]: Abstraction has 1055 states and 1392 transitions. [2024-11-13 12:46:01,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:01,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1392 transitions. [2024-11-13 12:46:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-13 12:46:01,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:01,914 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:01,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-13 12:46:02,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-13 12:46:02,119 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:02,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:02,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1907861906, now seen corresponding path program 1 times [2024-11-13 12:46:02,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:02,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409893039] [2024-11-13 12:46:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:02,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:02,574 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:46:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:02,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:46:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:02,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:46:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:46:02,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:02,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409893039] [2024-11-13 12:46:02,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409893039] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:02,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362129763] [2024-11-13 12:46:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:02,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:02,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:02,631 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:02,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 12:46:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:02,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 12:46:02,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:46:02,921 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:02,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362129763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:02,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:46:02,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2024-11-13 12:46:02,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318693036] [2024-11-13 12:46:02,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:02,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:46:02,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:02,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:46:02,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:46:02,923 INFO L87 Difference]: Start difference. First operand 1055 states and 1392 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:03,232 INFO L93 Difference]: Finished difference Result 1492 states and 1951 transitions. [2024-11-13 12:46:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:46:03,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2024-11-13 12:46:03,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:03,240 INFO L225 Difference]: With dead ends: 1492 [2024-11-13 12:46:03,241 INFO L226 Difference]: Without dead ends: 1426 [2024-11-13 12:46:03,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:46:03,243 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 108 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:03,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1018 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:46:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2024-11-13 12:46:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 948. [2024-11-13 12:46:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 875 states have (on average 1.2651428571428571) internal successors, (1107), 882 states have internal predecessors, (1107), 63 states have call successors, (63), 7 states have call predecessors, (63), 9 states have return successors, (69), 62 states have call predecessors, (69), 60 states have call successors, (69) [2024-11-13 12:46:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1239 transitions. [2024-11-13 12:46:03,330 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1239 transitions. Word has length 58 [2024-11-13 12:46:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:03,331 INFO L471 AbstractCegarLoop]: Abstraction has 948 states and 1239 transitions. [2024-11-13 12:46:03,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1239 transitions. [2024-11-13 12:46:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 12:46:03,334 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:03,334 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:03,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 12:46:03,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:03,535 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:03,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash -763780222, now seen corresponding path program 1 times [2024-11-13 12:46:03,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:03,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972778615] [2024-11-13 12:46:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:03,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:03,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:46:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:03,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 12:46:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:03,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:46:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 12:46:03,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:03,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972778615] [2024-11-13 12:46:03,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972778615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:03,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715916347] [2024-11-13 12:46:03,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:03,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:03,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:03,610 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:03,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 12:46:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:03,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:46:03,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:46:03,714 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:03,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715916347] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:03,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:46:03,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-13 12:46:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530579594] [2024-11-13 12:46:03,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:03,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:46:03,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:46:03,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:46:03,716 INFO L87 Difference]: Start difference. First operand 948 states and 1239 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:46:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:03,807 INFO L93 Difference]: Finished difference Result 1884 states and 2465 transitions. [2024-11-13 12:46:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:46:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2024-11-13 12:46:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:03,810 INFO L225 Difference]: With dead ends: 1884 [2024-11-13 12:46:03,811 INFO L226 Difference]: Without dead ends: 961 [2024-11-13 12:46:03,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:46:03,813 INFO L432 NwaCegarLoop]: 122 mSDtfsCounter, 15 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:03,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 349 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:46:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2024-11-13 12:46:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 952. [2024-11-13 12:46:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 878 states have (on average 1.265375854214123) internal successors, (1111), 886 states have internal predecessors, (1111), 63 states have call successors, (63), 7 states have call predecessors, (63), 10 states have return successors, (75), 62 states have call predecessors, (75), 60 states have call successors, (75) [2024-11-13 12:46:03,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1249 transitions. [2024-11-13 12:46:03,876 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1249 transitions. Word has length 60 [2024-11-13 12:46:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:03,876 INFO L471 AbstractCegarLoop]: Abstraction has 952 states and 1249 transitions. [2024-11-13 12:46:03,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:46:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1249 transitions. [2024-11-13 12:46:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-13 12:46:03,882 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:03,882 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:03,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 12:46:04,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:04,083 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:04,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash 300478610, now seen corresponding path program 1 times [2024-11-13 12:46:04,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:04,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008431177] [2024-11-13 12:46:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:04,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:46:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,179 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:46:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,182 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:46:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,185 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-11-13 12:46:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:46:04,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:04,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008431177] [2024-11-13 12:46:04,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008431177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:04,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:04,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:46:04,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401889542] [2024-11-13 12:46:04,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:04,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:46:04,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:04,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:46:04,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:46:04,191 INFO L87 Difference]: Start difference. First operand 952 states and 1249 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 12:46:04,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:04,339 INFO L93 Difference]: Finished difference Result 1041 states and 1379 transitions. [2024-11-13 12:46:04,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:46:04,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2024-11-13 12:46:04,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:04,343 INFO L225 Difference]: With dead ends: 1041 [2024-11-13 12:46:04,343 INFO L226 Difference]: Without dead ends: 1036 [2024-11-13 12:46:04,344 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 [2024-11-13 12:46:04,344 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 10 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:04,344 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 477 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:46:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2024-11-13 12:46:04,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1001. [2024-11-13 12:46:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 911 states have (on average 1.283205268935236) internal successors, (1169), 934 states have internal predecessors, (1169), 78 states have call successors, (78), 8 states have call predecessors, (78), 11 states have return successors, (90), 62 states have call predecessors, (90), 75 states have call successors, (90) [2024-11-13 12:46:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1337 transitions. [2024-11-13 12:46:04,417 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1337 transitions. Word has length 64 [2024-11-13 12:46:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:04,418 INFO L471 AbstractCegarLoop]: Abstraction has 1001 states and 1337 transitions. [2024-11-13 12:46:04,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 12:46:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1337 transitions. [2024-11-13 12:46:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-13 12:46:04,421 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:04,421 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:04,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-13 12:46:04,422 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:04,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2032305235, now seen corresponding path program 1 times [2024-11-13 12:46:04,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:04,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852035427] [2024-11-13 12:46:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:04,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,510 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:46:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:46:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,517 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-13 12:46:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,520 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-11-13 12:46:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 12:46:04,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:04,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852035427] [2024-11-13 12:46:04,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852035427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:04,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:04,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:46:04,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847380456] [2024-11-13 12:46:04,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:04,522 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:46:04,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:46:04,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:46:04,523 INFO L87 Difference]: Start difference. First operand 1001 states and 1337 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 12:46:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:04,626 INFO L93 Difference]: Finished difference Result 1039 states and 1379 transitions. [2024-11-13 12:46:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:46:04,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2024-11-13 12:46:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:04,630 INFO L225 Difference]: With dead ends: 1039 [2024-11-13 12:46:04,630 INFO L226 Difference]: Without dead ends: 1023 [2024-11-13 12:46:04,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:46:04,631 INFO L432 NwaCegarLoop]: 146 mSDtfsCounter, 15 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:04,632 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 701 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:46:04,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2024-11-13 12:46:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 999. [2024-11-13 12:46:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 906 states have (on average 1.2770419426048565) internal successors, (1157), 932 states have internal predecessors, (1157), 80 states have call successors, (80), 9 states have call predecessors, (80), 12 states have return successors, (92), 61 states have call predecessors, (92), 77 states have call successors, (92) [2024-11-13 12:46:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1329 transitions. [2024-11-13 12:46:04,706 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1329 transitions. Word has length 64 [2024-11-13 12:46:04,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:04,706 INFO L471 AbstractCegarLoop]: Abstraction has 999 states and 1329 transitions. [2024-11-13 12:46:04,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 12:46:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1329 transitions. [2024-11-13 12:46:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-13 12:46:04,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:04,709 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:04,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-13 12:46:04,709 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:04,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:04,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1315265757, now seen corresponding path program 1 times [2024-11-13 12:46:04,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:04,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655719357] [2024-11-13 12:46:04,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:04,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,765 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:46:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-13 12:46:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,800 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 12:46:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 12:46:04,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:04,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655719357] [2024-11-13 12:46:04,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655719357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:04,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629499857] [2024-11-13 12:46:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:04,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:04,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:04,808 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:04,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 12:46:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:04,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 12:46:04,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:46:04,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 12:46:05,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629499857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:46:05,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:46:05,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-13 12:46:05,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213805826] [2024-11-13 12:46:05,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:05,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:46:05,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:05,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:46:05,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:46:05,029 INFO L87 Difference]: Start difference. First operand 999 states and 1329 transitions. Second operand has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-13 12:46:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:05,187 INFO L93 Difference]: Finished difference Result 2054 states and 2752 transitions. [2024-11-13 12:46:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:46:05,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2024-11-13 12:46:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:05,191 INFO L225 Difference]: With dead ends: 2054 [2024-11-13 12:46:05,191 INFO L226 Difference]: Without dead ends: 1058 [2024-11-13 12:46:05,194 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:46:05,194 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 114 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:05,195 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 414 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:46:05,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2024-11-13 12:46:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1022. [2024-11-13 12:46:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 927 states have (on average 1.2804746494066883) internal successors, (1187), 955 states have internal predecessors, (1187), 80 states have call successors, (80), 9 states have call predecessors, (80), 14 states have return successors, (100), 61 states have call predecessors, (100), 77 states have call successors, (100) [2024-11-13 12:46:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1367 transitions. [2024-11-13 12:46:05,279 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1367 transitions. Word has length 63 [2024-11-13 12:46:05,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:05,279 INFO L471 AbstractCegarLoop]: Abstraction has 1022 states and 1367 transitions. [2024-11-13 12:46:05,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 2 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-13 12:46:05,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1367 transitions. [2024-11-13 12:46:05,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-13 12:46:05,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:05,283 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:05,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 12:46:05,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-13 12:46:05,485 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:05,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:05,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1975913157, now seen corresponding path program 1 times [2024-11-13 12:46:05,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:05,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537962914] [2024-11-13 12:46:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:05,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:05,579 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:46:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:05,582 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:46:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:05,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:46:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:05,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-11-13 12:46:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:46:05,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:05,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537962914] [2024-11-13 12:46:05,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537962914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:05,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:05,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:46:05,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984026971] [2024-11-13 12:46:05,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:05,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:46:05,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:05,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:46:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:46:05,591 INFO L87 Difference]: Start difference. First operand 1022 states and 1367 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 12:46:05,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:05,700 INFO L93 Difference]: Finished difference Result 1283 states and 1720 transitions. [2024-11-13 12:46:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:46:05,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 65 [2024-11-13 12:46:05,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:05,704 INFO L225 Difference]: With dead ends: 1283 [2024-11-13 12:46:05,704 INFO L226 Difference]: Without dead ends: 1038 [2024-11-13 12:46:05,705 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:46:05,706 INFO L432 NwaCegarLoop]: 132 mSDtfsCounter, 0 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:05,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 243 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:46:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2024-11-13 12:46:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1038. [2024-11-13 12:46:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 943 states have (on average 1.2757158006362672) internal successors, (1203), 971 states have internal predecessors, (1203), 80 states have call successors, (80), 9 states have call predecessors, (80), 14 states have return successors, (100), 61 states have call predecessors, (100), 77 states have call successors, (100) [2024-11-13 12:46:05,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1383 transitions. [2024-11-13 12:46:05,776 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1383 transitions. Word has length 65 [2024-11-13 12:46:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:05,777 INFO L471 AbstractCegarLoop]: Abstraction has 1038 states and 1383 transitions. [2024-11-13 12:46:05,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 12:46:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1383 transitions. [2024-11-13 12:46:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 12:46:05,779 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:05,779 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:05,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-11-13 12:46:05,780 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:05,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:05,780 INFO L85 PathProgramCache]: Analyzing trace with hash 798326215, now seen corresponding path program 1 times [2024-11-13 12:46:05,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:05,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626857913] [2024-11-13 12:46:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:05,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:05,901 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-13 12:46:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:05,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 12:46:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:05,906 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:46:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:05,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-11-13 12:46:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:46:05,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:05,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626857913] [2024-11-13 12:46:05,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626857913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:05,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:05,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:46:05,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854669245] [2024-11-13 12:46:05,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:05,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:46:05,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:05,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:46:05,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:46:05,912 INFO L87 Difference]: Start difference. First operand 1038 states and 1383 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 12:46:06,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:06,096 INFO L93 Difference]: Finished difference Result 1111 states and 1481 transitions. [2024-11-13 12:46:06,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:46:06,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 66 [2024-11-13 12:46:06,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:06,100 INFO L225 Difference]: With dead ends: 1111 [2024-11-13 12:46:06,100 INFO L226 Difference]: Without dead ends: 1106 [2024-11-13 12:46:06,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:46:06,103 INFO L432 NwaCegarLoop]: 131 mSDtfsCounter, 9 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:06,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 613 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:46:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2024-11-13 12:46:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1037. [2024-11-13 12:46:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 942 states have (on average 1.2749469214437368) internal successors, (1201), 970 states have internal predecessors, (1201), 80 states have call successors, (80), 9 states have call predecessors, (80), 14 states have return successors, (100), 61 states have call predecessors, (100), 77 states have call successors, (100) [2024-11-13 12:46:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1381 transitions. [2024-11-13 12:46:06,181 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1381 transitions. Word has length 66 [2024-11-13 12:46:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:06,182 INFO L471 AbstractCegarLoop]: Abstraction has 1037 states and 1381 transitions. [2024-11-13 12:46:06,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 12:46:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1381 transitions. [2024-11-13 12:46:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 12:46:06,185 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:06,185 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:06,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-11-13 12:46:06,186 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:06,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1834303281, now seen corresponding path program 1 times [2024-11-13 12:46:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:06,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011870675] [2024-11-13 12:46:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:06,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 12:46:06,226 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 12:46:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 12:46:06,291 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-13 12:46:06,292 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-13 12:46:06,292 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-13 12:46:06,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-11-13 12:46:06,297 INFO L407 BasicCegarLoop]: Path program histogram: [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:06,347 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-13 12:46:06,352 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 12:46:06 BoogieIcfgContainer [2024-11-13 12:46:06,354 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-13 12:46:06,355 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 12:46:06,355 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 12:46:06,355 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 12:46:06,356 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:45:38" (3/4) ... [2024-11-13 12:46:06,358 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 12:46:06,359 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 12:46:06,359 INFO L158 Benchmark]: Toolchain (without parser) took 29325.84ms. Allocated memory was 117.4MB in the beginning and 268.4MB in the end (delta: 151.0MB). Free memory was 91.4MB in the beginning and 161.3MB in the end (delta: -69.9MB). Peak memory consumption was 86.0MB. Max. memory is 16.1GB. [2024-11-13 12:46:06,360 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 117.4MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:46:06,360 INFO L158 Benchmark]: CACSL2BoogieTranslator took 371.87ms. Allocated memory is still 117.4MB. Free memory was 91.4MB in the beginning and 77.2MB in the end (delta: 14.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 12:46:06,360 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.54ms. Allocated memory is still 117.4MB. Free memory was 77.2MB in the beginning and 75.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:46:06,360 INFO L158 Benchmark]: Boogie Preprocessor took 49.04ms. Allocated memory is still 117.4MB. Free memory was 75.6MB in the beginning and 73.6MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:46:06,363 INFO L158 Benchmark]: RCFGBuilder took 620.28ms. Allocated memory is still 117.4MB. Free memory was 73.6MB in the beginning and 51.7MB in the end (delta: 21.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-13 12:46:06,363 INFO L158 Benchmark]: TraceAbstraction took 28216.14ms. Allocated memory was 117.4MB in the beginning and 268.4MB in the end (delta: 151.0MB). Free memory was 50.9MB in the beginning and 161.4MB in the end (delta: -110.5MB). Peak memory consumption was 35.6MB. Max. memory is 16.1GB. [2024-11-13 12:46:06,363 INFO L158 Benchmark]: Witness Printer took 4.16ms. Allocated memory is still 268.4MB. Free memory was 161.4MB in the beginning and 161.3MB in the end (delta: 54.2kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 12:46:06,364 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 117.4MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 371.87ms. Allocated memory is still 117.4MB. Free memory was 91.4MB in the beginning and 77.2MB in the end (delta: 14.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.54ms. Allocated memory is still 117.4MB. Free memory was 77.2MB in the beginning and 75.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 49.04ms. Allocated memory is still 117.4MB. Free memory was 75.6MB in the beginning and 73.6MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 620.28ms. Allocated memory is still 117.4MB. Free memory was 73.6MB in the beginning and 51.7MB in the end (delta: 21.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 28216.14ms. Allocated memory was 117.4MB in the beginning and 268.4MB in the end (delta: 151.0MB). Free memory was 50.9MB in the beginning and 161.4MB in the end (delta: -110.5MB). Peak memory consumption was 35.6MB. Max. memory is 16.1GB. * Witness Printer took 4.16ms. Allocated memory is still 268.4MB. Free memory was 161.4MB in the beginning and 161.3MB in the end (delta: 54.2kB). Peak memory consumption was 8.4MB. 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 - UnprovableResult [Line: 18]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 114, overapproximation of bitwiseOr at line 111, overapproximation of bitwiseAnd at line 127. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add ; [L234] unsigned int zero ; [L235] int sa ; [L236] int sb ; [L237] int tmp ; [L238] int tmp___0 ; [L239] int tmp___1 ; [L240] int tmp___2 ; [L241] int tmp___3 ; [L242] int tmp___4 ; [L243] int tmp___5 ; [L244] int tmp___6 ; [L245] int tmp___7 ; [L246] int tmp___8 ; [L247] int tmp___9 ; [L248] int __retres23 ; VAL [ea=127, eb=127] [L252] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0] [L81] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, e=0] [L252] RET, EXPR base2flt(0, 0) VAL [ea=127, eb=127] [L252] zero = base2flt(0, 0) [L253] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=4328521728] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=4328521728, e=127, m=4328521728] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=4328521728, __retres4=4294967295, m=4328521728] [L81] return (__retres4); VAL [\old(e)=127, \old(m)=4328521728, \result=4294967295, m=4328521728] [L253] RET, EXPR base2flt(ma, ea) VAL [ea=127, eb=127, ma=4328521728, zero=0] [L253] a = base2flt(ma, ea) [L254] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554432] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, m=33554432] [L81] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, m=33554432] [L254] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, zero=0] [L254] b = base2flt(mb, eb) [L256] COND FALSE !(a < zero) VAL [a=4294967295, b=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, zero=0] [L259] COND TRUE a > zero [L260] tmp = 1 VAL [a=4294967295, b=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, tmp=1, zero=0] [L264] sa = tmp VAL [a=4294967295, b=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, sa=1, zero=0] [L266] COND FALSE !(b < zero) VAL [a=4294967295, b=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, sa=1, zero=0] [L269] COND TRUE b > zero [L270] tmp___0 = 1 VAL [a=4294967295, b=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, sa=1, tmp___0=1] [L274] sb = tmp___0 VAL [a=4294967295, b=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432, sa=1, sb=1] [L277] CALL addflt(a, b) [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; VAL [a=4294967295, b=4294967295] [L95] COND FALSE !(a < b) VAL [a=4294967295, b=4294967295] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 VAL [a=4294967295, b=4294967295, ea=127, ma=16777215] [L111] EXPR ma | (1U << 24U) VAL [a=4294967295, b=4294967295, ea=127] [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 VAL [a=4294967295, ea=127, eb=127, ma=-4261412865, mb=16777215] [L114] EXPR mb | (1U << 24U) VAL [a=4294967295, ea=127, eb=127, ma=-4261412865] [L114] mb = mb | (1U << 24U) [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L17] COND FALSE !(!(cond)) VAL [\old(cond)=1] [L115] RET __VERIFIER_assert(ea >= eb) VAL [a=4294967295, ea=127, eb=127, ma=-4261412865, mb=-4278190080] [L116] delta = ea - eb VAL [a=4294967295, delta=0, ea=127, ma=-4261412865, mb=-4278190080] [L117] COND FALSE !(!(delta < sizeof(mb) * 8)) VAL [a=4294967295, delta=0, ea=127, ma=-4261412865, mb=-4278190080] [L118] EXPR mb >> delta VAL [a=4294967295, ea=127, ma=-4261412865] [L118] mb = mb >> delta [L120] COND FALSE !(! mb) [L126] ma = ma + mb VAL [a=4294967295, ea=127, ma=-8539602945] [L127] ma & (1U << 25U) VAL [a=4294967295, ea=127, ma=-8539602945] [L127] COND FALSE !(ma & (1U << 25U)) [L140] CALL __VERIFIER_assert(ma < 1U << 25U) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0] [L18] reach_error() VAL [\old(cond)=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28.1s, OverallIterations: 40, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2407 SdHoareTripleChecker+Valid, 5.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2300 mSDsluCounter, 30871 SdHoareTripleChecker+Invalid, 4.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 25164 mSDsCounter, 132 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5243 IncrementalHoareTripleChecker+Invalid, 5375 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 132 mSolverCounterUnsat, 5707 mSDtfsCounter, 5243 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1821 GetRequests, 1482 SyntacticMatches, 3 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1077occurred in iteration=20, InterpolantAutomatonStates: 274, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.0s AutomataMinimizationTime, 39 MinimizatonAttempts, 3657 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 11.6s InterpolantComputationTime, 2901 NumberOfCodeBlocks, 2901 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 3185 ConstructedInterpolants, 0 QuantifiedInterpolants, 7826 SizeOfPredicates, 21 NumberOfNonLiveVariables, 2590 ConjunctsInSsa, 288 ConjunctsInUnsatCore, 64 InterpolantComputations, 34 PerfectInterpolantSequences, 944/1080 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-13 12:46:06,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd --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 c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:46:08,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:46:09,005 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-13 12:46:09,012 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:46:09,012 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:46:09,034 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:46:09,034 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:46:09,035 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:46:09,035 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:46:09,035 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:46:09,035 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:46:09,035 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:46:09,036 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:46:09,036 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:46:09,036 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:46:09,036 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:46:09,036 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 12:46:09,037 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 12:46:09,037 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 12:46:09,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:46:09,037 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 12:46:09,037 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:46:09,037 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 12:46:09,037 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 12:46:09,038 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 12:46:09,038 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:46:09,038 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 12:46:09,038 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 12:46:09,038 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 12:46:09,038 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:46:09,038 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:46:09,038 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:46:09,039 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:46:09,039 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:46:09,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:46:09,039 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:46:09,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:46:09,039 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 12:46:09,039 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-13 12:46:09,039 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 12:46:09,039 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:46:09,039 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:46:09,040 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:46:09,040 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:46:09,040 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd 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 -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2024-11-13 12:46:09,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:46:09,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:46:09,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:46:09,355 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:46:09,355 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:46:09,356 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c Unable to find full path for "g++" [2024-11-13 12:46:11,345 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:46:11,631 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:46:11,633 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2024-11-13 12:46:11,647 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/data/59f44dd18/7370822ddac149afae28eab7a4954bd5/FLAGe8723c2ab [2024-11-13 12:46:11,670 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/data/59f44dd18/7370822ddac149afae28eab7a4954bd5 [2024-11-13 12:46:11,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:46:11,674 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:46:11,677 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:46:11,677 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:46:11,681 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:46:11,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:46:11" (1/1) ... [2024-11-13 12:46:11,685 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12265aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:11, skipping insertion in model container [2024-11-13 12:46:11,685 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:46:11" (1/1) ... [2024-11-13 12:46:11,712 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:46:11,889 WARN L250 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_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2024-11-13 12:46:11,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:46:11,987 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:46:11,997 WARN L250 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_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2024-11-13 12:46:12,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:46:12,044 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:46:12,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12 WrapperNode [2024-11-13 12:46:12,045 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:46:12,046 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:46:12,046 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:46:12,046 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:46:12,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (1/1) ... [2024-11-13 12:46:12,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (1/1) ... [2024-11-13 12:46:12,080 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2024-11-13 12:46:12,081 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:46:12,082 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:46:12,082 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:46:12,082 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:46:12,090 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (1/1) ... [2024-11-13 12:46:12,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (1/1) ... [2024-11-13 12:46:12,093 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (1/1) ... [2024-11-13 12:46:12,104 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]. [2024-11-13 12:46:12,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (1/1) ... [2024-11-13 12:46:12,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (1/1) ... [2024-11-13 12:46:12,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (1/1) ... [2024-11-13 12:46:12,116 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (1/1) ... [2024-11-13 12:46:12,118 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (1/1) ... [2024-11-13 12:46:12,119 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (1/1) ... [2024-11-13 12:46:12,122 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:46:12,122 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:46:12,123 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:46:12,123 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:46:12,124 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (1/1) ... [2024-11-13 12:46:12,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:46:12,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:12,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 12:46:12,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 12:46:12,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 12:46:12,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-13 12:46:12,197 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-13 12:46:12,197 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-13 12:46:12,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:46:12,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:46:12,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-13 12:46:12,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-13 12:46:12,281 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:46:12,283 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:46:12,701 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-11-13 12:46:12,705 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:46:12,718 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:46:12,719 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 12:46:12,720 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:46:12 BoogieIcfgContainer [2024-11-13 12:46:12,720 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:46:12,723 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:46:12,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:46:12,728 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:46:12,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:46:11" (1/3) ... [2024-11-13 12:46:12,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abbeb8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:46:12, skipping insertion in model container [2024-11-13 12:46:12,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:46:12" (2/3) ... [2024-11-13 12:46:12,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abbeb8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:46:12, skipping insertion in model container [2024-11-13 12:46:12,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:46:12" (3/3) ... [2024-11-13 12:46:12,732 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2024-11-13 12:46:12,748 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:46:12,750 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_1-2a.c.cil.c that has 3 procedures, 72 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-13 12:46:12,814 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 12:46:12,831 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;@65111fd4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:46:12,831 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 12:46:12,835 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 12:46:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-13 12:46:12,842 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:12,842 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:12,843 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:12,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:12,848 INFO L85 PathProgramCache]: Analyzing trace with hash -815335319, now seen corresponding path program 1 times [2024-11-13 12:46:12,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:12,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231623243] [2024-11-13 12:46:12,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:12,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:12,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:12,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:12,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 12:46:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:12,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:46:12,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:46:13,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:46:13,279 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:13,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231623243] [2024-11-13 12:46:13,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231623243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:46:13,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:46:13,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-13 12:46:13,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256692773] [2024-11-13 12:46:13,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:13,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:46:13,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:13,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:46:13,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:46:13,309 INFO L87 Difference]: Start difference. First operand has 72 states, 60 states have (on average 1.6) internal successors, (96), 63 states have internal predecessors, (96), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:46:13,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:13,620 INFO L93 Difference]: Finished difference Result 175 states and 288 transitions. [2024-11-13 12:46:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:46:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-11-13 12:46:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:13,634 INFO L225 Difference]: With dead ends: 175 [2024-11-13 12:46:13,635 INFO L226 Difference]: Without dead ends: 100 [2024-11-13 12:46:13,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:46:13,645 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 33 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:13,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 623 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:46:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-13 12:46:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2024-11-13 12:46:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 83 states have (on average 1.4698795180722892) internal successors, (122), 86 states have internal predecessors, (122), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-13 12:46:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 147 transitions. [2024-11-13 12:46:13,706 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 147 transitions. Word has length 32 [2024-11-13 12:46:13,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:13,707 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 147 transitions. [2024-11-13 12:46:13,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:46:13,708 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 147 transitions. [2024-11-13 12:46:13,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 12:46:13,710 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:13,710 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1] [2024-11-13 12:46:13,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 12:46:13,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:13,911 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:13,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:13,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1972630329, now seen corresponding path program 1 times [2024-11-13 12:46:13,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:13,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162598723] [2024-11-13 12:46:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:13,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:13,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:13,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:13,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 12:46:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:13,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:46:13,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 12:46:14,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:46:14,293 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:14,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162598723] [2024-11-13 12:46:14,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162598723] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:46:14,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:46:14,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2024-11-13 12:46:14,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884946757] [2024-11-13 12:46:14,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:14,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:46:14,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:46:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:46:14,296 INFO L87 Difference]: Start difference. First operand 98 states and 147 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 12:46:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:14,653 INFO L93 Difference]: Finished difference Result 230 states and 365 transitions. [2024-11-13 12:46:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:46:14,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2024-11-13 12:46:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:14,657 INFO L225 Difference]: With dead ends: 230 [2024-11-13 12:46:14,657 INFO L226 Difference]: Without dead ends: 164 [2024-11-13 12:46:14,657 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:46:14,658 INFO L432 NwaCegarLoop]: 130 mSDtfsCounter, 64 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:14,659 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 972 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:46:14,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-13 12:46:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 126. [2024-11-13 12:46:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 105 states have (on average 1.380952380952381) internal successors, (145), 105 states have internal predecessors, (145), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (33), 20 states have call predecessors, (33), 15 states have call successors, (33) [2024-11-13 12:46:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 194 transitions. [2024-11-13 12:46:14,677 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 194 transitions. Word has length 36 [2024-11-13 12:46:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:14,677 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 194 transitions. [2024-11-13 12:46:14,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 12:46:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 194 transitions. [2024-11-13 12:46:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 12:46:14,695 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:14,695 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-11-13 12:46:14,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 12:46:14,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:14,897 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:14,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash -458910183, now seen corresponding path program 1 times [2024-11-13 12:46:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:14,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465037709] [2024-11-13 12:46:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:14,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:14,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:14,901 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:14,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 12:46:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:14,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 12:46:14,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 12:46:15,190 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:46:15,321 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:15,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465037709] [2024-11-13 12:46:15,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465037709] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:15,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:46:15,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2024-11-13 12:46:15,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492564649] [2024-11-13 12:46:15,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:15,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:46:15,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:15,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:46:15,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:46:15,323 INFO L87 Difference]: Start difference. First operand 126 states and 194 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:15,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:15,615 INFO L93 Difference]: Finished difference Result 256 states and 387 transitions. [2024-11-13 12:46:15,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:46:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-13 12:46:15,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:15,618 INFO L225 Difference]: With dead ends: 256 [2024-11-13 12:46:15,618 INFO L226 Difference]: Without dead ends: 201 [2024-11-13 12:46:15,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:46:15,619 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 39 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:15,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 431 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:46:15,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-13 12:46:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 159. [2024-11-13 12:46:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 138 states have (on average 1.3478260869565217) internal successors, (186), 132 states have internal predecessors, (186), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (33), 26 states have call predecessors, (33), 15 states have call successors, (33) [2024-11-13 12:46:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 235 transitions. [2024-11-13 12:46:15,638 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 235 transitions. Word has length 40 [2024-11-13 12:46:15,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:15,638 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 235 transitions. [2024-11-13 12:46:15,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 235 transitions. [2024-11-13 12:46:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 12:46:15,641 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:15,641 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2024-11-13 12:46:15,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 12:46:15,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:15,845 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:15,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash -401651881, now seen corresponding path program 1 times [2024-11-13 12:46:15,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:15,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961564313] [2024-11-13 12:46:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:15,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:15,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:15,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:15,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 12:46:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:15,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 12:46:15,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:46:15,996 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:15,996 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:15,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961564313] [2024-11-13 12:46:15,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961564313] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:15,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:15,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 12:46:15,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076434020] [2024-11-13 12:46:15,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:15,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:46:15,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:15,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:46:15,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:46:15,998 INFO L87 Difference]: Start difference. First operand 159 states and 235 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:16,123 INFO L93 Difference]: Finished difference Result 258 states and 385 transitions. [2024-11-13 12:46:16,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:46:16,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-13 12:46:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:16,125 INFO L225 Difference]: With dead ends: 258 [2024-11-13 12:46:16,125 INFO L226 Difference]: Without dead ends: 197 [2024-11-13 12:46:16,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:46:16,127 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 33 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:16,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 511 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:46:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-13 12:46:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2024-11-13 12:46:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 170 states have (on average 1.3529411764705883) internal successors, (230), 166 states have internal predecessors, (230), 20 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (37), 30 states have call predecessors, (37), 19 states have call successors, (37) [2024-11-13 12:46:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 287 transitions. [2024-11-13 12:46:16,172 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 287 transitions. Word has length 40 [2024-11-13 12:46:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:16,173 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 287 transitions. [2024-11-13 12:46:16,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 287 transitions. [2024-11-13 12:46:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 12:46:16,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:16,175 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:16,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 12:46:16,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:16,376 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:16,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:16,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1103669587, now seen corresponding path program 1 times [2024-11-13 12:46:16,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:16,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746983217] [2024-11-13 12:46:16,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:16,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:16,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:16,379 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:16,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 12:46:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:16,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:46:16,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:46:16,478 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:16,478 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:16,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746983217] [2024-11-13 12:46:16,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746983217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:16,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:16,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:46:16,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007472011] [2024-11-13 12:46:16,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:16,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:46:16,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:16,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:46:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:16,480 INFO L87 Difference]: Start difference. First operand 195 states and 287 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:16,513 INFO L93 Difference]: Finished difference Result 316 states and 466 transitions. [2024-11-13 12:46:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:46:16,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-13 12:46:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:16,515 INFO L225 Difference]: With dead ends: 316 [2024-11-13 12:46:16,516 INFO L226 Difference]: Without dead ends: 250 [2024-11-13 12:46:16,516 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:16,517 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 15 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:16,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 318 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:46:16,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-13 12:46:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2024-11-13 12:46:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 223 states have (on average 1.3228699551569507) internal successors, (295), 219 states have internal predecessors, (295), 22 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (39), 32 states have call predecessors, (39), 21 states have call successors, (39) [2024-11-13 12:46:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 356 transitions. [2024-11-13 12:46:16,548 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 356 transitions. Word has length 43 [2024-11-13 12:46:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:16,548 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 356 transitions. [2024-11-13 12:46:16,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 356 transitions. [2024-11-13 12:46:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 12:46:16,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:16,551 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:16,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 12:46:16,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:16,752 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:16,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:16,752 INFO L85 PathProgramCache]: Analyzing trace with hash 508624669, now seen corresponding path program 1 times [2024-11-13 12:46:16,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:16,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742176197] [2024-11-13 12:46:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:16,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:16,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:16,754 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:16,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 12:46:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:16,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:46:16,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:46:16,860 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:16,860 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:16,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742176197] [2024-11-13 12:46:16,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742176197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:16,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:16,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:46:16,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634658169] [2024-11-13 12:46:16,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:16,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:46:16,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:16,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:46:16,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:16,862 INFO L87 Difference]: Start difference. First operand 250 states and 356 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:46:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:16,930 INFO L93 Difference]: Finished difference Result 436 states and 617 transitions. [2024-11-13 12:46:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:46:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-13 12:46:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:16,932 INFO L225 Difference]: With dead ends: 436 [2024-11-13 12:46:16,932 INFO L226 Difference]: Without dead ends: 189 [2024-11-13 12:46:16,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:46:16,934 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 26 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:16,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 258 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:46:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-13 12:46:16,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 177. [2024-11-13 12:46:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 157 states have (on average 1.286624203821656) internal successors, (202), 158 states have internal predecessors, (202), 14 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (25), 18 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-13 12:46:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 241 transitions. [2024-11-13 12:46:16,948 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 241 transitions. Word has length 43 [2024-11-13 12:46:16,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:16,948 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 241 transitions. [2024-11-13 12:46:16,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:46:16,949 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 241 transitions. [2024-11-13 12:46:16,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:46:16,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:16,950 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:16,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 12:46:17,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:17,155 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:17,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:17,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1829172874, now seen corresponding path program 1 times [2024-11-13 12:46:17,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:17,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429372093] [2024-11-13 12:46:17,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:17,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:17,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:17,157 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:17,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 12:46:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:17,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:46:17,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:46:17,235 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:17,236 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:17,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429372093] [2024-11-13 12:46:17,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429372093] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:17,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:17,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:46:17,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371300712] [2024-11-13 12:46:17,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:17,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:46:17,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:46:17,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:17,237 INFO L87 Difference]: Start difference. First operand 177 states and 241 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:17,259 INFO L93 Difference]: Finished difference Result 188 states and 253 transitions. [2024-11-13 12:46:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:46:17,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-13 12:46:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:17,261 INFO L225 Difference]: With dead ends: 188 [2024-11-13 12:46:17,261 INFO L226 Difference]: Without dead ends: 181 [2024-11-13 12:46:17,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:17,262 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:17,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:46:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-13 12:46:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-13 12:46:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 161 states have (on average 1.279503105590062) internal successors, (206), 162 states have internal predecessors, (206), 14 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (25), 18 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-13 12:46:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 245 transitions. [2024-11-13 12:46:17,274 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 245 transitions. Word has length 44 [2024-11-13 12:46:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:17,274 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 245 transitions. [2024-11-13 12:46:17,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:17,275 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 245 transitions. [2024-11-13 12:46:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:46:17,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:17,276 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:17,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 12:46:17,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:17,476 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:17,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:17,477 INFO L85 PathProgramCache]: Analyzing trace with hash -690787060, now seen corresponding path program 1 times [2024-11-13 12:46:17,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:17,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518645975] [2024-11-13 12:46:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:17,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:17,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:17,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:17,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 12:46:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:17,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 12:46:17,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:46:17,577 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:17,577 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:17,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518645975] [2024-11-13 12:46:17,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518645975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:17,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:17,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:46:17,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640404837] [2024-11-13 12:46:17,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:17,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:46:17,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:46:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:46:17,579 INFO L87 Difference]: Start difference. First operand 181 states and 245 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:17,615 INFO L93 Difference]: Finished difference Result 188 states and 251 transitions. [2024-11-13 12:46:17,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:46:17,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-13 12:46:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:17,619 INFO L225 Difference]: With dead ends: 188 [2024-11-13 12:46:17,619 INFO L226 Difference]: Without dead ends: 181 [2024-11-13 12:46:17,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:46:17,620 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 3 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:17,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 379 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:46:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-13 12:46:17,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2024-11-13 12:46:17,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 157 states have (on average 1.267515923566879) internal successors, (199), 158 states have internal predecessors, (199), 14 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (25), 18 states have call predecessors, (25), 13 states have call successors, (25) [2024-11-13 12:46:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 238 transitions. [2024-11-13 12:46:17,633 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 238 transitions. Word has length 44 [2024-11-13 12:46:17,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:17,634 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 238 transitions. [2024-11-13 12:46:17,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:17,634 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 238 transitions. [2024-11-13 12:46:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:46:17,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:17,635 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:17,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 12:46:17,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:17,836 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:17,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:17,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1875958711, now seen corresponding path program 2 times [2024-11-13 12:46:17,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:17,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345545259] [2024-11-13 12:46:17,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:46:17,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:17,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:17,838 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:17,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 12:46:17,893 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 12:46:17,893 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:46:17,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 12:46:17,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:46:18,088 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:18,088 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:18,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345545259] [2024-11-13 12:46:18,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345545259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:18,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:18,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 12:46:18,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930932904] [2024-11-13 12:46:18,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:18,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:46:18,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:46:18,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:46:18,090 INFO L87 Difference]: Start difference. First operand 177 states and 238 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:18,438 INFO L93 Difference]: Finished difference Result 303 states and 410 transitions. [2024-11-13 12:46:18,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:46:18,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-13 12:46:18,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:18,441 INFO L225 Difference]: With dead ends: 303 [2024-11-13 12:46:18,441 INFO L226 Difference]: Without dead ends: 264 [2024-11-13 12:46:18,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:46:18,442 INFO L432 NwaCegarLoop]: 126 mSDtfsCounter, 57 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:18,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1183 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:46:18,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-13 12:46:18,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2024-11-13 12:46:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 233 states have (on average 1.2789699570815452) internal successors, (298), 232 states have internal predecessors, (298), 20 states have call successors, (20), 3 states have call predecessors, (20), 6 states have return successors, (31), 27 states have call predecessors, (31), 19 states have call successors, (31) [2024-11-13 12:46:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 349 transitions. [2024-11-13 12:46:18,458 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 349 transitions. Word has length 44 [2024-11-13 12:46:18,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:18,459 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 349 transitions. [2024-11-13 12:46:18,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:18,459 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 349 transitions. [2024-11-13 12:46:18,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:46:18,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:18,460 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:18,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 12:46:18,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:18,661 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:18,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash -957401979, now seen corresponding path program 1 times [2024-11-13 12:46:18,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:18,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155911683] [2024-11-13 12:46:18,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:18,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:18,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:18,663 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:18,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 12:46:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:18,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 12:46:18,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:46:18,796 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:46:18,859 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:18,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155911683] [2024-11-13 12:46:18,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155911683] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:46:18,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:46:18,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-13 12:46:18,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441614] [2024-11-13 12:46:18,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:18,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:46:18,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:18,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:46:18,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:46:18,860 INFO L87 Difference]: Start difference. First operand 260 states and 349 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:46:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:19,019 INFO L93 Difference]: Finished difference Result 437 states and 612 transitions. [2024-11-13 12:46:19,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:46:19,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-11-13 12:46:19,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:19,022 INFO L225 Difference]: With dead ends: 437 [2024-11-13 12:46:19,023 INFO L226 Difference]: Without dead ends: 351 [2024-11-13 12:46:19,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:46:19,025 INFO L432 NwaCegarLoop]: 126 mSDtfsCounter, 46 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:19,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 690 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:46:19,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2024-11-13 12:46:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 347. [2024-11-13 12:46:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 310 states have (on average 1.3) internal successors, (403), 312 states have internal predecessors, (403), 30 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-13 12:46:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 474 transitions. [2024-11-13 12:46:19,051 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 474 transitions. Word has length 44 [2024-11-13 12:46:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:19,052 INFO L471 AbstractCegarLoop]: Abstraction has 347 states and 474 transitions. [2024-11-13 12:46:19,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:46:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 474 transitions. [2024-11-13 12:46:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:46:19,053 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:19,053 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:19,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 12:46:19,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:19,257 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:19,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash -900143677, now seen corresponding path program 1 times [2024-11-13 12:46:19,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:19,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472309712] [2024-11-13 12:46:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:19,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:19,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:19,260 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:19,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 12:46:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:19,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:46:19,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:46:19,465 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:19,709 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:19,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472309712] [2024-11-13 12:46:19,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472309712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:19,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2059592292] [2024-11-13 12:46:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:19,710 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 12:46:19,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 12:46:19,722 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 12:46:19,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-13 12:46:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:19,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:46:19,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:46:19,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:20,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2059592292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:20,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:46:20,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-13 12:46:20,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649959201] [2024-11-13 12:46:20,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:20,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 12:46:20,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:20,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 12:46:20,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:46:20,015 INFO L87 Difference]: Start difference. First operand 347 states and 474 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:46:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:20,322 INFO L93 Difference]: Finished difference Result 361 states and 486 transitions. [2024-11-13 12:46:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:46:20,323 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-11-13 12:46:20,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:20,325 INFO L225 Difference]: With dead ends: 361 [2024-11-13 12:46:20,325 INFO L226 Difference]: Without dead ends: 359 [2024-11-13 12:46:20,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:46:20,326 INFO L432 NwaCegarLoop]: 138 mSDtfsCounter, 48 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:20,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1143 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:46:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2024-11-13 12:46:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 355. [2024-11-13 12:46:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 316 states have (on average 1.2943037974683544) internal successors, (409), 318 states have internal predecessors, (409), 30 states have call successors, (30), 5 states have call predecessors, (30), 8 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-13 12:46:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 480 transitions. [2024-11-13 12:46:20,347 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 480 transitions. Word has length 44 [2024-11-13 12:46:20,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:20,347 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 480 transitions. [2024-11-13 12:46:20,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:46:20,348 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 480 transitions. [2024-11-13 12:46:20,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:46:20,349 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:20,349 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:20,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 12:46:20,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2024-11-13 12:46:20,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 12:46:20,754 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:20,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:20,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1071126839, now seen corresponding path program 1 times [2024-11-13 12:46:20,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:20,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756358983] [2024-11-13 12:46:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:20,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:20,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:20,756 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:20,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 12:46:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:20,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:46:20,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:46:20,930 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:20,930 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:20,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756358983] [2024-11-13 12:46:20,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756358983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:20,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:20,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:46:20,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306080990] [2024-11-13 12:46:20,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:20,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:46:20,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:20,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:46:20,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:46:20,931 INFO L87 Difference]: Start difference. First operand 355 states and 480 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:21,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:21,069 INFO L93 Difference]: Finished difference Result 376 states and 505 transitions. [2024-11-13 12:46:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:46:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-13 12:46:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:21,071 INFO L225 Difference]: With dead ends: 376 [2024-11-13 12:46:21,071 INFO L226 Difference]: Without dead ends: 374 [2024-11-13 12:46:21,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:46:21,072 INFO L432 NwaCegarLoop]: 99 mSDtfsCounter, 3 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:21,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 470 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:46:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-11-13 12:46:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 363. [2024-11-13 12:46:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 321 states have (on average 1.2959501557632398) internal successors, (416), 325 states have internal predecessors, (416), 32 states have call successors, (32), 6 states have call predecessors, (32), 9 states have return successors, (43), 37 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-13 12:46:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 491 transitions. [2024-11-13 12:46:21,100 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 491 transitions. Word has length 44 [2024-11-13 12:46:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:21,100 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 491 transitions. [2024-11-13 12:46:21,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 491 transitions. [2024-11-13 12:46:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:46:21,102 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:21,102 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:21,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 12:46:21,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:21,307 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:21,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1013868537, now seen corresponding path program 1 times [2024-11-13 12:46:21,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:21,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498575253] [2024-11-13 12:46:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:21,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:21,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:21,311 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:21,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 12:46:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:21,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 12:46:21,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:46:21,478 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:21,478 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:21,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498575253] [2024-11-13 12:46:21,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498575253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:21,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:21,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:46:21,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751926863] [2024-11-13 12:46:21,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:21,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:46:21,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:46:21,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:46:21,480 INFO L87 Difference]: Start difference. First operand 363 states and 491 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:21,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:21,590 INFO L93 Difference]: Finished difference Result 369 states and 496 transitions. [2024-11-13 12:46:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:46:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-13 12:46:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:21,593 INFO L225 Difference]: With dead ends: 369 [2024-11-13 12:46:21,593 INFO L226 Difference]: Without dead ends: 367 [2024-11-13 12:46:21,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:46:21,594 INFO L432 NwaCegarLoop]: 94 mSDtfsCounter, 3 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:21,594 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 450 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:46:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-11-13 12:46:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 359. [2024-11-13 12:46:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 319 states have (on average 1.29153605015674) internal successors, (412), 321 states have internal predecessors, (412), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-13 12:46:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 483 transitions. [2024-11-13 12:46:21,618 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 483 transitions. Word has length 44 [2024-11-13 12:46:21,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:21,621 INFO L471 AbstractCegarLoop]: Abstraction has 359 states and 483 transitions. [2024-11-13 12:46:21,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 483 transitions. [2024-11-13 12:46:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-13 12:46:21,623 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:21,623 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:21,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 12:46:21,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:21,824 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:21,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:21,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1800320811, now seen corresponding path program 1 times [2024-11-13 12:46:21,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:21,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714959823] [2024-11-13 12:46:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:21,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:21,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:21,827 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:21,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 12:46:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:21,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:46:21,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:21,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:46:21,916 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:21,916 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:21,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714959823] [2024-11-13 12:46:21,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714959823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:21,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:21,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:46:21,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118496471] [2024-11-13 12:46:21,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:21,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:46:21,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:21,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:46:21,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:21,918 INFO L87 Difference]: Start difference. First operand 359 states and 483 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:21,967 INFO L93 Difference]: Finished difference Result 591 states and 816 transitions. [2024-11-13 12:46:21,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:46:21,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-13 12:46:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:21,973 INFO L225 Difference]: With dead ends: 591 [2024-11-13 12:46:21,973 INFO L226 Difference]: Without dead ends: 499 [2024-11-13 12:46:21,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:21,974 INFO L432 NwaCegarLoop]: 111 mSDtfsCounter, 28 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:21,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 313 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:46:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-11-13 12:46:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 412. [2024-11-13 12:46:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 368 states have (on average 1.2907608695652173) internal successors, (475), 368 states have internal predecessors, (475), 34 states have call successors, (34), 6 states have call predecessors, (34), 9 states have return successors, (45), 41 states have call predecessors, (45), 33 states have call successors, (45) [2024-11-13 12:46:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 554 transitions. [2024-11-13 12:46:22,007 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 554 transitions. Word has length 45 [2024-11-13 12:46:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:22,007 INFO L471 AbstractCegarLoop]: Abstraction has 412 states and 554 transitions. [2024-11-13 12:46:22,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 554 transitions. [2024-11-13 12:46:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 12:46:22,009 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:22,009 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:22,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 12:46:22,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:22,210 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:22,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:22,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2009190453, now seen corresponding path program 1 times [2024-11-13 12:46:22,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:22,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352262951] [2024-11-13 12:46:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:22,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:22,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:22,213 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:22,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 12:46:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:22,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 12:46:22,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:46:22,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:46:22,536 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352262951] [2024-11-13 12:46:22,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352262951] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:22,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:46:22,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-13 12:46:22,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238066573] [2024-11-13 12:46:22,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:22,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:46:22,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:22,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:46:22,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:46:22,538 INFO L87 Difference]: Start difference. First operand 412 states and 554 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:22,800 INFO L93 Difference]: Finished difference Result 603 states and 828 transitions. [2024-11-13 12:46:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:46:22,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-13 12:46:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:22,804 INFO L225 Difference]: With dead ends: 603 [2024-11-13 12:46:22,804 INFO L226 Difference]: Without dead ends: 563 [2024-11-13 12:46:22,806 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:46:22,807 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 23 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:22,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 368 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:46:22,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2024-11-13 12:46:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 444. [2024-11-13 12:46:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 394 states have (on average 1.284263959390863) internal successors, (506), 394 states have internal predecessors, (506), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (51), 47 states have call predecessors, (51), 39 states have call successors, (51) [2024-11-13 12:46:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 597 transitions. [2024-11-13 12:46:22,843 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 597 transitions. Word has length 48 [2024-11-13 12:46:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:22,844 INFO L471 AbstractCegarLoop]: Abstraction has 444 states and 597 transitions. [2024-11-13 12:46:22,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 597 transitions. [2024-11-13 12:46:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-13 12:46:22,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:22,846 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:22,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 12:46:23,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:23,046 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:23,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:23,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1584712265, now seen corresponding path program 1 times [2024-11-13 12:46:23,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:23,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941904772] [2024-11-13 12:46:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:23,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:23,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:23,050 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:23,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 12:46:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:23,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:46:23,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:46:23,132 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:23,132 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:23,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941904772] [2024-11-13 12:46:23,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941904772] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:23,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:23,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:46:23,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868347185] [2024-11-13 12:46:23,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:23,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:46:23,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:23,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:46:23,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:23,133 INFO L87 Difference]: Start difference. First operand 444 states and 597 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:23,168 INFO L93 Difference]: Finished difference Result 463 states and 618 transitions. [2024-11-13 12:46:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:46:23,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-13 12:46:23,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:23,170 INFO L225 Difference]: With dead ends: 463 [2024-11-13 12:46:23,171 INFO L226 Difference]: Without dead ends: 419 [2024-11-13 12:46:23,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:23,173 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 0 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:23,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:46:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2024-11-13 12:46:23,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2024-11-13 12:46:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 369 states have (on average 1.2872628726287263) internal successors, (475), 370 states have internal predecessors, (475), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (49), 46 states have call predecessors, (49), 39 states have call successors, (49) [2024-11-13 12:46:23,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 564 transitions. [2024-11-13 12:46:23,205 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 564 transitions. Word has length 48 [2024-11-13 12:46:23,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:23,205 INFO L471 AbstractCegarLoop]: Abstraction has 419 states and 564 transitions. [2024-11-13 12:46:23,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:23,205 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 564 transitions. [2024-11-13 12:46:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 12:46:23,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:23,207 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:23,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-13 12:46:23,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:23,408 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:23,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:23,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1246378667, now seen corresponding path program 1 times [2024-11-13 12:46:23,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:23,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399144060] [2024-11-13 12:46:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:23,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:23,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:23,412 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:23,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 12:46:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:23,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 12:46:23,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 12:46:23,493 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:23,493 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:23,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399144060] [2024-11-13 12:46:23,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399144060] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:23,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:23,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:46:23,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987173867] [2024-11-13 12:46:23,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:23,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:46:23,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:23,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:46:23,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:23,496 INFO L87 Difference]: Start difference. First operand 419 states and 564 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:23,582 INFO L93 Difference]: Finished difference Result 544 states and 726 transitions. [2024-11-13 12:46:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:46:23,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-13 12:46:23,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:23,585 INFO L225 Difference]: With dead ends: 544 [2024-11-13 12:46:23,585 INFO L226 Difference]: Without dead ends: 513 [2024-11-13 12:46:23,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:46:23,586 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 40 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:23,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 255 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:46:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2024-11-13 12:46:23,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 423. [2024-11-13 12:46:23,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 373 states have (on average 1.2815013404825737) internal successors, (478), 374 states have internal predecessors, (478), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (49), 46 states have call predecessors, (49), 39 states have call successors, (49) [2024-11-13 12:46:23,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 567 transitions. [2024-11-13 12:46:23,617 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 567 transitions. Word has length 49 [2024-11-13 12:46:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:23,618 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 567 transitions. [2024-11-13 12:46:23,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 567 transitions. [2024-11-13 12:46:23,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 12:46:23,619 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:23,619 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:23,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 12:46:23,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:23,820 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:23,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1480312799, now seen corresponding path program 1 times [2024-11-13 12:46:23,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:23,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562225114] [2024-11-13 12:46:23,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:23,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:23,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:23,822 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:23,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 12:46:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:23,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 12:46:23,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:46:24,072 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:24,072 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:24,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562225114] [2024-11-13 12:46:24,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562225114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:24,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:24,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 12:46:24,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616040166] [2024-11-13 12:46:24,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:24,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:46:24,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:24,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:46:24,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:46:24,074 INFO L87 Difference]: Start difference. First operand 423 states and 567 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:24,540 INFO L93 Difference]: Finished difference Result 474 states and 635 transitions. [2024-11-13 12:46:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:46:24,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-13 12:46:24,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:24,543 INFO L225 Difference]: With dead ends: 474 [2024-11-13 12:46:24,543 INFO L226 Difference]: Without dead ends: 447 [2024-11-13 12:46:24,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:46:24,544 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 68 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:24,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 870 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:46:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2024-11-13 12:46:24,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2024-11-13 12:46:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 389 states have (on average 1.2802056555269923) internal successors, (498), 391 states have internal predecessors, (498), 42 states have call successors, (42), 6 states have call predecessors, (42), 9 states have return successors, (51), 48 states have call predecessors, (51), 41 states have call successors, (51) [2024-11-13 12:46:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 591 transitions. [2024-11-13 12:46:24,574 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 591 transitions. Word has length 49 [2024-11-13 12:46:24,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:24,574 INFO L471 AbstractCegarLoop]: Abstraction has 441 states and 591 transitions. [2024-11-13 12:46:24,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:24,574 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 591 transitions. [2024-11-13 12:46:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 12:46:24,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:24,576 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:24,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 12:46:24,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:24,781 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:24,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:24,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1559293285, now seen corresponding path program 1 times [2024-11-13 12:46:24,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:24,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996766337] [2024-11-13 12:46:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:24,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:24,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:24,784 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:24,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 12:46:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:24,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 12:46:24,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:46:24,873 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:24,873 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:24,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996766337] [2024-11-13 12:46:24,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996766337] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:24,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:24,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 12:46:24,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772518771] [2024-11-13 12:46:24,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:24,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:46:24,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:24,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:46:24,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:46:24,874 INFO L87 Difference]: Start difference. First operand 441 states and 591 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:25,004 INFO L93 Difference]: Finished difference Result 524 states and 700 transitions. [2024-11-13 12:46:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:46:25,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-13 12:46:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:25,007 INFO L225 Difference]: With dead ends: 524 [2024-11-13 12:46:25,007 INFO L226 Difference]: Without dead ends: 458 [2024-11-13 12:46:25,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:46:25,008 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 58 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:25,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 356 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:46:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2024-11-13 12:46:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 423. [2024-11-13 12:46:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 373 states have (on average 1.2707774798927614) internal successors, (474), 374 states have internal predecessors, (474), 40 states have call successors, (40), 6 states have call predecessors, (40), 9 states have return successors, (49), 46 states have call predecessors, (49), 39 states have call successors, (49) [2024-11-13 12:46:25,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 563 transitions. [2024-11-13 12:46:25,037 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 563 transitions. Word has length 49 [2024-11-13 12:46:25,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:25,037 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 563 transitions. [2024-11-13 12:46:25,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:25,038 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 563 transitions. [2024-11-13 12:46:25,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 12:46:25,039 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:25,039 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:25,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-13 12:46:25,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:25,243 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:25,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:25,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1760051637, now seen corresponding path program 1 times [2024-11-13 12:46:25,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:25,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818020882] [2024-11-13 12:46:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:25,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:25,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:25,247 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:25,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 12:46:25,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:25,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:46:25,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:46:25,502 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:25,502 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:25,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818020882] [2024-11-13 12:46:25,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818020882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:25,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:25,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 12:46:25,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768274948] [2024-11-13 12:46:25,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:25,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:46:25,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:46:25,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:46:25,503 INFO L87 Difference]: Start difference. First operand 423 states and 563 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:25,858 INFO L93 Difference]: Finished difference Result 501 states and 667 transitions. [2024-11-13 12:46:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 12:46:25,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-13 12:46:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:25,861 INFO L225 Difference]: With dead ends: 501 [2024-11-13 12:46:25,861 INFO L226 Difference]: Without dead ends: 462 [2024-11-13 12:46:25,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:46:25,862 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 64 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:25,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 624 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:46:25,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2024-11-13 12:46:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 449. [2024-11-13 12:46:25,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 395 states have (on average 1.2582278481012659) internal successors, (497), 398 states have internal predecessors, (497), 44 states have call successors, (44), 6 states have call predecessors, (44), 9 states have return successors, (52), 49 states have call predecessors, (52), 42 states have call successors, (52) [2024-11-13 12:46:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 593 transitions. [2024-11-13 12:46:25,895 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 593 transitions. Word has length 50 [2024-11-13 12:46:25,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:25,895 INFO L471 AbstractCegarLoop]: Abstraction has 449 states and 593 transitions. [2024-11-13 12:46:25,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:25,895 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 593 transitions. [2024-11-13 12:46:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 12:46:25,896 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:25,897 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:25,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-13 12:46:26,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:26,098 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:26,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:26,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1902267513, now seen corresponding path program 1 times [2024-11-13 12:46:26,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:26,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657445303] [2024-11-13 12:46:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:26,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:26,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:26,101 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:26,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 12:46:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:26,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 12:46:26,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:46:26,234 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:26,234 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:26,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657445303] [2024-11-13 12:46:26,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657445303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:26,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:26,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-13 12:46:26,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778133278] [2024-11-13 12:46:26,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:26,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:46:26,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:26,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:46:26,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:46:26,238 INFO L87 Difference]: Start difference. First operand 449 states and 593 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:26,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:26,499 INFO L93 Difference]: Finished difference Result 586 states and 780 transitions. [2024-11-13 12:46:26,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:46:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-13 12:46:26,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:26,502 INFO L225 Difference]: With dead ends: 586 [2024-11-13 12:46:26,502 INFO L226 Difference]: Without dead ends: 562 [2024-11-13 12:46:26,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:46:26,503 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 27 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:26,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 490 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:46:26,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2024-11-13 12:46:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 466. [2024-11-13 12:46:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 408 states have (on average 1.267156862745098) internal successors, (517), 413 states have internal predecessors, (517), 48 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (56), 52 states have call predecessors, (56), 46 states have call successors, (56) [2024-11-13 12:46:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 621 transitions. [2024-11-13 12:46:26,535 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 621 transitions. Word has length 50 [2024-11-13 12:46:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:26,535 INFO L471 AbstractCegarLoop]: Abstraction has 466 states and 621 transitions. [2024-11-13 12:46:26,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 621 transitions. [2024-11-13 12:46:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 12:46:26,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:26,537 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:26,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 12:46:26,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:26,741 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:26,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:26,741 INFO L85 PathProgramCache]: Analyzing trace with hash 244905453, now seen corresponding path program 1 times [2024-11-13 12:46:26,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:26,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912725546] [2024-11-13 12:46:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:26,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:26,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:26,744 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:26,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 12:46:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:26,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:46:26,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:46:26,839 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:26,840 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:26,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912725546] [2024-11-13 12:46:26,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912725546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:26,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:26,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:46:26,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398890522] [2024-11-13 12:46:26,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:26,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:46:26,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:26,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:46:26,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:26,842 INFO L87 Difference]: Start difference. First operand 466 states and 621 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:26,895 INFO L93 Difference]: Finished difference Result 513 states and 680 transitions. [2024-11-13 12:46:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:46:26,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-13 12:46:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:26,900 INFO L225 Difference]: With dead ends: 513 [2024-11-13 12:46:26,900 INFO L226 Difference]: Without dead ends: 466 [2024-11-13 12:46:26,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:26,902 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 26 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:26,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 278 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:46:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2024-11-13 12:46:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 466. [2024-11-13 12:46:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 408 states have (on average 1.2156862745098038) internal successors, (496), 413 states have internal predecessors, (496), 48 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (56), 52 states have call predecessors, (56), 46 states have call successors, (56) [2024-11-13 12:46:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 600 transitions. [2024-11-13 12:46:26,933 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 600 transitions. Word has length 50 [2024-11-13 12:46:26,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:26,933 INFO L471 AbstractCegarLoop]: Abstraction has 466 states and 600 transitions. [2024-11-13 12:46:26,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:26,933 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 600 transitions. [2024-11-13 12:46:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 12:46:26,935 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:26,935 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:26,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 12:46:27,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:27,135 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:27,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:27,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1832344175, now seen corresponding path program 1 times [2024-11-13 12:46:27,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:27,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734322553] [2024-11-13 12:46:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:27,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:27,138 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:27,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 12:46:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:27,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 12:46:27,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:46:27,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:46:27,357 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:27,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734322553] [2024-11-13 12:46:27,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734322553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:46:27,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:46:27,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-13 12:46:27,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593398700] [2024-11-13 12:46:27,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:27,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:46:27,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:27,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:46:27,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:46:27,358 INFO L87 Difference]: Start difference. First operand 466 states and 600 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:46:27,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:27,467 INFO L93 Difference]: Finished difference Result 494 states and 633 transitions. [2024-11-13 12:46:27,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:46:27,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-11-13 12:46:27,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:27,470 INFO L225 Difference]: With dead ends: 494 [2024-11-13 12:46:27,470 INFO L226 Difference]: Without dead ends: 458 [2024-11-13 12:46:27,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:46:27,471 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 20 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:27,471 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 575 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:46:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2024-11-13 12:46:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 442. [2024-11-13 12:46:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 384 states have (on average 1.21875) internal successors, (468), 390 states have internal predecessors, (468), 48 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (56), 51 states have call predecessors, (56), 46 states have call successors, (56) [2024-11-13 12:46:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 572 transitions. [2024-11-13 12:46:27,510 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 572 transitions. Word has length 50 [2024-11-13 12:46:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:27,510 INFO L471 AbstractCegarLoop]: Abstraction has 442 states and 572 transitions. [2024-11-13 12:46:27,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 12:46:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 572 transitions. [2024-11-13 12:46:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 12:46:27,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:27,512 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:27,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 12:46:27,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:27,712 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:27,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:27,712 INFO L85 PathProgramCache]: Analyzing trace with hash 305677735, now seen corresponding path program 1 times [2024-11-13 12:46:27,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:27,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063952405] [2024-11-13 12:46:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:27,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:27,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:27,716 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:27,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 12:46:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:27,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:46:27,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:46:27,794 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:27,794 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:27,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063952405] [2024-11-13 12:46:27,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063952405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:27,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:27,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:46:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418745714] [2024-11-13 12:46:27,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:27,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:46:27,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:27,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:46:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:27,795 INFO L87 Difference]: Start difference. First operand 442 states and 572 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:27,827 INFO L93 Difference]: Finished difference Result 451 states and 580 transitions. [2024-11-13 12:46:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:46:27,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-13 12:46:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:27,830 INFO L225 Difference]: With dead ends: 451 [2024-11-13 12:46:27,830 INFO L226 Difference]: Without dead ends: 404 [2024-11-13 12:46:27,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:46:27,831 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 0 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:27,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 279 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:46:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2024-11-13 12:46:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 367. [2024-11-13 12:46:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 319 states have (on average 1.2163009404388714) internal successors, (388), 324 states have internal predecessors, (388), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (43), 40 states have call predecessors, (43), 36 states have call successors, (43) [2024-11-13 12:46:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 469 transitions. [2024-11-13 12:46:27,857 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 469 transitions. Word has length 52 [2024-11-13 12:46:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:27,857 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 469 transitions. [2024-11-13 12:46:27,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:27,857 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 469 transitions. [2024-11-13 12:46:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-13 12:46:27,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:27,858 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:27,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 12:46:28,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:28,059 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:28,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:28,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1511551533, now seen corresponding path program 1 times [2024-11-13 12:46:28,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:28,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1095560994] [2024-11-13 12:46:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:28,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:28,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:28,061 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:28,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 12:46:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:28,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 12:46:28,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:46:28,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:46:28,407 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:28,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095560994] [2024-11-13 12:46:28,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095560994] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:28,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:46:28,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-13 12:46:28,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123047303] [2024-11-13 12:46:28,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:28,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:46:28,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:28,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:46:28,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:46:28,408 INFO L87 Difference]: Start difference. First operand 367 states and 469 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:28,657 INFO L93 Difference]: Finished difference Result 448 states and 568 transitions. [2024-11-13 12:46:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:46:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-13 12:46:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:28,660 INFO L225 Difference]: With dead ends: 448 [2024-11-13 12:46:28,660 INFO L226 Difference]: Without dead ends: 387 [2024-11-13 12:46:28,660 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:46:28,661 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 24 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:28,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 356 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:46:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-11-13 12:46:28,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 357. [2024-11-13 12:46:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 309 states have (on average 1.2135922330097086) internal successors, (375), 313 states have internal predecessors, (375), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-13 12:46:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 454 transitions. [2024-11-13 12:46:28,698 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 454 transitions. Word has length 52 [2024-11-13 12:46:28,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:28,698 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 454 transitions. [2024-11-13 12:46:28,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 12:46:28,698 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 454 transitions. [2024-11-13 12:46:28,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 12:46:28,701 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:28,701 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:28,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 12:46:28,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:28,902 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:28,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:28,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2017389868, now seen corresponding path program 1 times [2024-11-13 12:46:28,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:28,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367683466] [2024-11-13 12:46:28,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:28,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:28,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:28,904 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:28,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 12:46:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:28,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 12:46:28,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:46:29,224 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:29,224 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:29,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367683466] [2024-11-13 12:46:29,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367683466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:29,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:29,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-13 12:46:29,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160572422] [2024-11-13 12:46:29,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:29,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:46:29,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:29,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:46:29,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:46:29,226 INFO L87 Difference]: Start difference. First operand 357 states and 454 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 12:46:29,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:29,750 INFO L93 Difference]: Finished difference Result 443 states and 562 transitions. [2024-11-13 12:46:29,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 12:46:29,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 54 [2024-11-13 12:46:29,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:29,752 INFO L225 Difference]: With dead ends: 443 [2024-11-13 12:46:29,753 INFO L226 Difference]: Without dead ends: 398 [2024-11-13 12:46:29,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:46:29,754 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 69 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:29,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 970 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:46:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2024-11-13 12:46:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 357. [2024-11-13 12:46:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 309 states have (on average 1.203883495145631) internal successors, (372), 313 states have internal predecessors, (372), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-13 12:46:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 451 transitions. [2024-11-13 12:46:29,779 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 451 transitions. Word has length 54 [2024-11-13 12:46:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:29,779 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 451 transitions. [2024-11-13 12:46:29,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 12:46:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 451 transitions. [2024-11-13 12:46:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 12:46:29,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:29,781 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:29,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 12:46:29,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:29,986 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:29,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:29,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2135361552, now seen corresponding path program 1 times [2024-11-13 12:46:29,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:29,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029634021] [2024-11-13 12:46:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:29,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:29,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:29,989 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:29,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 12:46:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:30,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 12:46:30,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:46:30,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:30,429 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:30,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029634021] [2024-11-13 12:46:30,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029634021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:30,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [707576262] [2024-11-13 12:46:30,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:30,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 12:46:30,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 12:46:30,432 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 12:46:30,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2024-11-13 12:46:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:30,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 12:46:30,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:46:30,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:30,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [707576262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:30,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:46:30,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-13 12:46:30,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851024269] [2024-11-13 12:46:30,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:30,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 12:46:30,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 12:46:30,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:46:30,767 INFO L87 Difference]: Start difference. First operand 357 states and 451 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 12:46:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:31,113 INFO L93 Difference]: Finished difference Result 438 states and 556 transitions. [2024-11-13 12:46:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:46:31,114 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 54 [2024-11-13 12:46:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:31,116 INFO L225 Difference]: With dead ends: 438 [2024-11-13 12:46:31,116 INFO L226 Difference]: Without dead ends: 398 [2024-11-13 12:46:31,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:46:31,117 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 45 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:31,117 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 885 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:46:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2024-11-13 12:46:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 357. [2024-11-13 12:46:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 309 states have (on average 1.197411003236246) internal successors, (370), 313 states have internal predecessors, (370), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-13 12:46:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 449 transitions. [2024-11-13 12:46:31,145 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 449 transitions. Word has length 54 [2024-11-13 12:46:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:31,145 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 449 transitions. [2024-11-13 12:46:31,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 12:46:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 449 transitions. [2024-11-13 12:46:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 12:46:31,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:31,146 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:31,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 12:46:31,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2024-11-13 12:46:31,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 12:46:31,547 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:31,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:31,547 INFO L85 PathProgramCache]: Analyzing trace with hash 685704282, now seen corresponding path program 1 times [2024-11-13 12:46:31,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:31,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926594290] [2024-11-13 12:46:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:31,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:31,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:31,551 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:31,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-13 12:46:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:31,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 12:46:31,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:46:31,828 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:31,828 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:31,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926594290] [2024-11-13 12:46:31,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926594290] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:31,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:31,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 12:46:31,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979371792] [2024-11-13 12:46:31,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:31,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:46:31,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:31,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:46:31,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:46:31,829 INFO L87 Difference]: Start difference. First operand 357 states and 449 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:46:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:32,218 INFO L93 Difference]: Finished difference Result 429 states and 537 transitions. [2024-11-13 12:46:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:46:32,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-11-13 12:46:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:32,220 INFO L225 Difference]: With dead ends: 429 [2024-11-13 12:46:32,220 INFO L226 Difference]: Without dead ends: 375 [2024-11-13 12:46:32,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:46:32,221 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 55 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:32,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 779 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:46:32,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-13 12:46:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 357. [2024-11-13 12:46:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 309 states have (on average 1.1877022653721683) internal successors, (367), 313 states have internal predecessors, (367), 39 states have call successors, (39), 6 states have call predecessors, (39), 8 states have return successors, (40), 40 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-13 12:46:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 446 transitions. [2024-11-13 12:46:32,255 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 446 transitions. Word has length 54 [2024-11-13 12:46:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:32,256 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 446 transitions. [2024-11-13 12:46:32,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:46:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 446 transitions. [2024-11-13 12:46:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 12:46:32,257 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:32,257 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:32,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-13 12:46:32,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:32,457 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:32,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:32,458 INFO L85 PathProgramCache]: Analyzing trace with hash 543488406, now seen corresponding path program 1 times [2024-11-13 12:46:32,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:32,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418000869] [2024-11-13 12:46:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:32,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:32,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:32,461 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:32,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-13 12:46:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:32,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:46:32,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:46:32,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:33,047 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418000869] [2024-11-13 12:46:33,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418000869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1394427042] [2024-11-13 12:46:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:33,048 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 12:46:33,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 12:46:33,052 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 12:46:33,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-11-13 12:46:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:33,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 12:46:33,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:46:33,290 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:33,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1394427042] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:33,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:46:33,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-13 12:46:33,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267004807] [2024-11-13 12:46:33,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:33,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:46:33,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:46:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:46:33,291 INFO L87 Difference]: Start difference. First operand 357 states and 446 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:46:33,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:33,480 INFO L93 Difference]: Finished difference Result 377 states and 468 transitions. [2024-11-13 12:46:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:46:33,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-11-13 12:46:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:33,482 INFO L225 Difference]: With dead ends: 377 [2024-11-13 12:46:33,482 INFO L226 Difference]: Without dead ends: 375 [2024-11-13 12:46:33,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:46:33,483 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 10 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:33,483 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 341 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:46:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-13 12:46:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2024-11-13 12:46:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 312 states have (on average 1.185897435897436) internal successors, (370), 319 states have internal predecessors, (370), 42 states have call successors, (42), 7 states have call predecessors, (42), 9 states have return successors, (43), 40 states have call predecessors, (43), 40 states have call successors, (43) [2024-11-13 12:46:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 455 transitions. [2024-11-13 12:46:33,511 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 455 transitions. Word has length 54 [2024-11-13 12:46:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:33,512 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 455 transitions. [2024-11-13 12:46:33,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:46:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 455 transitions. [2024-11-13 12:46:33,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 12:46:33,513 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:33,513 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:33,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2024-11-13 12:46:33,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-13 12:46:33,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:33,914 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:33,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:33,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1571989714, now seen corresponding path program 1 times [2024-11-13 12:46:33,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:33,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672552866] [2024-11-13 12:46:33,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:33,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:33,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:33,916 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:33,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-13 12:46:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:33,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 12:46:33,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:46:34,185 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:34,185 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:34,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672552866] [2024-11-13 12:46:34,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672552866] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:34,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:34,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-13 12:46:34,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417372410] [2024-11-13 12:46:34,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:34,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:46:34,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:34,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:46:34,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:46:34,186 INFO L87 Difference]: Start difference. First operand 364 states and 455 transitions. Second operand has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 12:46:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:34,602 INFO L93 Difference]: Finished difference Result 418 states and 521 transitions. [2024-11-13 12:46:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-13 12:46:34,603 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 55 [2024-11-13 12:46:34,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:34,605 INFO L225 Difference]: With dead ends: 418 [2024-11-13 12:46:34,605 INFO L226 Difference]: Without dead ends: 371 [2024-11-13 12:46:34,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:46:34,606 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 77 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:34,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 810 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:46:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2024-11-13 12:46:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 339. [2024-11-13 12:46:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 290 states have (on average 1.186206896551724) internal successors, (344), 296 states have internal predecessors, (344), 39 states have call successors, (39), 7 states have call predecessors, (39), 9 states have return successors, (40), 37 states have call predecessors, (40), 37 states have call successors, (40) [2024-11-13 12:46:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 423 transitions. [2024-11-13 12:46:34,640 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 423 transitions. Word has length 55 [2024-11-13 12:46:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:34,640 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 423 transitions. [2024-11-13 12:46:34,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 12:46:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 423 transitions. [2024-11-13 12:46:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 12:46:34,641 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:34,642 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:34,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-13 12:46:34,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:34,843 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:34,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:34,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1458264854, now seen corresponding path program 1 times [2024-11-13 12:46:34,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:34,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763029140] [2024-11-13 12:46:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:34,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:34,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:34,846 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:34,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-13 12:46:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:34,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 12:46:34,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:46:34,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:46:35,118 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:35,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763029140] [2024-11-13 12:46:35,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763029140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:46:35,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:46:35,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-13 12:46:35,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085785612] [2024-11-13 12:46:35,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:35,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 12:46:35,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:35,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 12:46:35,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:46:35,119 INFO L87 Difference]: Start difference. First operand 339 states and 423 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 12:46:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:35,320 INFO L93 Difference]: Finished difference Result 390 states and 485 transitions. [2024-11-13 12:46:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:46:35,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 55 [2024-11-13 12:46:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:35,322 INFO L225 Difference]: With dead ends: 390 [2024-11-13 12:46:35,322 INFO L226 Difference]: Without dead ends: 339 [2024-11-13 12:46:35,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:46:35,323 INFO L432 NwaCegarLoop]: 121 mSDtfsCounter, 43 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:35,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 973 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:46:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-11-13 12:46:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 315. [2024-11-13 12:46:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 269 states have (on average 1.1858736059479553) internal successors, (319), 274 states have internal predecessors, (319), 36 states have call successors, (36), 7 states have call predecessors, (36), 9 states have return successors, (37), 34 states have call predecessors, (37), 34 states have call successors, (37) [2024-11-13 12:46:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 392 transitions. [2024-11-13 12:46:35,346 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 392 transitions. Word has length 55 [2024-11-13 12:46:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:35,346 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 392 transitions. [2024-11-13 12:46:35,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 11 states have internal predecessors, (53), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 12:46:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 392 transitions. [2024-11-13 12:46:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 12:46:35,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:35,347 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:35,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-13 12:46:35,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:35,550 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:35,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:35,550 INFO L85 PathProgramCache]: Analyzing trace with hash -531437556, now seen corresponding path program 1 times [2024-11-13 12:46:35,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:35,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983604838] [2024-11-13 12:46:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:35,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:35,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:35,552 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:35,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-13 12:46:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:35,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:46:35,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 12:46:35,694 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:35,695 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:35,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983604838] [2024-11-13 12:46:35,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983604838] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:35,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:46:35,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 12:46:35,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608151668] [2024-11-13 12:46:35,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:35,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 12:46:35,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:35,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 12:46:35,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-13 12:46:35,696 INFO L87 Difference]: Start difference. First operand 315 states and 392 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:46:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:35,867 INFO L93 Difference]: Finished difference Result 344 states and 422 transitions. [2024-11-13 12:46:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 12:46:35,868 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-11-13 12:46:35,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:35,869 INFO L225 Difference]: With dead ends: 344 [2024-11-13 12:46:35,869 INFO L226 Difference]: Without dead ends: 263 [2024-11-13 12:46:35,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:46:35,870 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 39 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:35,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 647 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:46:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-13 12:46:35,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 247. [2024-11-13 12:46:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 211 states have (on average 1.1753554502369667) internal successors, (248), 216 states have internal predecessors, (248), 26 states have call successors, (26), 7 states have call predecessors, (26), 9 states have return successors, (27), 24 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-13 12:46:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 301 transitions. [2024-11-13 12:46:35,889 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 301 transitions. Word has length 55 [2024-11-13 12:46:35,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:35,890 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 301 transitions. [2024-11-13 12:46:35,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:46:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 301 transitions. [2024-11-13 12:46:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 12:46:35,891 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:35,891 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:35,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-13 12:46:36,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:36,092 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:46:36,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash -645162416, now seen corresponding path program 1 times [2024-11-13 12:46:36,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:46:36,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044832662] [2024-11-13 12:46:36,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:36,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:36,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:36,094 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:36,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-13 12:46:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:36,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 12:46:36,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:46:46,975 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:50,508 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:46:50,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044832662] [2024-11-13 12:46:50,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044832662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:50,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [102341808] [2024-11-13 12:46:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:50,508 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 12:46:50,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 12:46:50,510 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 12:46:50,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2024-11-13 12:46:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:50,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 12:46:50,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:46:58,452 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:46:58,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [102341808] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:46:58,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:46:58,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 12 [2024-11-13 12:46:58,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674506142] [2024-11-13 12:46:58,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:46:58,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:46:58,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:46:58,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:46:58,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=236, Unknown=4, NotChecked=0, Total=306 [2024-11-13 12:46:58,453 INFO L87 Difference]: Start difference. First operand 247 states and 301 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:47:02,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 12:47:05,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.46s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 12:47:09,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 12:47:19,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-13 12:47:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:47:19,908 INFO L93 Difference]: Finished difference Result 264 states and 317 transitions. [2024-11-13 12:47:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 12:47:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-11-13 12:47:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:47:19,909 INFO L225 Difference]: With dead ends: 264 [2024-11-13 12:47:19,909 INFO L226 Difference]: Without dead ends: 262 [2024-11-13 12:47:19,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=107, Invalid=350, Unknown=5, NotChecked=0, Total=462 [2024-11-13 12:47:19,910 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 11 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:47:19,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 576 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 4 Unknown, 0 Unchecked, 17.4s Time] [2024-11-13 12:47:19,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-13 12:47:19,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 244. [2024-11-13 12:47:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 211 states have (on average 1.1753554502369667) internal successors, (248), 213 states have internal predecessors, (248), 23 states have call successors, (23), 7 states have call predecessors, (23), 9 states have return successors, (24), 24 states have call predecessors, (24), 21 states have call successors, (24) [2024-11-13 12:47:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 295 transitions. [2024-11-13 12:47:19,928 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 295 transitions. Word has length 55 [2024-11-13 12:47:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:47:19,928 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 295 transitions. [2024-11-13 12:47:19,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:47:19,928 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 295 transitions. [2024-11-13 12:47:19,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 12:47:19,929 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:47:19,929 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:47:19,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-13 12:47:20,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2024-11-13 12:47:20,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 12:47:20,330 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:47:20,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:47:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1290637791, now seen corresponding path program 1 times [2024-11-13 12:47:20,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:47:20,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803652934] [2024-11-13 12:47:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:47:20,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:47:20,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:47:20,332 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:47:20,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-13 12:47:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:47:20,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 12:47:20,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:47:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 12:47:20,429 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:47:20,429 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:47:20,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803652934] [2024-11-13 12:47:20,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803652934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:47:20,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:47:20,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:47:20,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180491787] [2024-11-13 12:47:20,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:47:20,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:47:20,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:47:20,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:47:20,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:47:20,430 INFO L87 Difference]: Start difference. First operand 244 states and 295 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 12:47:20,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:47:20,487 INFO L93 Difference]: Finished difference Result 256 states and 307 transitions. [2024-11-13 12:47:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:47:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2024-11-13 12:47:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:47:20,488 INFO L225 Difference]: With dead ends: 256 [2024-11-13 12:47:20,488 INFO L226 Difference]: Without dead ends: 254 [2024-11-13 12:47:20,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:47:20,489 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 8 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:47:20,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 481 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:47:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-13 12:47:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2024-11-13 12:47:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 215 states have (on average 1.172093023255814) internal successors, (252), 218 states have internal predecessors, (252), 24 states have call successors, (24), 8 states have call predecessors, (24), 10 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2024-11-13 12:47:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 301 transitions. [2024-11-13 12:47:20,507 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 301 transitions. Word has length 60 [2024-11-13 12:47:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:47:20,508 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 301 transitions. [2024-11-13 12:47:20,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 12:47:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 301 transitions. [2024-11-13 12:47:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-13 12:47:20,509 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:47:20,509 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:47:20,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-13 12:47:20,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:47:20,710 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:47:20,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:47:20,710 INFO L85 PathProgramCache]: Analyzing trace with hash 314309995, now seen corresponding path program 1 times [2024-11-13 12:47:20,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:47:20,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019662002] [2024-11-13 12:47:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:47:20,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:47:20,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:47:20,712 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:47:20,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-13 12:47:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:47:20,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 12:47:20,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:47:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 12:47:20,806 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:47:20,806 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:47:20,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019662002] [2024-11-13 12:47:20,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019662002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:47:20,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:47:20,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:47:20,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543273576] [2024-11-13 12:47:20,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:47:20,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:47:20,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:47:20,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:47:20,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:47:20,807 INFO L87 Difference]: Start difference. First operand 250 states and 301 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 12:47:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:47:20,878 INFO L93 Difference]: Finished difference Result 271 states and 322 transitions. [2024-11-13 12:47:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:47:20,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2024-11-13 12:47:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:47:20,880 INFO L225 Difference]: With dead ends: 271 [2024-11-13 12:47:20,880 INFO L226 Difference]: Without dead ends: 269 [2024-11-13 12:47:20,881 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:47:20,881 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 19 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:47:20,881 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 529 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 12:47:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-11-13 12:47:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 254. [2024-11-13 12:47:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 218 states have (on average 1.1697247706422018) internal successors, (255), 221 states have internal predecessors, (255), 24 states have call successors, (24), 9 states have call predecessors, (24), 11 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2024-11-13 12:47:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 304 transitions. [2024-11-13 12:47:20,904 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 304 transitions. Word has length 60 [2024-11-13 12:47:20,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:47:20,904 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 304 transitions. [2024-11-13 12:47:20,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-13 12:47:20,904 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 304 transitions. [2024-11-13 12:47:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-13 12:47:20,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:47:20,905 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:47:20,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-13 12:47:21,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:47:21,108 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:47:21,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:47:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2103290236, now seen corresponding path program 1 times [2024-11-13 12:47:21,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:47:21,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893046301] [2024-11-13 12:47:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:47:21,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:47:21,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:47:21,112 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:47:21,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-13 12:47:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:47:21,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 12:47:21,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:47:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 12:47:22,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:47:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 12:47:24,370 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:47:24,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893046301] [2024-11-13 12:47:24,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893046301] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:47:24,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:47:24,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-13 12:47:24,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981840259] [2024-11-13 12:47:24,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:47:24,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 12:47:24,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:47:24,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 12:47:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2024-11-13 12:47:24,374 INFO L87 Difference]: Start difference. First operand 254 states and 304 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-13 12:47:39,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2024-11-13 12:47:59,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:47:59,305 INFO L93 Difference]: Finished difference Result 393 states and 477 transitions. [2024-11-13 12:47:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-13 12:47:59,306 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2024-11-13 12:47:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:47:59,308 INFO L225 Difference]: With dead ends: 393 [2024-11-13 12:47:59,308 INFO L226 Difference]: Without dead ends: 363 [2024-11-13 12:47:59,309 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=296, Invalid=2056, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 12:47:59,309 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 82 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2024-11-13 12:47:59,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1134 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1051 Invalid, 1 Unknown, 0 Unchecked, 15.0s Time] [2024-11-13 12:47:59,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-11-13 12:47:59,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 276. [2024-11-13 12:47:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 236 states have (on average 1.1779661016949152) internal successors, (278), 239 states have internal predecessors, (278), 28 states have call successors, (28), 9 states have call predecessors, (28), 11 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) [2024-11-13 12:47:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 335 transitions. [2024-11-13 12:47:59,341 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 335 transitions. Word has length 65 [2024-11-13 12:47:59,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:47:59,342 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 335 transitions. [2024-11-13 12:47:59,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-13 12:47:59,342 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 335 transitions. [2024-11-13 12:47:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 12:47:59,343 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:47:59,343 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:47:59,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-13 12:47:59,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:47:59,548 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:47:59,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:47:59,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1873276140, now seen corresponding path program 1 times [2024-11-13 12:47:59,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:47:59,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702964875] [2024-11-13 12:47:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:47:59,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:47:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:47:59,551 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:47:59,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-13 12:47:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:47:59,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 12:47:59,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 12:48:00,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:48:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-13 12:48:01,262 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:48:01,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702964875] [2024-11-13 12:48:01,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702964875] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:48:01,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:48:01,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-13 12:48:01,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593077235] [2024-11-13 12:48:01,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:48:01,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 12:48:01,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:48:01,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 12:48:01,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-13 12:48:01,263 INFO L87 Difference]: Start difference. First operand 276 states and 335 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-13 12:48:03,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:48:03,323 INFO L93 Difference]: Finished difference Result 359 states and 432 transitions. [2024-11-13 12:48:03,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 12:48:03,323 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 66 [2024-11-13 12:48:03,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:48:03,325 INFO L225 Difference]: With dead ends: 359 [2024-11-13 12:48:03,325 INFO L226 Difference]: Without dead ends: 340 [2024-11-13 12:48:03,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:48:03,326 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 46 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:48:03,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 787 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 12:48:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-11-13 12:48:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 312. [2024-11-13 12:48:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 269 states have (on average 1.1672862453531598) internal successors, (314), 273 states have internal predecessors, (314), 31 states have call successors, (31), 9 states have call predecessors, (31), 11 states have return successors, (32), 31 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-13 12:48:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 377 transitions. [2024-11-13 12:48:03,361 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 377 transitions. Word has length 66 [2024-11-13 12:48:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:48:03,362 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 377 transitions. [2024-11-13 12:48:03,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-13 12:48:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 377 transitions. [2024-11-13 12:48:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 12:48:03,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:48:03,363 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:48:03,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-13 12:48:03,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:03,564 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:48:03,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:48:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1620825136, now seen corresponding path program 1 times [2024-11-13 12:48:03,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:48:03,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964344110] [2024-11-13 12:48:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:03,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:03,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:48:03,566 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:48:03,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-13 12:48:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:03,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 12:48:03,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 12:48:05,348 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:48:05,348 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:48:05,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964344110] [2024-11-13 12:48:05,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964344110] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:48:05,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:48:05,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 12:48:05,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655746485] [2024-11-13 12:48:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:48:05,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 12:48:05,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:48:05,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 12:48:05,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:48:05,349 INFO L87 Difference]: Start difference. First operand 312 states and 377 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 12:48:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:48:07,257 INFO L93 Difference]: Finished difference Result 351 states and 421 transitions. [2024-11-13 12:48:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 12:48:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2024-11-13 12:48:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:48:07,260 INFO L225 Difference]: With dead ends: 351 [2024-11-13 12:48:07,260 INFO L226 Difference]: Without dead ends: 333 [2024-11-13 12:48:07,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-13 12:48:07,261 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 3 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-13 12:48:07,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 556 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-13 12:48:07,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-11-13 12:48:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 316. [2024-11-13 12:48:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 272 states have (on average 1.161764705882353) internal successors, (316), 276 states have internal predecessors, (316), 32 states have call successors, (32), 9 states have call predecessors, (32), 11 states have return successors, (33), 32 states have call predecessors, (33), 30 states have call successors, (33) [2024-11-13 12:48:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 381 transitions. [2024-11-13 12:48:07,310 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 381 transitions. Word has length 66 [2024-11-13 12:48:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:48:07,311 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 381 transitions. [2024-11-13 12:48:07,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 12:48:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 381 transitions. [2024-11-13 12:48:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-13 12:48:07,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:48:07,313 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:48:07,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-13 12:48:07,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:07,513 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:48:07,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:48:07,513 INFO L85 PathProgramCache]: Analyzing trace with hash 814169920, now seen corresponding path program 1 times [2024-11-13 12:48:07,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:48:07,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705567905] [2024-11-13 12:48:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:07,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:07,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:48:07,517 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:48:07,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-13 12:48:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:07,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:48:07,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 12:48:08,656 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:48:08,656 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:48:08,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705567905] [2024-11-13 12:48:08,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705567905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:48:08,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:48:08,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-13 12:48:08,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629626391] [2024-11-13 12:48:08,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:48:08,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:48:08,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:48:08,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:48:08,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:48:08,657 INFO L87 Difference]: Start difference. First operand 316 states and 381 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 12:48:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:48:11,260 INFO L93 Difference]: Finished difference Result 385 states and 464 transitions. [2024-11-13 12:48:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:48:11,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2024-11-13 12:48:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:48:11,263 INFO L225 Difference]: With dead ends: 385 [2024-11-13 12:48:11,263 INFO L226 Difference]: Without dead ends: 355 [2024-11-13 12:48:11,263 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:48:11,263 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 29 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:48:11,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 600 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 12:48:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-11-13 12:48:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 284. [2024-11-13 12:48:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 245 states have (on average 1.1510204081632653) internal successors, (282), 249 states have internal predecessors, (282), 27 states have call successors, (27), 9 states have call predecessors, (27), 11 states have return successors, (28), 27 states have call predecessors, (28), 25 states have call successors, (28) [2024-11-13 12:48:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 337 transitions. [2024-11-13 12:48:11,295 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 337 transitions. Word has length 66 [2024-11-13 12:48:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:48:11,296 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 337 transitions. [2024-11-13 12:48:11,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 12:48:11,296 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 337 transitions. [2024-11-13 12:48:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-13 12:48:11,297 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:48:11,297 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:48:11,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-13 12:48:11,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:11,498 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:48:11,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:48:11,498 INFO L85 PathProgramCache]: Analyzing trace with hash -232125966, now seen corresponding path program 1 times [2024-11-13 12:48:11,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:48:11,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824448628] [2024-11-13 12:48:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:11,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:11,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:48:11,503 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:48:11,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-13 12:48:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:11,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 12:48:11,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:48:11,874 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:48:11,874 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:48:11,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824448628] [2024-11-13 12:48:11,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824448628] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:48:11,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:48:11,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:48:11,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889593230] [2024-11-13 12:48:11,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:48:11,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:48:11,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:48:11,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:48:11,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:48:11,876 INFO L87 Difference]: Start difference. First operand 284 states and 337 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 12:48:12,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:48:12,195 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2024-11-13 12:48:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:48:12,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2024-11-13 12:48:12,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:48:12,197 INFO L225 Difference]: With dead ends: 314 [2024-11-13 12:48:12,197 INFO L226 Difference]: Without dead ends: 300 [2024-11-13 12:48:12,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:48:12,197 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 14 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:48:12,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 495 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:48:12,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-11-13 12:48:12,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 251. [2024-11-13 12:48:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 213 states have (on average 1.15962441314554) internal successors, (247), 220 states have internal predecessors, (247), 26 states have call successors, (26), 9 states have call predecessors, (26), 11 states have return successors, (27), 23 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-13 12:48:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 300 transitions. [2024-11-13 12:48:12,229 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 300 transitions. Word has length 68 [2024-11-13 12:48:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:48:12,229 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 300 transitions. [2024-11-13 12:48:12,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 12:48:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 300 transitions. [2024-11-13 12:48:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-13 12:48:12,230 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:48:12,230 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:48:12,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-13 12:48:12,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:12,431 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:48:12,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:48:12,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1120675140, now seen corresponding path program 1 times [2024-11-13 12:48:12,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:48:12,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893545113] [2024-11-13 12:48:12,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:12,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:12,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:48:12,433 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:48:12,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-13 12:48:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:12,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 12:48:12,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-13 12:48:12,773 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:48:12,773 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:48:12,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893545113] [2024-11-13 12:48:12,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893545113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:48:12,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:48:12,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-13 12:48:12,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213548868] [2024-11-13 12:48:12,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:48:12,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 12:48:12,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:48:12,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 12:48:12,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:48:12,774 INFO L87 Difference]: Start difference. First operand 251 states and 300 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 12:48:13,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:48:13,092 INFO L93 Difference]: Finished difference Result 277 states and 327 transitions. [2024-11-13 12:48:13,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:48:13,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2024-11-13 12:48:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:48:13,094 INFO L225 Difference]: With dead ends: 277 [2024-11-13 12:48:13,094 INFO L226 Difference]: Without dead ends: 202 [2024-11-13 12:48:13,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 12:48:13,095 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 14 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:48:13,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 488 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:48:13,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-13 12:48:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 176. [2024-11-13 12:48:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 148 states have (on average 1.1824324324324325) internal successors, (175), 154 states have internal predecessors, (175), 19 states have call successors, (19), 7 states have call predecessors, (19), 8 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-13 12:48:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 211 transitions. [2024-11-13 12:48:13,121 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 211 transitions. Word has length 68 [2024-11-13 12:48:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:48:13,121 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 211 transitions. [2024-11-13 12:48:13,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 12:48:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 211 transitions. [2024-11-13 12:48:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-13 12:48:13,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:48:13,122 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:48:13,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-13 12:48:13,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:13,326 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:48:13,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:48:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash 958040962, now seen corresponding path program 1 times [2024-11-13 12:48:13,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:48:13,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141154392] [2024-11-13 12:48:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:13,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:13,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:48:13,330 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:48:13,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-13 12:48:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:13,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 12:48:13,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:48:14,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:48:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:48:14,702 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:48:14,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141154392] [2024-11-13 12:48:14,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141154392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:48:14,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:48:14,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-13 12:48:14,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726546255] [2024-11-13 12:48:14,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:48:14,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 12:48:14,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:48:14,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 12:48:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-13 12:48:14,703 INFO L87 Difference]: Start difference. First operand 176 states and 211 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 12:48:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:48:15,900 INFO L93 Difference]: Finished difference Result 205 states and 238 transitions. [2024-11-13 12:48:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 12:48:15,901 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2024-11-13 12:48:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:48:15,902 INFO L225 Difference]: With dead ends: 205 [2024-11-13 12:48:15,902 INFO L226 Difference]: Without dead ends: 152 [2024-11-13 12:48:15,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:48:15,903 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 9 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:48:15,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 616 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 12:48:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-13 12:48:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2024-11-13 12:48:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 132 states have internal predecessors, (148), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-13 12:48:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2024-11-13 12:48:15,921 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 67 [2024-11-13 12:48:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:48:15,921 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2024-11-13 12:48:15,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 12:48:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2024-11-13 12:48:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 12:48:15,922 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:48:15,922 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:48:15,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-13 12:48:16,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:16,122 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:48:16,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:48:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1572187648, now seen corresponding path program 1 times [2024-11-13 12:48:16,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:48:16,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998360225] [2024-11-13 12:48:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:16,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:16,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:48:16,125 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:48:16,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-13 12:48:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:16,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 12:48:16,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-13 12:48:16,538 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:48:16,538 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:48:16,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998360225] [2024-11-13 12:48:16,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998360225] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:48:16,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:48:16,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:48:16,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167095097] [2024-11-13 12:48:16,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:48:16,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:48:16,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:48:16,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:48:16,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:48:16,539 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:48:16,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:48:16,663 INFO L93 Difference]: Finished difference Result 180 states and 208 transitions. [2024-11-13 12:48:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:48:16,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2024-11-13 12:48:16,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:48:16,665 INFO L225 Difference]: With dead ends: 180 [2024-11-13 12:48:16,665 INFO L226 Difference]: Without dead ends: 131 [2024-11-13 12:48:16,666 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:48:16,666 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 14 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:48:16,667 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 264 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:48:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-13 12:48:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2024-11-13 12:48:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 105 states have (on average 1.1238095238095238) internal successors, (118), 107 states have internal predecessors, (118), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-13 12:48:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2024-11-13 12:48:16,694 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 69 [2024-11-13 12:48:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:48:16,697 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2024-11-13 12:48:16,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:48:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2024-11-13 12:48:16,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 12:48:16,698 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:48:16,698 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:48:16,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-13 12:48:16,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:16,899 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:48:16,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:48:16,899 INFO L85 PathProgramCache]: Analyzing trace with hash -671795650, now seen corresponding path program 1 times [2024-11-13 12:48:16,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:48:16,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898389221] [2024-11-13 12:48:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:16,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:16,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:48:16,901 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:48:16,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-13 12:48:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:16,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 12:48:16,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:48:18,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:48:19,367 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:48:19,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898389221] [2024-11-13 12:48:19,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898389221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:48:19,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [54289725] [2024-11-13 12:48:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:19,368 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 12:48:19,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 12:48:19,370 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 12:48:19,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2024-11-13 12:48:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:19,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 12:48:19,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 12:48:20,341 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:48:20,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [54289725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:48:20,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:48:20,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-13 12:48:20,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163194963] [2024-11-13 12:48:20,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:48:20,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:48:20,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:48:20,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:48:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:48:20,343 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:48:21,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:48:21,000 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2024-11-13 12:48:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:48:21,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2024-11-13 12:48:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:48:21,002 INFO L225 Difference]: With dead ends: 171 [2024-11-13 12:48:21,002 INFO L226 Difference]: Without dead ends: 123 [2024-11-13 12:48:21,002 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2024-11-13 12:48:21,003 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 20 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:48:21,003 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 308 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 12:48:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-13 12:48:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-11-13 12:48:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 105 states have (on average 1.1142857142857143) internal successors, (117), 107 states have internal predecessors, (117), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-13 12:48:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2024-11-13 12:48:21,022 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 69 [2024-11-13 12:48:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:48:21,023 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2024-11-13 12:48:21,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 12:48:21,023 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2024-11-13 12:48:21,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-13 12:48:21,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:48:21,024 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:48:21,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-13 12:48:21,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2024-11-13 12:48:21,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 12:48:21,425 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:48:21,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:48:21,425 INFO L85 PathProgramCache]: Analyzing trace with hash 29804224, now seen corresponding path program 1 times [2024-11-13 12:48:21,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:48:21,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660823398] [2024-11-13 12:48:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:21,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:21,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:48:21,427 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:48:21,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-13 12:48:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:21,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 12:48:21,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 12:48:22,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:48:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:48:22,776 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:48:22,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660823398] [2024-11-13 12:48:22,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660823398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:48:22,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:48:22,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-13 12:48:22,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626965561] [2024-11-13 12:48:22,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:48:22,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:48:22,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:48:22,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:48:22,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:48:22,778 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 12:48:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:48:23,355 INFO L93 Difference]: Finished difference Result 135 states and 148 transitions. [2024-11-13 12:48:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 12:48:23,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 69 [2024-11-13 12:48:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:48:23,357 INFO L225 Difference]: With dead ends: 135 [2024-11-13 12:48:23,357 INFO L226 Difference]: Without dead ends: 84 [2024-11-13 12:48:23,357 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-13 12:48:23,357 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:48:23,358 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 406 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 12:48:23,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-13 12:48:23,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-13 12:48:23,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 70 states have internal predecessors, (77), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 12:48:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2024-11-13 12:48:23,370 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 69 [2024-11-13 12:48:23,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:48:23,370 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2024-11-13 12:48:23,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 12:48:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2024-11-13 12:48:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 12:48:23,371 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:48:23,371 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:48:23,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-13 12:48:23,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:23,572 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:48:23,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:48:23,572 INFO L85 PathProgramCache]: Analyzing trace with hash -670003697, now seen corresponding path program 1 times [2024-11-13 12:48:23,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:48:23,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931421656] [2024-11-13 12:48:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:23,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:23,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:48:23,574 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:48:23,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-13 12:48:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:23,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-13 12:48:23,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 12:48:26,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:48:30,117 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:48:30,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931421656] [2024-11-13 12:48:30,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931421656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:48:30,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [433936711] [2024-11-13 12:48:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:30,118 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 12:48:30,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 12:48:30,120 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 12:48:30,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2024-11-13 12:48:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:30,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-13 12:48:30,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 12:48:32,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:48:34,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [433936711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:48:34,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:48:34,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2024-11-13 12:48:34,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950799371] [2024-11-13 12:48:34,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:48:34,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 12:48:34,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:48:34,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 12:48:34,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2024-11-13 12:48:34,443 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 12:48:42,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:48:42,415 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2024-11-13 12:48:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 12:48:42,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2024-11-13 12:48:42,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:48:42,416 INFO L225 Difference]: With dead ends: 106 [2024-11-13 12:48:42,417 INFO L226 Difference]: Without dead ends: 88 [2024-11-13 12:48:42,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 172 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 12:48:42,418 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:48:42,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 572 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-13 12:48:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-13 12:48:42,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2024-11-13 12:48:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 70 states have internal predecessors, (76), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-13 12:48:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2024-11-13 12:48:42,430 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 73 [2024-11-13 12:48:42,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:48:42,431 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2024-11-13 12:48:42,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-13 12:48:42,431 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2024-11-13 12:48:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-13 12:48:42,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:48:42,432 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:48:42,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2024-11-13 12:48:42,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-13 12:48:42,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:42,832 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:48:42,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:48:42,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1514009199, now seen corresponding path program 1 times [2024-11-13 12:48:42,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:48:42,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291148914] [2024-11-13 12:48:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:48:42,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:48:42,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:48:42,835 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:48:42,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-13 12:48:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:48:42,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 12:48:42,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:48:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 12:48:47,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:48:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-13 12:48:56,705 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:48:56,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291148914] [2024-11-13 12:48:56,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291148914] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:48:56,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:48:56,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-11-13 12:48:56,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873447961] [2024-11-13 12:48:56,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 12:48:56,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-13 12:48:56,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:48:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-13 12:48:56,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2024-11-13 12:48:56,707 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-13 12:49:01,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.55s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-13 12:49:21,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:49:21,861 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2024-11-13 12:49:21,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 12:49:21,862 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 73 [2024-11-13 12:49:21,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:49:21,863 INFO L225 Difference]: With dead ends: 114 [2024-11-13 12:49:21,863 INFO L226 Difference]: Without dead ends: 72 [2024-11-13 12:49:21,863 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 12:49:21,864 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 55 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:49:21,864 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 504 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2024-11-13 12:49:21,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-13 12:49:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2024-11-13 12:49:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 56 states have internal predecessors, (60), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 12:49:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2024-11-13 12:49:21,872 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 73 [2024-11-13 12:49:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:49:21,872 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2024-11-13 12:49:21,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-13 12:49:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2024-11-13 12:49:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-13 12:49:21,872 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:49:21,873 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:49:21,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-13 12:49:22,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:49:22,073 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 12:49:22,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:49:22,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1027887339, now seen corresponding path program 1 times [2024-11-13 12:49:22,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 12:49:22,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616050105] [2024-11-13 12:49:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:49:22,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:49:22,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:49:22,076 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:49:22,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-13 12:49:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:49:22,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 12:49:22,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:49:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-13 12:49:24,526 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:49:24,527 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 12:49:24,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616050105] [2024-11-13 12:49:24,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616050105] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:49:24,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:49:24,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-13 12:49:24,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226560165] [2024-11-13 12:49:24,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:49:24,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:49:24,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 12:49:24,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:49:24,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:49:24,528 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 12:49:26,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:49:26,494 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2024-11-13 12:49:26,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:49:26,495 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2024-11-13 12:49:26,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:49:26,496 INFO L225 Difference]: With dead ends: 75 [2024-11-13 12:49:26,496 INFO L226 Difference]: Without dead ends: 0 [2024-11-13 12:49:26,496 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:49:26,497 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-13 12:49:26,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 413 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-13 12:49:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-13 12:49:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-13 12:49:26,497 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) [2024-11-13 12:49:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-13 12:49:26,498 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2024-11-13 12:49:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:49:26,498 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-13 12:49:26,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 12:49:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-13 12:49:26,499 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-13 12:49:26,501 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-13 12:49:26,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-13 12:49:26,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:49:26,705 INFO L407 BasicCegarLoop]: Path program histogram: [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:49:26,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-13 12:50:01,940 WARN L286 SmtUtils]: Spent 33.58s on a formula simplification. DAG size of input: 137 DAG size of output: 170 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-13 12:50:27,702 WARN L286 SmtUtils]: Spent 18.47s on a formula simplification. DAG size of input: 348 DAG size of output: 101 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-13 12:53:07,338 WARN L286 SmtUtils]: Spent 2.66m on a formula simplification. DAG size of input: 308 DAG size of output: 203 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-11-13 12:53:07,389 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-13 12:53:07,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 12:53:07 BoogieIcfgContainer [2024-11-13 12:53:07,411 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-13 12:53:07,412 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 12:53:07,413 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 12:53:07,413 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 12:53:07,414 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:46:12" (3/4) ... [2024-11-13 12:53:07,416 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-13 12:53:07,421 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure base2flt [2024-11-13 12:53:07,422 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-13 12:53:07,430 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2024-11-13 12:53:07,431 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-11-13 12:53:07,431 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-13 12:53:07,431 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-13 12:53:07,464 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (0 != \old(m)) [2024-11-13 12:53:07,464 WARN L216 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (0 != \old(m)) [2024-11-13 12:53:07,493 WARN L141 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (0 != \old(m)) [2024-11-13 12:53:07,493 WARN L141 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (0 != \old(m)) [2024-11-13 12:53:07,540 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/witness.graphml [2024-11-13 12:53:07,540 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/witness.yml [2024-11-13 12:53:07,540 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 12:53:07,541 INFO L158 Benchmark]: Toolchain (without parser) took 415867.05ms. Allocated memory was 117.4MB in the beginning and 478.2MB in the end (delta: 360.7MB). Free memory was 93.0MB in the beginning and 194.6MB in the end (delta: -101.6MB). Peak memory consumption was 258.6MB. Max. memory is 16.1GB. [2024-11-13 12:53:07,541 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory is still 64.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:53:07,541 INFO L158 Benchmark]: CACSL2BoogieTranslator took 368.63ms. Allocated memory is still 117.4MB. Free memory was 93.0MB in the beginning and 78.6MB in the end (delta: 14.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 12:53:07,541 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.34ms. Allocated memory is still 117.4MB. Free memory was 78.6MB in the beginning and 76.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:53:07,541 INFO L158 Benchmark]: Boogie Preprocessor took 40.20ms. Allocated memory is still 117.4MB. Free memory was 76.8MB in the beginning and 74.9MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:53:07,542 INFO L158 Benchmark]: RCFGBuilder took 597.81ms. Allocated memory is still 117.4MB. Free memory was 74.9MB in the beginning and 56.0MB in the end (delta: 18.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 12:53:07,542 INFO L158 Benchmark]: TraceAbstraction took 414687.77ms. Allocated memory was 117.4MB in the beginning and 478.2MB in the end (delta: 360.7MB). Free memory was 55.4MB in the beginning and 199.0MB in the end (delta: -143.5MB). Peak memory consumption was 251.5MB. Max. memory is 16.1GB. [2024-11-13 12:53:07,542 INFO L158 Benchmark]: Witness Printer took 128.30ms. Allocated memory is still 478.2MB. Free memory was 199.0MB in the beginning and 194.6MB in the end (delta: 4.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 12:53:07,545 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory is still 64.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 368.63ms. Allocated memory is still 117.4MB. Free memory was 93.0MB in the beginning and 78.6MB in the end (delta: 14.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.34ms. Allocated memory is still 117.4MB. Free memory was 78.6MB in the beginning and 76.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 40.20ms. Allocated memory is still 117.4MB. Free memory was 76.8MB in the beginning and 74.9MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 597.81ms. Allocated memory is still 117.4MB. Free memory was 74.9MB in the beginning and 56.0MB in the end (delta: 18.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 414687.77ms. Allocated memory was 117.4MB in the beginning and 478.2MB in the end (delta: 360.7MB). Free memory was 55.4MB in the beginning and 199.0MB in the end (delta: -143.5MB). Peak memory consumption was 251.5MB. Max. memory is 16.1GB. * Witness Printer took 128.30ms. Allocated memory is still 478.2MB. Free memory was 199.0MB in the beginning and 194.6MB in the end (delta: 4.4MB). There was no memory consumed. 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: 18]: 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 3 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 193.9s, OverallIterations: 48, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 108.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 1540 SdHoareTripleChecker+Valid, 61.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1430 mSDsluCounter, 26893 SdHoareTripleChecker+Invalid, 58.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 22362 mSDsCounter, 207 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7239 IncrementalHoareTripleChecker+Invalid, 7451 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 207 mSolverCounterUnsat, 4531 mSDtfsCounter, 7239 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3854 GetRequests, 3320 SyntacticMatches, 20 SemanticMatches, 514 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 97.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=466occurred in iteration=21, InterpolantAutomatonStates: 439, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 48 MinimizatonAttempts, 1174 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 68.9s InterpolantComputationTime, 2932 NumberOfCodeBlocks, 2914 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 3562 ConstructedInterpolants, 125 QuantifiedInterpolants, 12256 SizeOfPredicates, 107 NumberOfNonLiveVariables, 5202 ConjunctsInSsa, 536 ConjunctsInUnsatCore, 67 InterpolantComputations, 35 PerfectInterpolantSequences, 1231/1359 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: 38]: Loop Invariant Derived loop invariant: (0 != \old(m)) - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: (0 != \old(m)) - ProcedureContractResult [Line: 25]: Procedure Contract for base2flt Derived contract for procedure base2flt. Ensures: ((0 != m) || (0 == \result)) - ProcedureContractResult [Line: 16]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 == cond) Ensures: (1 == cond) RESULT: Ultimate proved your program to be correct! [2024-11-13 12:53:07,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4510fbce-8a04-4f44-96ba-5c611ec4ab6e/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE