./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB --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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:50:20,817 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:50:20,924 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:50:20,933 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:50:20,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:50:20,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:50:20,972 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:50:20,972 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:50:20,973 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:50:20,973 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:50:20,973 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:50:20,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:50:20,974 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:50:20,974 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:50:20,974 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:50:20,974 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:50:20,974 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:50:20,974 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:50:20,975 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:50:20,975 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:50:20,975 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:50:20,975 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:50:20,975 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:50:20,975 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:50:20,975 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:50:20,975 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:50:20,975 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:50:20,975 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:50:20,976 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:50:20,976 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:50:20,976 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:50:20,976 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:50:20,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:50:20,976 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:50:20,976 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:50:20,976 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:50:20,976 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:50:20,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:50:20,978 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:50:20,978 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:50:20,978 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:50:20,978 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:50:20,979 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:50:20,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:50:20,979 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:50:20,979 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:50:20,979 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:50:20,979 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:50:20,979 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_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2024-11-28 04:50:21,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:50:21,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:50:21,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:50:21,285 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:50:21,285 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:50:21,286 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2024-11-28 04:50:24,324 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/data/33c331f2b/647c93fb3c024d48903d6ab39d1c08c2/FLAGcb7ad5e89 [2024-11-28 04:50:24,639 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:50:24,640 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2024-11-28 04:50:24,676 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/data/33c331f2b/647c93fb3c024d48903d6ab39d1c08c2/FLAGcb7ad5e89 [2024-11-28 04:50:24,889 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/data/33c331f2b/647c93fb3c024d48903d6ab39d1c08c2 [2024-11-28 04:50:24,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:50:24,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:50:24,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:50:24,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:50:24,906 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:50:24,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:50:24" (1/1) ... [2024-11-28 04:50:24,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fbbf4cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:24, skipping insertion in model container [2024-11-28 04:50:24,910 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:50:24" (1/1) ... [2024-11-28 04:50:24,936 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:50:25,084 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_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-28 04:50:25,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:50:25,141 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:50:25,150 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_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-28 04:50:25,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:50:25,190 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:50:25,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25 WrapperNode [2024-11-28 04:50:25,191 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:50:25,192 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:50:25,192 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:50:25,192 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:50:25,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,207 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,226 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-11-28 04:50:25,226 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:50:25,226 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:50:25,226 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:50:25,227 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:50:25,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,246 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,263 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]. [2024-11-28 04:50:25,263 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,263 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,270 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,271 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,281 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,282 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,283 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,286 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:50:25,291 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:50:25,291 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:50:25,291 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:50:25,292 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (1/1) ... [2024-11-28 04:50:25,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:50:25,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:25,329 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:50:25,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:50:25,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:50:25,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:50:25,361 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-28 04:50:25,362 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-28 04:50:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:50:25,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:50:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-28 04:50:25,362 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-28 04:50:25,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:50:25,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:50:25,442 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:50:25,444 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:50:25,838 INFO L? ?]: Removed 52 outVars from TransFormulas that were not future-live. [2024-11-28 04:50:25,838 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:50:25,849 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:50:25,849 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 04:50:25,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:50:25 BoogieIcfgContainer [2024-11-28 04:50:25,849 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:50:25,853 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:50:25,854 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:50:25,859 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:50:25,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:50:24" (1/3) ... [2024-11-28 04:50:25,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@582a3b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:50:25, skipping insertion in model container [2024-11-28 04:50:25,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:25" (2/3) ... [2024-11-28 04:50:25,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@582a3b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:50:25, skipping insertion in model container [2024-11-28 04:50:25,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:50:25" (3/3) ... [2024-11-28 04:50:25,864 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-11-28 04:50:25,882 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:50:25,884 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_4-2a.c.cil.c that has 4 procedures, 76 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 04:50:25,958 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:50:25,971 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;@47a46432, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:50:25,971 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:50:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 64 states have internal predecessors, (96), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:50:25,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 04:50:25,987 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:25,988 INFO L218 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] [2024-11-28 04:50:25,990 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:25,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:25,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1188071188, now seen corresponding path program 1 times [2024-11-28 04:50:26,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:26,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527335937] [2024-11-28 04:50:26,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:26,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:50:26,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:26,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527335937] [2024-11-28 04:50:26,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527335937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:26,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569486109] [2024-11-28 04:50:26,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:26,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:26,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:26,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:26,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:50:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:26,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:50:26,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:50:27,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:50:27,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569486109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:27,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:50:27,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-28 04:50:27,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744415105] [2024-11-28 04:50:27,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:27,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:50:27,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:27,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:50:27,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:50:27,292 INFO L87 Difference]: Start difference. First operand has 76 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 64 states have internal predecessors, (96), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:50:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:27,569 INFO L93 Difference]: Finished difference Result 172 states and 266 transitions. [2024-11-28 04:50:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:50:27,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-11-28 04:50:27,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:27,579 INFO L225 Difference]: With dead ends: 172 [2024-11-28 04:50:27,579 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 04:50:27,583 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:50:27,586 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 16 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:27,587 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1338 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 04:50:27,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2024-11-28 04:50:27,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 71 states have internal predecessors, (95), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-28 04:50:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2024-11-28 04:50:27,635 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 35 [2024-11-28 04:50:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:27,637 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2024-11-28 04:50:27,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:50:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2024-11-28 04:50:27,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 04:50:27,641 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:27,641 INFO L218 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] [2024-11-28 04:50:27,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:50:27,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 04:50:27,846 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:27,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:27,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1367897114, now seen corresponding path program 1 times [2024-11-28 04:50:27,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:27,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882329442] [2024-11-28 04:50:27,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:27,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:50:28,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:28,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882329442] [2024-11-28 04:50:28,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882329442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:28,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:28,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 04:50:28,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329723480] [2024-11-28 04:50:28,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:28,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:50:28,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:28,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:50:28,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:50:28,126 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:50:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:28,239 INFO L93 Difference]: Finished difference Result 157 states and 212 transitions. [2024-11-28 04:50:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:50:28,239 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2024-11-28 04:50:28,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:28,241 INFO L225 Difference]: With dead ends: 157 [2024-11-28 04:50:28,241 INFO L226 Difference]: Without dead ends: 108 [2024-11-28 04:50:28,242 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:50:28,243 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 13 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:28,243 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 649 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-28 04:50:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2024-11-28 04:50:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 77 states have internal predecessors, (101), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-28 04:50:28,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 126 transitions. [2024-11-28 04:50:28,262 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 126 transitions. Word has length 38 [2024-11-28 04:50:28,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:28,262 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 126 transitions. [2024-11-28 04:50:28,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:50:28,263 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 126 transitions. [2024-11-28 04:50:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 04:50:28,264 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:28,264 INFO L218 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] [2024-11-28 04:50:28,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:50:28,265 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:28,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash -213195858, now seen corresponding path program 2 times [2024-11-28 04:50:28,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:28,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151659169] [2024-11-28 04:50:28,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:28,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:28,316 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:50:28,316 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:50:28,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:28,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151659169] [2024-11-28 04:50:28,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151659169] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:28,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:28,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 04:50:28,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95137837] [2024-11-28 04:50:28,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:28,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:50:28,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:28,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:50:28,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:50:28,710 INFO L87 Difference]: Start difference. First operand 93 states and 126 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:50:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:29,008 INFO L93 Difference]: Finished difference Result 224 states and 307 transitions. [2024-11-28 04:50:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:50:29,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2024-11-28 04:50:29,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:29,010 INFO L225 Difference]: With dead ends: 224 [2024-11-28 04:50:29,012 INFO L226 Difference]: Without dead ends: 175 [2024-11-28 04:50:29,013 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:50:29,015 INFO L435 NwaCegarLoop]: 163 mSDtfsCounter, 120 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:29,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 1335 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:50:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-28 04:50:29,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2024-11-28 04:50:29,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 115 states have (on average 1.3304347826086957) internal successors, (153), 118 states have internal predecessors, (153), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (22), 14 states have call predecessors, (22), 14 states have call successors, (22) [2024-11-28 04:50:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 190 transitions. [2024-11-28 04:50:29,043 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 190 transitions. Word has length 41 [2024-11-28 04:50:29,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:29,044 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 190 transitions. [2024-11-28 04:50:29,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:50:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 190 transitions. [2024-11-28 04:50:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 04:50:29,049 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:29,049 INFO L218 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] [2024-11-28 04:50:29,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:50:29,049 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:29,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:29,050 INFO L85 PathProgramCache]: Analyzing trace with hash -606222868, now seen corresponding path program 1 times [2024-11-28 04:50:29,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:29,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320890208] [2024-11-28 04:50:29,050 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:29,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:50:29,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:29,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320890208] [2024-11-28 04:50:29,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320890208] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:29,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935662254] [2024-11-28 04:50:29,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:29,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:29,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:29,402 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:29,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:50:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:29,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 04:50:29,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:50:29,802 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:50:29,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935662254] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:29,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:50:29,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [9] total 17 [2024-11-28 04:50:29,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211564040] [2024-11-28 04:50:29,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:29,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:50:29,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:29,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:50:29,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:50:29,807 INFO L87 Difference]: Start difference. First operand 140 states and 190 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:50:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:30,159 INFO L93 Difference]: Finished difference Result 305 states and 420 transitions. [2024-11-28 04:50:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:50:30,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-11-28 04:50:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:30,163 INFO L225 Difference]: With dead ends: 305 [2024-11-28 04:50:30,164 INFO L226 Difference]: Without dead ends: 230 [2024-11-28 04:50:30,168 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:50:30,169 INFO L435 NwaCegarLoop]: 157 mSDtfsCounter, 68 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:30,169 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1893 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:50:30,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-28 04:50:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2024-11-28 04:50:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 179 states have (on average 1.324022346368715) internal successors, (237), 182 states have internal predecessors, (237), 22 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2024-11-28 04:50:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 290 transitions. [2024-11-28 04:50:30,197 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 290 transitions. Word has length 41 [2024-11-28 04:50:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:30,197 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 290 transitions. [2024-11-28 04:50:30,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:50:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 290 transitions. [2024-11-28 04:50:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:50:30,200 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:30,200 INFO L218 NwaCegarLoop]: trace histogram [3, 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] [2024-11-28 04:50:30,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:50:30,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:30,404 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:30,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:30,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1125380719, now seen corresponding path program 1 times [2024-11-28 04:50:30,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:30,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876951029] [2024-11-28 04:50:30,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:30,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:50:30,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:30,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876951029] [2024-11-28 04:50:30,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876951029] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:30,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:30,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 04:50:30,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44414779] [2024-11-28 04:50:30,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:30,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:50:30,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:30,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:50:30,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:50:30,686 INFO L87 Difference]: Start difference. First operand 214 states and 290 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:50:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:30,822 INFO L93 Difference]: Finished difference Result 297 states and 403 transitions. [2024-11-28 04:50:30,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:50:30,823 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2024-11-28 04:50:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:30,825 INFO L225 Difference]: With dead ends: 297 [2024-11-28 04:50:30,825 INFO L226 Difference]: Without dead ends: 257 [2024-11-28 04:50:30,829 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:50:30,829 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 85 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:30,830 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 765 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-11-28 04:50:30,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 249. [2024-11-28 04:50:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 210 states have (on average 1.3333333333333333) internal successors, (280), 213 states have internal predecessors, (280), 25 states have call successors, (25), 11 states have call predecessors, (25), 13 states have return successors, (34), 24 states have call predecessors, (34), 24 states have call successors, (34) [2024-11-28 04:50:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 339 transitions. [2024-11-28 04:50:30,879 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 339 transitions. Word has length 43 [2024-11-28 04:50:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:30,880 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 339 transitions. [2024-11-28 04:50:30,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:50:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 339 transitions. [2024-11-28 04:50:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:50:30,884 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:30,885 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:30,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 04:50:30,885 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:30,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:30,886 INFO L85 PathProgramCache]: Analyzing trace with hash 732353709, now seen corresponding path program 1 times [2024-11-28 04:50:30,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:30,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468733546] [2024-11-28 04:50:30,887 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:30,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:50:31,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:31,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468733546] [2024-11-28 04:50:31,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468733546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:31,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891940509] [2024-11-28 04:50:31,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:31,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:31,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:31,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:31,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:50:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:31,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:50:31,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:50:31,296 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:50:31,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891940509] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:31,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:50:31,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 13 [2024-11-28 04:50:31,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577666002] [2024-11-28 04:50:31,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:31,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:50:31,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:31,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:50:31,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:50:31,298 INFO L87 Difference]: Start difference. First operand 249 states and 339 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:50:31,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:31,426 INFO L93 Difference]: Finished difference Result 268 states and 361 transitions. [2024-11-28 04:50:31,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:50:31,426 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2024-11-28 04:50:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:31,431 INFO L225 Difference]: With dead ends: 268 [2024-11-28 04:50:31,432 INFO L226 Difference]: Without dead ends: 228 [2024-11-28 04:50:31,433 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:50:31,433 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 13 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:31,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 764 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-28 04:50:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 222. [2024-11-28 04:50:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 185 states have (on average 1.318918918918919) internal successors, (244), 188 states have internal predecessors, (244), 23 states have call successors, (23), 11 states have call predecessors, (23), 13 states have return successors, (32), 22 states have call predecessors, (32), 22 states have call successors, (32) [2024-11-28 04:50:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 299 transitions. [2024-11-28 04:50:31,462 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 299 transitions. Word has length 43 [2024-11-28 04:50:31,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:31,463 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 299 transitions. [2024-11-28 04:50:31,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:50:31,464 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 299 transitions. [2024-11-28 04:50:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:50:31,467 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:31,467 INFO L218 NwaCegarLoop]: trace histogram [3, 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] [2024-11-28 04:50:31,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:31,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 04:50:31,668 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:31,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:31,669 INFO L85 PathProgramCache]: Analyzing trace with hash 482012364, now seen corresponding path program 1 times [2024-11-28 04:50:31,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:31,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765146530] [2024-11-28 04:50:31,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:31,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:50:31,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:31,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765146530] [2024-11-28 04:50:31,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765146530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:31,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:31,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 04:50:31,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803252324] [2024-11-28 04:50:31,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:31,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:50:31,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:31,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:50:31,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:50:31,964 INFO L87 Difference]: Start difference. First operand 222 states and 299 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:50:32,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:32,126 INFO L93 Difference]: Finished difference Result 268 states and 358 transitions. [2024-11-28 04:50:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:50:32,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2024-11-28 04:50:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:32,130 INFO L225 Difference]: With dead ends: 268 [2024-11-28 04:50:32,131 INFO L226 Difference]: Without dead ends: 257 [2024-11-28 04:50:32,131 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:50:32,133 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 55 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:32,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 833 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-11-28 04:50:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 230. [2024-11-28 04:50:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 190 states have (on average 1.3105263157894738) internal successors, (249), 194 states have internal predecessors, (249), 25 states have call successors, (25), 11 states have call predecessors, (25), 14 states have return successors, (35), 24 states have call predecessors, (35), 24 states have call successors, (35) [2024-11-28 04:50:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 309 transitions. [2024-11-28 04:50:32,162 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 309 transitions. Word has length 44 [2024-11-28 04:50:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:32,163 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 309 transitions. [2024-11-28 04:50:32,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:50:32,163 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 309 transitions. [2024-11-28 04:50:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:50:32,165 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:32,166 INFO L218 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] [2024-11-28 04:50:32,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 04:50:32,166 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:32,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:32,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1183076942, now seen corresponding path program 1 times [2024-11-28 04:50:32,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:32,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100665056] [2024-11-28 04:50:32,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:32,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:50:32,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:32,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100665056] [2024-11-28 04:50:32,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100665056] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:32,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:32,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2024-11-28 04:50:32,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642606523] [2024-11-28 04:50:32,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:32,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:50:32,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:32,558 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:50:32,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:50:32,559 INFO L87 Difference]: Start difference. First operand 230 states and 309 transitions. Second operand has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-28 04:50:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:32,834 INFO L93 Difference]: Finished difference Result 324 states and 435 transitions. [2024-11-28 04:50:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:50:32,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2024-11-28 04:50:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:32,837 INFO L225 Difference]: With dead ends: 324 [2024-11-28 04:50:32,839 INFO L226 Difference]: Without dead ends: 316 [2024-11-28 04:50:32,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:50:32,841 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 57 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:32,841 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1160 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:50:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-11-28 04:50:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 233. [2024-11-28 04:50:32,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 193 states have (on average 1.305699481865285) internal successors, (252), 196 states have internal predecessors, (252), 25 states have call successors, (25), 11 states have call predecessors, (25), 14 states have return successors, (35), 25 states have call predecessors, (35), 24 states have call successors, (35) [2024-11-28 04:50:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 312 transitions. [2024-11-28 04:50:32,871 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 312 transitions. Word has length 44 [2024-11-28 04:50:32,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:32,871 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 312 transitions. [2024-11-28 04:50:32,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-28 04:50:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 312 transitions. [2024-11-28 04:50:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:50:32,873 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:32,873 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-11-28 04:50:32,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 04:50:32,873 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:32,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1723605225, now seen corresponding path program 1 times [2024-11-28 04:50:32,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:32,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813781472] [2024-11-28 04:50:32,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:32,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:50:32,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:32,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813781472] [2024-11-28 04:50:32,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813781472] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:32,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:32,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:50:32,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069306352] [2024-11-28 04:50:32,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:32,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:50:32,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:32,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:50:32,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:50:32,916 INFO L87 Difference]: Start difference. First operand 233 states and 312 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:50:32,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:32,975 INFO L93 Difference]: Finished difference Result 469 states and 636 transitions. [2024-11-28 04:50:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:50:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-28 04:50:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:32,977 INFO L225 Difference]: With dead ends: 469 [2024-11-28 04:50:32,978 INFO L226 Difference]: Without dead ends: 239 [2024-11-28 04:50:32,979 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:50:32,980 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 9 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 173 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 [2024-11-28 04:50:32,980 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 173 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:50:32,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-28 04:50:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2024-11-28 04:50:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 195 states have (on average 1.3076923076923077) internal successors, (255), 198 states have internal predecessors, (255), 25 states have call successors, (25), 11 states have call predecessors, (25), 14 states have return successors, (35), 25 states have call predecessors, (35), 24 states have call successors, (35) [2024-11-28 04:50:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 315 transitions. [2024-11-28 04:50:33,003 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 315 transitions. Word has length 44 [2024-11-28 04:50:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:33,003 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 315 transitions. [2024-11-28 04:50:33,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:50:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 315 transitions. [2024-11-28 04:50:33,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:50:33,006 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:33,007 INFO L218 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] [2024-11-28 04:50:33,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 04:50:33,007 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:33,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:33,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1020514514, now seen corresponding path program 1 times [2024-11-28 04:50:33,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:33,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238370460] [2024-11-28 04:50:33,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:33,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:50:33,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:33,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238370460] [2024-11-28 04:50:33,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238370460] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:33,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:33,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:50:33,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771670065] [2024-11-28 04:50:33,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:33,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:50:33,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:33,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:50:33,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:50:33,101 INFO L87 Difference]: Start difference. First operand 235 states and 315 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2024-11-28 04:50:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:33,139 INFO L93 Difference]: Finished difference Result 243 states and 322 transitions. [2024-11-28 04:50:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:50:33,139 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 46 [2024-11-28 04:50:33,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:33,141 INFO L225 Difference]: With dead ends: 243 [2024-11-28 04:50:33,141 INFO L226 Difference]: Without dead ends: 228 [2024-11-28 04:50:33,142 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:50:33,142 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 3 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 477 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 [2024-11-28 04:50:33,143 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 477 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:50:33,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-28 04:50:33,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2024-11-28 04:50:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 187 states have (on average 1.3155080213903743) internal successors, (246), 190 states have internal predecessors, (246), 23 states have call successors, (23), 11 states have call predecessors, (23), 13 states have return successors, (31), 22 states have call predecessors, (31), 22 states have call successors, (31) [2024-11-28 04:50:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 300 transitions. [2024-11-28 04:50:33,159 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 300 transitions. Word has length 46 [2024-11-28 04:50:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:33,159 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 300 transitions. [2024-11-28 04:50:33,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2024-11-28 04:50:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 300 transitions. [2024-11-28 04:50:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:50:33,160 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:33,160 INFO L218 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] [2024-11-28 04:50:33,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 04:50:33,161 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:33,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:33,161 INFO L85 PathProgramCache]: Analyzing trace with hash -334919123, now seen corresponding path program 1 times [2024-11-28 04:50:33,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:33,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849312394] [2024-11-28 04:50:33,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:33,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:50:33,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:33,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849312394] [2024-11-28 04:50:33,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849312394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:33,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765685683] [2024-11-28 04:50:33,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:33,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:33,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:33,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:33,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:50:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:33,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:50:33,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:50:33,526 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:50:33,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765685683] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:33,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:50:33,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 24 [2024-11-28 04:50:33,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028559922] [2024-11-28 04:50:33,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:33,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:50:33,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:33,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:50:33,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:50:33,891 INFO L87 Difference]: Start difference. First operand 224 states and 300 transitions. Second operand has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 18 states have internal predecessors, (54), 6 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 04:50:34,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:34,409 INFO L93 Difference]: Finished difference Result 363 states and 479 transitions. [2024-11-28 04:50:34,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 04:50:34,410 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 18 states have internal predecessors, (54), 6 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2024-11-28 04:50:34,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:34,412 INFO L225 Difference]: With dead ends: 363 [2024-11-28 04:50:34,412 INFO L226 Difference]: Without dead ends: 322 [2024-11-28 04:50:34,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:50:34,413 INFO L435 NwaCegarLoop]: 135 mSDtfsCounter, 304 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:34,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1866 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:50:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2024-11-28 04:50:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 266. [2024-11-28 04:50:34,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 223 states have (on average 1.3139013452914798) internal successors, (293), 226 states have internal predecessors, (293), 27 states have call successors, (27), 13 states have call predecessors, (27), 15 states have return successors, (35), 26 states have call predecessors, (35), 26 states have call successors, (35) [2024-11-28 04:50:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 355 transitions. [2024-11-28 04:50:34,441 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 355 transitions. Word has length 46 [2024-11-28 04:50:34,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:34,442 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 355 transitions. [2024-11-28 04:50:34,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 18 states have internal predecessors, (54), 6 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 04:50:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 355 transitions. [2024-11-28 04:50:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 04:50:34,444 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:34,444 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-11-28 04:50:34,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:34,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 04:50:34,649 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:34,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:34,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1313727045, now seen corresponding path program 1 times [2024-11-28 04:50:34,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:34,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101394645] [2024-11-28 04:50:34,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:34,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:50:34,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:34,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101394645] [2024-11-28 04:50:34,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101394645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:34,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:34,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:50:34,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963301228] [2024-11-28 04:50:34,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:34,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:50:34,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:34,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:50:34,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:50:34,697 INFO L87 Difference]: Start difference. First operand 266 states and 355 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:50:34,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:34,753 INFO L93 Difference]: Finished difference Result 535 states and 719 transitions. [2024-11-28 04:50:34,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:50:34,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-28 04:50:34,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:34,756 INFO L225 Difference]: With dead ends: 535 [2024-11-28 04:50:34,756 INFO L226 Difference]: Without dead ends: 272 [2024-11-28 04:50:34,757 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:50:34,757 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 4 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 179 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 [2024-11-28 04:50:34,758 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 179 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:50:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-28 04:50:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 268. [2024-11-28 04:50:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 225 states have (on average 1.3111111111111111) internal successors, (295), 228 states have internal predecessors, (295), 27 states have call successors, (27), 13 states have call predecessors, (27), 15 states have return successors, (35), 26 states have call predecessors, (35), 26 states have call successors, (35) [2024-11-28 04:50:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 357 transitions. [2024-11-28 04:50:34,779 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 357 transitions. Word has length 45 [2024-11-28 04:50:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:34,779 INFO L471 AbstractCegarLoop]: Abstraction has 268 states and 357 transitions. [2024-11-28 04:50:34,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:50:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 357 transitions. [2024-11-28 04:50:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:50:34,781 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:34,781 INFO L218 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] [2024-11-28 04:50:34,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 04:50:34,781 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:34,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:34,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1136545200, now seen corresponding path program 1 times [2024-11-28 04:50:34,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:34,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166588059] [2024-11-28 04:50:34,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:34,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:50:35,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:35,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166588059] [2024-11-28 04:50:35,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166588059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:35,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338919137] [2024-11-28 04:50:35,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:35,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:35,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:35,038 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:35,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:50:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:35,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 04:50:35,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:50:35,314 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:50:35,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338919137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:35,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:50:35,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2024-11-28 04:50:35,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111442610] [2024-11-28 04:50:35,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:35,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:50:35,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:35,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:50:35,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:50:35,826 INFO L87 Difference]: Start difference. First operand 268 states and 357 transitions. Second operand has 32 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-28 04:50:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:37,648 INFO L93 Difference]: Finished difference Result 433 states and 586 transitions. [2024-11-28 04:50:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 04:50:37,649 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2024-11-28 04:50:37,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:37,652 INFO L225 Difference]: With dead ends: 433 [2024-11-28 04:50:37,652 INFO L226 Difference]: Without dead ends: 408 [2024-11-28 04:50:37,654 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=309, Invalid=3231, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 04:50:37,656 INFO L435 NwaCegarLoop]: 166 mSDtfsCounter, 202 mSDsluCounter, 3698 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 3864 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:37,656 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 3864 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 04:50:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2024-11-28 04:50:37,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 322. [2024-11-28 04:50:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 268 states have (on average 1.291044776119403) internal successors, (346), 277 states have internal predecessors, (346), 32 states have call successors, (32), 12 states have call predecessors, (32), 21 states have return successors, (51), 32 states have call predecessors, (51), 31 states have call successors, (51) [2024-11-28 04:50:37,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 429 transitions. [2024-11-28 04:50:37,693 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 429 transitions. Word has length 47 [2024-11-28 04:50:37,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:37,693 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 429 transitions. [2024-11-28 04:50:37,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.75) internal successors, (49), 25 states have internal predecessors, (49), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2024-11-28 04:50:37,694 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 429 transitions. [2024-11-28 04:50:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:50:37,695 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:37,695 INFO L218 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] [2024-11-28 04:50:37,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:50:37,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 04:50:37,899 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:37,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:37,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1377800978, now seen corresponding path program 2 times [2024-11-28 04:50:37,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:37,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887815470] [2024-11-28 04:50:37,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:37,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:37,916 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:37,916 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:50:38,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887815470] [2024-11-28 04:50:38,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887815470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971173173] [2024-11-28 04:50:38,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:38,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:38,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:38,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:38,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:50:38,152 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:38,152 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:38,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 04:50:38,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:50:38,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:50:38,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971173173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:38,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:50:38,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 13] total 30 [2024-11-28 04:50:38,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354562265] [2024-11-28 04:50:38,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:38,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 04:50:38,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:38,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 04:50:38,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:50:38,841 INFO L87 Difference]: Start difference. First operand 322 states and 429 transitions. Second operand has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 24 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-28 04:50:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:40,437 INFO L93 Difference]: Finished difference Result 491 states and 685 transitions. [2024-11-28 04:50:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 04:50:40,438 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 24 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) Word has length 47 [2024-11-28 04:50:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:40,442 INFO L225 Difference]: With dead ends: 491 [2024-11-28 04:50:40,442 INFO L226 Difference]: Without dead ends: 478 [2024-11-28 04:50:40,443 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=265, Invalid=2705, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 04:50:40,444 INFO L435 NwaCegarLoop]: 194 mSDtfsCounter, 280 mSDsluCounter, 3531 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 3725 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:40,445 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 3725 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:50:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2024-11-28 04:50:40,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 337. [2024-11-28 04:50:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 277 states have (on average 1.2815884476534296) internal successors, (355), 286 states have internal predecessors, (355), 37 states have call successors, (37), 13 states have call predecessors, (37), 22 states have return successors, (67), 37 states have call predecessors, (67), 36 states have call successors, (67) [2024-11-28 04:50:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 459 transitions. [2024-11-28 04:50:40,487 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 459 transitions. Word has length 47 [2024-11-28 04:50:40,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:40,487 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 459 transitions. [2024-11-28 04:50:40,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 24 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2024-11-28 04:50:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 459 transitions. [2024-11-28 04:50:40,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:50:40,489 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:40,489 INFO L218 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] [2024-11-28 04:50:40,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 04:50:40,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:50:40,693 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:40,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash 450878593, now seen corresponding path program 1 times [2024-11-28 04:50:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:40,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023000860] [2024-11-28 04:50:40,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:40,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:50:40,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:40,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023000860] [2024-11-28 04:50:40,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023000860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:40,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:40,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:50:40,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624931149] [2024-11-28 04:50:40,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:40,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:50:40,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:40,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:50:40,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:50:40,794 INFO L87 Difference]: Start difference. First operand 337 states and 459 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:50:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:40,873 INFO L93 Difference]: Finished difference Result 677 states and 927 transitions. [2024-11-28 04:50:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:50:40,874 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2024-11-28 04:50:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:40,876 INFO L225 Difference]: With dead ends: 677 [2024-11-28 04:50:40,877 INFO L226 Difference]: Without dead ends: 343 [2024-11-28 04:50:40,878 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:50:40,878 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 9 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:40,879 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 277 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:50:40,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-28 04:50:40,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 335. [2024-11-28 04:50:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 275 states have (on average 1.2763636363636364) internal successors, (351), 284 states have internal predecessors, (351), 37 states have call successors, (37), 13 states have call predecessors, (37), 22 states have return successors, (67), 37 states have call predecessors, (67), 36 states have call successors, (67) [2024-11-28 04:50:40,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 455 transitions. [2024-11-28 04:50:40,906 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 455 transitions. Word has length 46 [2024-11-28 04:50:40,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:40,906 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 455 transitions. [2024-11-28 04:50:40,907 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:50:40,907 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 455 transitions. [2024-11-28 04:50:40,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:50:40,908 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:40,908 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-11-28 04:50:40,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 04:50:40,908 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:40,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash 265932678, now seen corresponding path program 1 times [2024-11-28 04:50:40,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:40,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077257090] [2024-11-28 04:50:40,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:50:41,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:41,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077257090] [2024-11-28 04:50:41,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077257090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:41,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088549887] [2024-11-28 04:50:41,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:41,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:41,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:41,030 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:41,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:50:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:41,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:50:41,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:50:41,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:50:41,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088549887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:41,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:50:41,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 15 [2024-11-28 04:50:41,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149868173] [2024-11-28 04:50:41,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:41,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:50:41,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:41,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:50:41,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:50:41,350 INFO L87 Difference]: Start difference. First operand 335 states and 455 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:50:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:41,625 INFO L93 Difference]: Finished difference Result 471 states and 632 transitions. [2024-11-28 04:50:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:50:41,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2024-11-28 04:50:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:41,628 INFO L225 Difference]: With dead ends: 471 [2024-11-28 04:50:41,629 INFO L226 Difference]: Without dead ends: 397 [2024-11-28 04:50:41,629 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:50:41,630 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 102 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:41,632 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 1142 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:50:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-11-28 04:50:41,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 379. [2024-11-28 04:50:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 313 states have (on average 1.2779552715654952) internal successors, (400), 324 states have internal predecessors, (400), 39 states have call successors, (39), 15 states have call predecessors, (39), 26 states have return successors, (68), 39 states have call predecessors, (68), 38 states have call successors, (68) [2024-11-28 04:50:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 507 transitions. [2024-11-28 04:50:41,664 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 507 transitions. Word has length 46 [2024-11-28 04:50:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:41,664 INFO L471 AbstractCegarLoop]: Abstraction has 379 states and 507 transitions. [2024-11-28 04:50:41,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:50:41,665 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 507 transitions. [2024-11-28 04:50:41,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:50:41,666 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:41,666 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-11-28 04:50:41,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 04:50:41,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:50:41,867 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:41,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:41,868 INFO L85 PathProgramCache]: Analyzing trace with hash -127094332, now seen corresponding path program 1 times [2024-11-28 04:50:41,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:41,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549154905] [2024-11-28 04:50:41,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:41,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 04:50:42,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:42,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549154905] [2024-11-28 04:50:42,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549154905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:42,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:42,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 04:50:42,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453798979] [2024-11-28 04:50:42,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:42,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:50:42,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:42,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:50:42,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:50:42,135 INFO L87 Difference]: Start difference. First operand 379 states and 507 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:50:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:42,241 INFO L93 Difference]: Finished difference Result 385 states and 512 transitions. [2024-11-28 04:50:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:50:42,242 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2024-11-28 04:50:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:42,244 INFO L225 Difference]: With dead ends: 385 [2024-11-28 04:50:42,244 INFO L226 Difference]: Without dead ends: 383 [2024-11-28 04:50:42,245 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:50:42,245 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 14 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:42,246 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 521 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-11-28 04:50:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2024-11-28 04:50:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 316 states have (on average 1.2753164556962024) internal successors, (403), 327 states have internal predecessors, (403), 39 states have call successors, (39), 16 states have call predecessors, (39), 27 states have return successors, (68), 39 states have call predecessors, (68), 38 states have call successors, (68) [2024-11-28 04:50:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 510 transitions. [2024-11-28 04:50:42,279 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 510 transitions. Word has length 46 [2024-11-28 04:50:42,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:42,280 INFO L471 AbstractCegarLoop]: Abstraction has 383 states and 510 transitions. [2024-11-28 04:50:42,280 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:50:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 510 transitions. [2024-11-28 04:50:42,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 04:50:42,282 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:42,283 INFO L218 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] [2024-11-28 04:50:42,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 04:50:42,283 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:42,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:42,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1472312230, now seen corresponding path program 1 times [2024-11-28 04:50:42,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:42,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870533303] [2024-11-28 04:50:42,284 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:42,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:50:42,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:42,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870533303] [2024-11-28 04:50:42,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870533303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:42,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011965684] [2024-11-28 04:50:42,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:42,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:42,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:42,452 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:42,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:50:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:42,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 04:50:42,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:50:42,666 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:50:42,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011965684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:42,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:50:42,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 10] total 23 [2024-11-28 04:50:42,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992765127] [2024-11-28 04:50:42,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:42,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:50:42,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:42,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:50:42,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:50:42,982 INFO L87 Difference]: Start difference. First operand 383 states and 510 transitions. Second operand has 23 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-28 04:50:43,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:43,583 INFO L93 Difference]: Finished difference Result 482 states and 659 transitions. [2024-11-28 04:50:43,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:50:43,584 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 49 [2024-11-28 04:50:43,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:43,587 INFO L225 Difference]: With dead ends: 482 [2024-11-28 04:50:43,587 INFO L226 Difference]: Without dead ends: 444 [2024-11-28 04:50:43,588 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:50:43,589 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 227 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:43,589 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1573 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:50:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2024-11-28 04:50:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 382. [2024-11-28 04:50:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 313 states have (on average 1.2715654952076678) internal successors, (398), 327 states have internal predecessors, (398), 40 states have call successors, (40), 14 states have call predecessors, (40), 28 states have return successors, (80), 40 states have call predecessors, (80), 39 states have call successors, (80) [2024-11-28 04:50:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 518 transitions. [2024-11-28 04:50:43,631 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 518 transitions. Word has length 49 [2024-11-28 04:50:43,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:43,631 INFO L471 AbstractCegarLoop]: Abstraction has 382 states and 518 transitions. [2024-11-28 04:50:43,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-28 04:50:43,631 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 518 transitions. [2024-11-28 04:50:43,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 04:50:43,634 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:43,634 INFO L218 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, 1, 1, 1] [2024-11-28 04:50:43,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:43,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:50:43,838 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:43,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:43,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1014637188, now seen corresponding path program 1 times [2024-11-28 04:50:43,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:43,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626179589] [2024-11-28 04:50:43,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:43,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:50:43,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:43,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626179589] [2024-11-28 04:50:43,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626179589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:43,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:43,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:50:43,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465878161] [2024-11-28 04:50:43,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:43,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:50:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:43,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:50:43,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:50:43,927 INFO L87 Difference]: Start difference. First operand 382 states and 518 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:50:44,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:44,025 INFO L93 Difference]: Finished difference Result 430 states and 593 transitions. [2024-11-28 04:50:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:50:44,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2024-11-28 04:50:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:44,029 INFO L225 Difference]: With dead ends: 430 [2024-11-28 04:50:44,029 INFO L226 Difference]: Without dead ends: 428 [2024-11-28 04:50:44,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:50:44,030 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 11 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:44,030 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 352 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2024-11-28 04:50:44,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 404. [2024-11-28 04:50:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 328 states have (on average 1.295731707317073) internal successors, (425), 348 states have internal predecessors, (425), 46 states have call successors, (46), 15 states have call predecessors, (46), 29 states have return successors, (86), 40 states have call predecessors, (86), 45 states have call successors, (86) [2024-11-28 04:50:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 557 transitions. [2024-11-28 04:50:44,069 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 557 transitions. Word has length 53 [2024-11-28 04:50:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:44,069 INFO L471 AbstractCegarLoop]: Abstraction has 404 states and 557 transitions. [2024-11-28 04:50:44,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:50:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 557 transitions. [2024-11-28 04:50:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 04:50:44,072 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:44,072 INFO L218 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, 1, 1, 1, 1] [2024-11-28 04:50:44,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 04:50:44,072 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:44,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:44,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1591972594, now seen corresponding path program 1 times [2024-11-28 04:50:44,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:44,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440872968] [2024-11-28 04:50:44,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:44,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:50:44,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:44,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440872968] [2024-11-28 04:50:44,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440872968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:44,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397943733] [2024-11-28 04:50:44,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:44,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:44,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:44,388 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:44,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:50:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:44,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 04:50:44,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:50:44,512 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:50:44,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397943733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:44,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:50:44,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-28 04:50:44,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112103332] [2024-11-28 04:50:44,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:44,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:50:44,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:44,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:50:44,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:50:44,878 INFO L87 Difference]: Start difference. First operand 404 states and 557 transitions. Second operand has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 04:50:45,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:45,675 INFO L93 Difference]: Finished difference Result 479 states and 677 transitions. [2024-11-28 04:50:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:50:45,676 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2024-11-28 04:50:45,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:45,679 INFO L225 Difference]: With dead ends: 479 [2024-11-28 04:50:45,679 INFO L226 Difference]: Without dead ends: 447 [2024-11-28 04:50:45,680 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 04:50:45,680 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 175 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:45,680 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 1942 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:50:45,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2024-11-28 04:50:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 390. [2024-11-28 04:50:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 318 states have (on average 1.3050314465408805) internal successors, (415), 337 states have internal predecessors, (415), 44 states have call successors, (44), 13 states have call predecessors, (44), 27 states have return successors, (84), 39 states have call predecessors, (84), 43 states have call successors, (84) [2024-11-28 04:50:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 543 transitions. [2024-11-28 04:50:45,716 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 543 transitions. Word has length 54 [2024-11-28 04:50:45,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:45,716 INFO L471 AbstractCegarLoop]: Abstraction has 390 states and 543 transitions. [2024-11-28 04:50:45,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 04:50:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 543 transitions. [2024-11-28 04:50:45,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 04:50:45,718 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:45,718 INFO L218 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, 1, 1, 1, 1] [2024-11-28 04:50:45,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:45,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:45,922 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:45,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:45,923 INFO L85 PathProgramCache]: Analyzing trace with hash -55598903, now seen corresponding path program 1 times [2024-11-28 04:50:45,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:45,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189514343] [2024-11-28 04:50:45,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:45,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:50:46,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:46,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189514343] [2024-11-28 04:50:46,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189514343] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:46,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:46,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 04:50:46,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719295256] [2024-11-28 04:50:46,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:46,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:50:46,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:46,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:50:46,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:50:46,067 INFO L87 Difference]: Start difference. First operand 390 states and 543 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:50:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:46,271 INFO L93 Difference]: Finished difference Result 848 states and 1245 transitions. [2024-11-28 04:50:46,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:50:46,271 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-11-28 04:50:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:46,274 INFO L225 Difference]: With dead ends: 848 [2024-11-28 04:50:46,275 INFO L226 Difference]: Without dead ends: 598 [2024-11-28 04:50:46,276 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:50:46,277 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 25 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:46,278 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 675 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:46,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2024-11-28 04:50:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 469. [2024-11-28 04:50:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 390 states have (on average 1.2846153846153847) internal successors, (501), 409 states have internal predecessors, (501), 51 states have call successors, (51), 13 states have call predecessors, (51), 27 states have return successors, (91), 46 states have call predecessors, (91), 50 states have call successors, (91) [2024-11-28 04:50:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 643 transitions. [2024-11-28 04:50:46,320 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 643 transitions. Word has length 54 [2024-11-28 04:50:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:46,320 INFO L471 AbstractCegarLoop]: Abstraction has 469 states and 643 transitions. [2024-11-28 04:50:46,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:50:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 643 transitions. [2024-11-28 04:50:46,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 04:50:46,322 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:46,322 INFO L218 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, 1, 1, 1, 1] [2024-11-28 04:50:46,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-28 04:50:46,322 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:46,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash 776629554, now seen corresponding path program 2 times [2024-11-28 04:50:46,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:46,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805129118] [2024-11-28 04:50:46,323 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:46,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:46,358 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:46,358 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:50:47,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:47,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805129118] [2024-11-28 04:50:47,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805129118] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:47,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968799906] [2024-11-28 04:50:47,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:47,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:47,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:47,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:47,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:50:47,399 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:47,400 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:47,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:50:47,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:50:47,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:50:55,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968799906] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:55,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:50:55,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 14] total 42 [2024-11-28 04:50:55,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124330379] [2024-11-28 04:50:55,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:55,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-28 04:50:55,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:55,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-28 04:50:55,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1608, Unknown=2, NotChecked=0, Total=1722 [2024-11-28 04:50:55,356 INFO L87 Difference]: Start difference. First operand 469 states and 643 transitions. Second operand has 42 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 7 states have call successors, (10), 2 states have call predecessors, (10), 8 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 04:50:58,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:58,951 INFO L93 Difference]: Finished difference Result 616 states and 897 transitions. [2024-11-28 04:50:58,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 04:50:58,956 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 7 states have call successors, (10), 2 states have call predecessors, (10), 8 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) Word has length 54 [2024-11-28 04:50:58,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:58,960 INFO L225 Difference]: With dead ends: 616 [2024-11-28 04:50:58,960 INFO L226 Difference]: Without dead ends: 569 [2024-11-28 04:50:58,963 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=302, Invalid=4118, Unknown=2, NotChecked=0, Total=4422 [2024-11-28 04:50:58,965 INFO L435 NwaCegarLoop]: 126 mSDtfsCounter, 140 mSDsluCounter, 3653 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 3779 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:58,966 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 3779 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1894 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 04:50:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2024-11-28 04:50:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 461. [2024-11-28 04:50:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 383 states have (on average 1.2898172323759791) internal successors, (494), 404 states have internal predecessors, (494), 50 states have call successors, (50), 11 states have call predecessors, (50), 27 states have return successors, (90), 45 states have call predecessors, (90), 49 states have call successors, (90) [2024-11-28 04:50:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 634 transitions. [2024-11-28 04:50:59,018 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 634 transitions. Word has length 54 [2024-11-28 04:50:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:59,018 INFO L471 AbstractCegarLoop]: Abstraction has 461 states and 634 transitions. [2024-11-28 04:50:59,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 7 states have call successors, (10), 2 states have call predecessors, (10), 8 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 04:50:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 634 transitions. [2024-11-28 04:50:59,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 04:50:59,021 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:59,021 INFO L218 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, 1, 1, 1, 1, 1] [2024-11-28 04:50:59,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:59,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:59,225 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:59,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1966633487, now seen corresponding path program 1 times [2024-11-28 04:50:59,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:59,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339245350] [2024-11-28 04:50:59,226 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:59,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:50:59,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:59,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339245350] [2024-11-28 04:50:59,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339245350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:59,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:59,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:50:59,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859616558] [2024-11-28 04:50:59,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:59,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:50:59,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:59,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:50:59,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:50:59,379 INFO L87 Difference]: Start difference. First operand 461 states and 634 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:50:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:59,530 INFO L93 Difference]: Finished difference Result 521 states and 725 transitions. [2024-11-28 04:50:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:50:59,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2024-11-28 04:50:59,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:59,534 INFO L225 Difference]: With dead ends: 521 [2024-11-28 04:50:59,536 INFO L226 Difference]: Without dead ends: 519 [2024-11-28 04:50:59,536 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:50:59,537 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 11 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:59,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 458 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2024-11-28 04:50:59,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 467. [2024-11-28 04:50:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 389 states have (on average 1.300771208226221) internal successors, (506), 410 states have internal predecessors, (506), 50 states have call successors, (50), 11 states have call predecessors, (50), 27 states have return successors, (90), 45 states have call predecessors, (90), 49 states have call successors, (90) [2024-11-28 04:50:59,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 646 transitions. [2024-11-28 04:50:59,582 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 646 transitions. Word has length 55 [2024-11-28 04:50:59,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:59,583 INFO L471 AbstractCegarLoop]: Abstraction has 467 states and 646 transitions. [2024-11-28 04:50:59,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:50:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 646 transitions. [2024-11-28 04:50:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 04:50:59,584 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:59,585 INFO L218 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, 1, 1, 1, 1, 1] [2024-11-28 04:50:59,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-28 04:50:59,586 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:59,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:59,586 INFO L85 PathProgramCache]: Analyzing trace with hash 884577979, now seen corresponding path program 1 times [2024-11-28 04:50:59,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:59,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028744628] [2024-11-28 04:50:59,587 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:59,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:50:59,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:59,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028744628] [2024-11-28 04:50:59,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028744628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:59,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114508236] [2024-11-28 04:50:59,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:59,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:59,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:59,799 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:59,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:50:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:59,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:50:59,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:50:59,960 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:50:59,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114508236] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:59,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:50:59,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2024-11-28 04:50:59,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139083337] [2024-11-28 04:50:59,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:59,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:50:59,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:59,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:50:59,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:50:59,961 INFO L87 Difference]: Start difference. First operand 467 states and 646 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:51:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:00,111 INFO L93 Difference]: Finished difference Result 842 states and 1170 transitions. [2024-11-28 04:51:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:51:00,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-11-28 04:51:00,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:00,115 INFO L225 Difference]: With dead ends: 842 [2024-11-28 04:51:00,115 INFO L226 Difference]: Without dead ends: 594 [2024-11-28 04:51:00,117 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:51:00,117 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 18 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:00,118 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 434 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2024-11-28 04:51:00,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 461. [2024-11-28 04:51:00,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 383 states have (on average 1.2898172323759791) internal successors, (494), 404 states have internal predecessors, (494), 50 states have call successors, (50), 11 states have call predecessors, (50), 27 states have return successors, (90), 45 states have call predecessors, (90), 49 states have call successors, (90) [2024-11-28 04:51:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 634 transitions. [2024-11-28 04:51:00,166 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 634 transitions. Word has length 55 [2024-11-28 04:51:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:00,167 INFO L471 AbstractCegarLoop]: Abstraction has 461 states and 634 transitions. [2024-11-28 04:51:00,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:51:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 634 transitions. [2024-11-28 04:51:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 04:51:00,170 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:00,170 INFO L218 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, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:00,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:51:00,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 04:51:00,375 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:00,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:00,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1223583417, now seen corresponding path program 1 times [2024-11-28 04:51:00,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:00,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724748242] [2024-11-28 04:51:00,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:00,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:51:00,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:00,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724748242] [2024-11-28 04:51:00,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724748242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:00,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894944982] [2024-11-28 04:51:00,591 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:00,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:00,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:00,595 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:00,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:51:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:00,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:51:00,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:51:00,858 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:00,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894944982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:00,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:51:00,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9] total 16 [2024-11-28 04:51:00,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870258026] [2024-11-28 04:51:00,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:00,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:51:00,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:00,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:51:00,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:51:00,860 INFO L87 Difference]: Start difference. First operand 461 states and 634 transitions. Second operand has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:51:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:01,084 INFO L93 Difference]: Finished difference Result 577 states and 787 transitions. [2024-11-28 04:51:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:51:01,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2024-11-28 04:51:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:01,087 INFO L225 Difference]: With dead ends: 577 [2024-11-28 04:51:01,087 INFO L226 Difference]: Without dead ends: 473 [2024-11-28 04:51:01,088 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:51:01,088 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 66 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:01,089 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 969 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:01,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2024-11-28 04:51:01,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 459. [2024-11-28 04:51:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 381 states have (on average 1.2808398950131235) internal successors, (488), 402 states have internal predecessors, (488), 50 states have call successors, (50), 11 states have call predecessors, (50), 27 states have return successors, (90), 45 states have call predecessors, (90), 49 states have call successors, (90) [2024-11-28 04:51:01,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 628 transitions. [2024-11-28 04:51:01,131 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 628 transitions. Word has length 56 [2024-11-28 04:51:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:01,131 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 628 transitions. [2024-11-28 04:51:01,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:51:01,131 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 628 transitions. [2024-11-28 04:51:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 04:51:01,133 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:01,133 INFO L218 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:01,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:51:01,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 04:51:01,337 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:01,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:01,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1099804598, now seen corresponding path program 1 times [2024-11-28 04:51:01,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:01,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045636798] [2024-11-28 04:51:01,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:01,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:51:01,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:01,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045636798] [2024-11-28 04:51:01,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045636798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:01,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565527149] [2024-11-28 04:51:01,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:01,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:01,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:01,564 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:01,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:51:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:01,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 04:51:01,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-28 04:51:01,769 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:01,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565527149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:01,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:51:01,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 14 [2024-11-28 04:51:01,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070655543] [2024-11-28 04:51:01,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:01,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:51:01,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:01,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:51:01,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:51:01,772 INFO L87 Difference]: Start difference. First operand 459 states and 628 transitions. Second operand has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:51:01,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:01,972 INFO L93 Difference]: Finished difference Result 571 states and 774 transitions. [2024-11-28 04:51:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:51:01,972 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 57 [2024-11-28 04:51:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:01,975 INFO L225 Difference]: With dead ends: 571 [2024-11-28 04:51:01,975 INFO L226 Difference]: Without dead ends: 451 [2024-11-28 04:51:01,976 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:51:01,977 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 55 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:01,977 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 884 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-11-28 04:51:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 437. [2024-11-28 04:51:02,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 361 states have (on average 1.2853185595567866) internal successors, (464), 382 states have internal predecessors, (464), 48 states have call successors, (48), 11 states have call predecessors, (48), 27 states have return successors, (88), 43 states have call predecessors, (88), 47 states have call successors, (88) [2024-11-28 04:51:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 600 transitions. [2024-11-28 04:51:02,052 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 600 transitions. Word has length 57 [2024-11-28 04:51:02,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:02,052 INFO L471 AbstractCegarLoop]: Abstraction has 437 states and 600 transitions. [2024-11-28 04:51:02,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:51:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 600 transitions. [2024-11-28 04:51:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 04:51:02,054 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:02,054 INFO L218 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, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:02,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:02,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:02,258 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:02,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:02,259 INFO L85 PathProgramCache]: Analyzing trace with hash -229925546, now seen corresponding path program 1 times [2024-11-28 04:51:02,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:02,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255594910] [2024-11-28 04:51:02,259 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:02,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:51:02,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:02,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255594910] [2024-11-28 04:51:02,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255594910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:02,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:02,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 04:51:02,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486535772] [2024-11-28 04:51:02,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:02,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:51:02,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:02,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:51:02,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:51:02,455 INFO L87 Difference]: Start difference. First operand 437 states and 600 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:51:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:02,628 INFO L93 Difference]: Finished difference Result 635 states and 861 transitions. [2024-11-28 04:51:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:51:02,629 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2024-11-28 04:51:02,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:02,631 INFO L225 Difference]: With dead ends: 635 [2024-11-28 04:51:02,632 INFO L226 Difference]: Without dead ends: 435 [2024-11-28 04:51:02,633 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:51:02,633 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 58 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:02,633 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 763 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2024-11-28 04:51:02,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 426. [2024-11-28 04:51:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 351 states have (on average 1.2820512820512822) internal successors, (450), 372 states have internal predecessors, (450), 47 states have call successors, (47), 11 states have call predecessors, (47), 27 states have return successors, (87), 42 states have call predecessors, (87), 46 states have call successors, (87) [2024-11-28 04:51:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 584 transitions. [2024-11-28 04:51:02,672 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 584 transitions. Word has length 57 [2024-11-28 04:51:02,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:02,672 INFO L471 AbstractCegarLoop]: Abstraction has 426 states and 584 transitions. [2024-11-28 04:51:02,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:51:02,673 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 584 transitions. [2024-11-28 04:51:02,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 04:51:02,674 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:02,674 INFO L218 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:02,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-28 04:51:02,675 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:02,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash -444933933, now seen corresponding path program 1 times [2024-11-28 04:51:02,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:02,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241113988] [2024-11-28 04:51:02,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:02,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:51:02,700 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 04:51:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:51:02,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 04:51:02,754 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 04:51:02,755 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 04:51:02,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-28 04:51:02,761 INFO L422 BasicCegarLoop]: Path program histogram: [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] [2024-11-28 04:51:02,808 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 04:51:02,811 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:51:02 BoogieIcfgContainer [2024-11-28 04:51:02,814 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 04:51:02,815 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 04:51:02,815 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 04:51:02,815 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 04:51:02,816 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:50:25" (3/4) ... [2024-11-28 04:51:02,818 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-28 04:51:02,819 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 04:51:02,820 INFO L158 Benchmark]: Toolchain (without parser) took 37925.05ms. Allocated memory was 142.6MB in the beginning and 411.0MB in the end (delta: 268.4MB). Free memory was 118.0MB in the beginning and 251.3MB in the end (delta: -133.3MB). Peak memory consumption was 133.4MB. Max. memory is 16.1GB. [2024-11-28 04:51:02,820 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 142.6MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:51:02,820 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.69ms. Allocated memory is still 142.6MB. Free memory was 117.7MB in the beginning and 104.1MB in the end (delta: 13.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:51:02,821 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.21ms. Allocated memory is still 142.6MB. Free memory was 104.1MB in the beginning and 103.0MB in the end (delta: 1.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:51:02,821 INFO L158 Benchmark]: Boogie Preprocessor took 60.09ms. Allocated memory is still 142.6MB. Free memory was 103.0MB in the beginning and 101.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:51:02,821 INFO L158 Benchmark]: RCFGBuilder took 558.50ms. Allocated memory is still 142.6MB. Free memory was 101.3MB in the beginning and 82.5MB in the end (delta: 18.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:51:02,821 INFO L158 Benchmark]: TraceAbstraction took 36960.94ms. Allocated memory was 142.6MB in the beginning and 411.0MB in the end (delta: 268.4MB). Free memory was 81.7MB in the beginning and 251.3MB in the end (delta: -169.6MB). Peak memory consumption was 99.8MB. Max. memory is 16.1GB. [2024-11-28 04:51:02,822 INFO L158 Benchmark]: Witness Printer took 4.24ms. Allocated memory is still 411.0MB. Free memory was 251.3MB in the beginning and 251.3MB in the end (delta: 81.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:51:02,823 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 142.6MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 293.69ms. Allocated memory is still 142.6MB. Free memory was 117.7MB in the beginning and 104.1MB in the end (delta: 13.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.21ms. Allocated memory is still 142.6MB. Free memory was 104.1MB in the beginning and 103.0MB in the end (delta: 1.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 60.09ms. Allocated memory is still 142.6MB. Free memory was 103.0MB in the beginning and 101.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 558.50ms. Allocated memory is still 142.6MB. Free memory was 101.3MB in the beginning and 82.5MB in the end (delta: 18.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 36960.94ms. Allocated memory was 142.6MB in the beginning and 411.0MB in the end (delta: 268.4MB). Free memory was 81.7MB in the beginning and 251.3MB in the end (delta: -169.6MB). Peak memory consumption was 99.8MB. Max. memory is 16.1GB. * Witness Printer took 4.24ms. Allocated memory is still 411.0MB. Free memory was 251.3MB in the beginning and 251.3MB in the end (delta: 81.0kB). 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 - 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 111, overapproximation of bitwiseOr at line 114, 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_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=127, eb=127] [L242] 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] [L242] RET, EXPR base2flt(0, 0) VAL [ea=127, eb=127] [L242] zero = base2flt(0, 0) [L243] 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] [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] [L243] RET, EXPR base2flt(ma, ea) VAL [ea=127, eb=127, ma=4328521728] [L243] a = base2flt(ma, ea) [L244] 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] [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] [L244] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, ea=127, eb=127, ma=4328521728, mb=33554432] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=4294967295] [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 [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295] [L95] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=127, ma=16777215] [L111] EXPR ma | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, b=4294967295, ea=127] [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, eb=127, ma=16777217, mb=16777215] [L114] EXPR mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, eb=127, ma=16777217] [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 [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, eb=127, ma=16777217, mb=-4278190080] [L116] delta = ea - eb VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, delta=0, ea=127, ma=16777217, mb=-4278190080] [L117] COND FALSE !(!(delta < sizeof(mb) * 8)) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, delta=0, ea=127, ma=16777217, mb=-4278190080] [L118] EXPR mb >> delta VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, ma=16777217] [L118] mb = mb >> delta [L120] COND FALSE !(! mb) [L126] ma = ma + mb VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, ma=-4261412863] [L127] ma & (1U << 25U) VAL [\old(a)=4294967295, \old(b)=4294967295, a=4294967295, ea=127, ma=-4261412863] [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 4 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 36.8s, OverallIterations: 28, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 12.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2298 SdHoareTripleChecker+Valid, 7.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2140 mSDsluCounter, 32790 SdHoareTripleChecker+Invalid, 6.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 29790 mSDsCounter, 252 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7548 IncrementalHoareTripleChecker+Invalid, 7800 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 252 mSolverCounterUnsat, 3000 mSDtfsCounter, 7548 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1425 GetRequests, 937 SyntacticMatches, 5 SemanticMatches, 483 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2471 ImplicationChecksByTransitivity, 15.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=469occurred in iteration=21, InterpolantAutomatonStates: 384, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 27 MinimizatonAttempts, 1121 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 18.5s InterpolantComputationTime, 1975 NumberOfCodeBlocks, 1958 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 2246 ConstructedInterpolants, 1 QuantifiedInterpolants, 5006 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1981 ConjunctsInSsa, 326 ConjunctsInUnsatCore, 48 InterpolantComputations, 19 PerfectInterpolantSequences, 802/922 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, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-28 04:51:02,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally 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_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB --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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:51:05,478 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:51:05,612 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-28 04:51:05,621 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:51:05,622 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:51:05,662 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:51:05,662 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:51:05,662 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:51:05,663 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:51:05,663 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:51:05,663 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:51:05,663 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:51:05,664 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:51:05,664 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:51:05,664 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:51:05,664 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:51:05,664 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:51:05,665 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:51:05,665 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:51:05,665 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:51:05,665 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:51:05,665 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:51:05,665 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:51:05,666 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:51:05,666 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 04:51:05,666 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 04:51:05,666 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:51:05,666 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:51:05,666 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:51:05,667 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:51:05,667 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:51:05,667 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:51:05,667 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:51:05,667 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:51:05,667 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:51:05,668 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:51:05,668 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:51:05,668 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:51:05,668 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:51:05,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:51:05,668 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:51:05,669 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:51:05,669 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:51:05,669 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:51:05,669 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 04:51:05,669 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 04:51:05,669 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:51:05,669 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:51:05,669 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:51:05,670 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:51:05,670 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_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2024-11-28 04:51:05,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:51:06,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:51:06,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:51:06,009 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:51:06,010 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:51:06,011 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2024-11-28 04:51:09,085 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/data/59c09bc27/72669cc3e6424f33983113179c6a5efb/FLAGa3ab37b80 [2024-11-28 04:51:09,334 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:51:09,335 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2024-11-28 04:51:09,350 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/data/59c09bc27/72669cc3e6424f33983113179c6a5efb/FLAGa3ab37b80 [2024-11-28 04:51:09,375 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/data/59c09bc27/72669cc3e6424f33983113179c6a5efb [2024-11-28 04:51:09,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:51:09,382 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:51:09,385 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:51:09,385 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:51:09,394 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:51:09,395 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,397 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@481e9ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09, skipping insertion in model container [2024-11-28 04:51:09,399 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,426 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:51:09,620 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_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-28 04:51:09,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:51:09,726 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:51:09,742 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_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2024-11-28 04:51:09,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:51:09,802 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:51:09,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09 WrapperNode [2024-11-28 04:51:09,802 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:51:09,803 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:51:09,804 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:51:09,805 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:51:09,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,826 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,848 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-28 04:51:09,851 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:51:09,852 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:51:09,852 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:51:09,852 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:51:09,862 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,862 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,867 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,894 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]. [2024-11-28 04:51:09,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,898 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,914 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,915 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,924 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,925 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,930 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,933 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:51:09,936 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:51:09,938 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:51:09,938 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:51:09,940 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (1/1) ... [2024-11-28 04:51:09,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:51:09,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:09,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:51:09,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:51:10,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:51:10,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 04:51:10,017 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-28 04:51:10,017 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-28 04:51:10,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:51:10,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:51:10,018 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-28 04:51:10,018 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-28 04:51:10,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:51:10,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:51:10,123 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:51:10,125 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:51:10,481 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2024-11-28 04:51:10,481 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:51:10,498 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:51:10,500 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 04:51:10,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:51:10 BoogieIcfgContainer [2024-11-28 04:51:10,501 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:51:10,505 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:51:10,505 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:51:10,511 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:51:10,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:51:09" (1/3) ... [2024-11-28 04:51:10,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f968bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:51:10, skipping insertion in model container [2024-11-28 04:51:10,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:51:09" (2/3) ... [2024-11-28 04:51:10,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f968bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:51:10, skipping insertion in model container [2024-11-28 04:51:10,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:51:10" (3/3) ... [2024-11-28 04:51:10,516 INFO L128 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2024-11-28 04:51:10,533 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:51:10,535 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG soft_float_4-2a.c.cil.c that has 4 procedures, 52 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 04:51:10,609 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:51:10,627 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;@f6895d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:51:10,627 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:51:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:51:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 04:51:10,640 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:10,641 INFO L218 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] [2024-11-28 04:51:10,642 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:10,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:10,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1202548967, now seen corresponding path program 1 times [2024-11-28 04:51:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:10,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670713570] [2024-11-28 04:51:10,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:10,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:10,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:10,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:10,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:51:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:10,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:51:10,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:51:11,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:51:11,193 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:11,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670713570] [2024-11-28 04:51:11,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670713570] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:11,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:11,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-28 04:51:11,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632709416] [2024-11-28 04:51:11,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:11,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:51:11,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:11,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:51:11,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:51:11,231 INFO L87 Difference]: Start difference. First operand has 52 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 40 states have internal predecessors, (59), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:51:11,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:11,490 INFO L93 Difference]: Finished difference Result 124 states and 192 transitions. [2024-11-28 04:51:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:51:11,492 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-28 04:51:11,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:11,500 INFO L225 Difference]: With dead ends: 124 [2024-11-28 04:51:11,500 INFO L226 Difference]: Without dead ends: 69 [2024-11-28 04:51:11,504 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:51:11,507 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 15 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:11,508 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 486 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-28 04:51:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2024-11-28 04:51:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 47 states have internal predecessors, (60), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-28 04:51:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2024-11-28 04:51:11,568 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 31 [2024-11-28 04:51:11,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:11,569 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2024-11-28 04:51:11,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:51:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2024-11-28 04:51:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 04:51:11,571 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:11,571 INFO L218 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] [2024-11-28 04:51:11,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:51:11,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:11,772 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:11,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash -953008417, now seen corresponding path program 1 times [2024-11-28 04:51:11,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:11,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276420144] [2024-11-28 04:51:11,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:11,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:11,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:11,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:11,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:51:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:11,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 04:51:11,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:51:12,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:51:12,336 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:12,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276420144] [2024-11-28 04:51:12,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276420144] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:12,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:51:12,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 16 [2024-11-28 04:51:12,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262104130] [2024-11-28 04:51:12,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:12,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:51:12,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:12,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:51:12,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:51:12,343 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:51:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:12,566 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2024-11-28 04:51:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:51:12,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2024-11-28 04:51:12,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:12,572 INFO L225 Difference]: With dead ends: 125 [2024-11-28 04:51:12,575 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 04:51:12,576 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:51:12,577 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 24 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:12,577 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 479 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:51:12,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 04:51:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2024-11-28 04:51:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.296875) internal successors, (83), 66 states have internal predecessors, (83), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-28 04:51:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 114 transitions. [2024-11-28 04:51:12,610 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 114 transitions. Word has length 34 [2024-11-28 04:51:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:12,611 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 114 transitions. [2024-11-28 04:51:12,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:51:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 114 transitions. [2024-11-28 04:51:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 04:51:12,613 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:12,613 INFO L218 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] [2024-11-28 04:51:12,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 04:51:12,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:12,814 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:12,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:12,815 INFO L85 PathProgramCache]: Analyzing trace with hash -895750115, now seen corresponding path program 1 times [2024-11-28 04:51:12,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:12,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011850709] [2024-11-28 04:51:12,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:12,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:12,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:12,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:12,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:51:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:12,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:51:12,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:13,000 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:51:13,000 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:13,000 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:13,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011850709] [2024-11-28 04:51:13,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011850709] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:13,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:13,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 04:51:13,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560047869] [2024-11-28 04:51:13,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:13,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:51:13,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:13,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:51:13,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:51:13,002 INFO L87 Difference]: Start difference. First operand 86 states and 114 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:51:13,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:13,147 INFO L93 Difference]: Finished difference Result 124 states and 163 transitions. [2024-11-28 04:51:13,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:51:13,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2024-11-28 04:51:13,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:13,150 INFO L225 Difference]: With dead ends: 124 [2024-11-28 04:51:13,150 INFO L226 Difference]: Without dead ends: 84 [2024-11-28 04:51:13,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:51:13,151 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 12 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:13,153 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 405 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:13,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-28 04:51:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2024-11-28 04:51:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 53 states have internal predecessors, (66), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-28 04:51:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2024-11-28 04:51:13,174 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 34 [2024-11-28 04:51:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:13,175 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2024-11-28 04:51:13,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:51:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2024-11-28 04:51:13,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 04:51:13,176 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:13,176 INFO L218 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] [2024-11-28 04:51:13,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:51:13,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:13,377 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:13,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:13,377 INFO L85 PathProgramCache]: Analyzing trace with hash 184823957, now seen corresponding path program 2 times [2024-11-28 04:51:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:13,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763806449] [2024-11-28 04:51:13,378 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:51:13,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:13,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:13,384 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:13,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:51:13,440 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:51:13,440 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:13,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:51:13,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:51:13,672 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:13,672 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:13,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763806449] [2024-11-28 04:51:13,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763806449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:13,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:13,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-28 04:51:13,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019388446] [2024-11-28 04:51:13,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:13,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:51:13,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:13,674 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:51:13,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:51:13,674 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:51:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:14,106 INFO L93 Difference]: Finished difference Result 144 states and 190 transitions. [2024-11-28 04:51:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:51:14,107 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2024-11-28 04:51:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:14,109 INFO L225 Difference]: With dead ends: 144 [2024-11-28 04:51:14,109 INFO L226 Difference]: Without dead ends: 112 [2024-11-28 04:51:14,109 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:51:14,110 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 40 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:14,111 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 975 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:51:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-28 04:51:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2024-11-28 04:51:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.263157894736842) internal successors, (96), 79 states have internal predecessors, (96), 15 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (22), 14 states have call predecessors, (22), 14 states have call successors, (22) [2024-11-28 04:51:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2024-11-28 04:51:14,133 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 37 [2024-11-28 04:51:14,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:14,134 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2024-11-28 04:51:14,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:51:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2024-11-28 04:51:14,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 04:51:14,138 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:14,138 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-11-28 04:51:14,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 04:51:14,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:14,339 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:14,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:14,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1708255961, now seen corresponding path program 1 times [2024-11-28 04:51:14,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:14,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065769161] [2024-11-28 04:51:14,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:14,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:14,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:14,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:14,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:51:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:14,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:51:14,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:51:14,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:51:14,547 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:14,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065769161] [2024-11-28 04:51:14,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065769161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:14,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:14,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-28 04:51:14,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82581491] [2024-11-28 04:51:14,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:14,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:51:14,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:14,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:51:14,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:51:14,548 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:51:14,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:14,711 INFO L93 Difference]: Finished difference Result 204 states and 268 transitions. [2024-11-28 04:51:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:51:14,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-11-28 04:51:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:14,714 INFO L225 Difference]: With dead ends: 204 [2024-11-28 04:51:14,714 INFO L226 Difference]: Without dead ends: 159 [2024-11-28 04:51:14,714 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:51:14,715 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 36 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:14,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 644 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-28 04:51:14,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 138. [2024-11-28 04:51:14,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 103 states have (on average 1.2621359223300972) internal successors, (130), 106 states have internal predecessors, (130), 22 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2024-11-28 04:51:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 183 transitions. [2024-11-28 04:51:14,750 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 183 transitions. Word has length 37 [2024-11-28 04:51:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:14,753 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 183 transitions. [2024-11-28 04:51:14,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:51:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 183 transitions. [2024-11-28 04:51:14,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 04:51:14,758 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:14,759 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-11-28 04:51:14,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:14,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:14,963 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:14,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:14,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1765514263, now seen corresponding path program 1 times [2024-11-28 04:51:14,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:14,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145514150] [2024-11-28 04:51:14,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:14,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:14,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:14,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:14,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:51:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:15,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:51:15,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:51:15,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:15,549 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:15,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145514150] [2024-11-28 04:51:15,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145514150] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:15,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [887544730] [2024-11-28 04:51:15,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:15,550 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:51:15,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:51:15,554 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:51:15,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-28 04:51:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:15,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:51:15,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:51:15,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:15,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [887544730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:15,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:15,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2024-11-28 04:51:15,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43358771] [2024-11-28 04:51:15,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:15,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:51:15,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:15,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:51:15,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:51:15,839 INFO L87 Difference]: Start difference. First operand 138 states and 183 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:51:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:16,129 INFO L93 Difference]: Finished difference Result 169 states and 215 transitions. [2024-11-28 04:51:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:51:16,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-11-28 04:51:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:16,135 INFO L225 Difference]: With dead ends: 169 [2024-11-28 04:51:16,136 INFO L226 Difference]: Without dead ends: 167 [2024-11-28 04:51:16,136 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:51:16,137 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 38 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:16,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 921 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:51:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-28 04:51:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 146. [2024-11-28 04:51:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 112 states have internal predecessors, (136), 22 states have call successors, (22), 12 states have call predecessors, (22), 14 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2024-11-28 04:51:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 189 transitions. [2024-11-28 04:51:16,163 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 189 transitions. Word has length 37 [2024-11-28 04:51:16,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:16,163 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 189 transitions. [2024-11-28 04:51:16,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:51:16,164 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 189 transitions. [2024-11-28 04:51:16,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 04:51:16,165 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:16,165 INFO L218 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] [2024-11-28 04:51:16,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:16,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:16,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:16,568 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:16,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:16,569 INFO L85 PathProgramCache]: Analyzing trace with hash 452894749, now seen corresponding path program 1 times [2024-11-28 04:51:16,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:16,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005117469] [2024-11-28 04:51:16,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:16,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:16,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:16,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:16,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:51:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:16,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:51:16,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:51:16,764 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:16,764 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:16,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005117469] [2024-11-28 04:51:16,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005117469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:16,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:16,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:51:16,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149195084] [2024-11-28 04:51:16,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:16,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:51:16,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:16,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:51:16,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:51:16,765 INFO L87 Difference]: Start difference. First operand 146 states and 189 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:51:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:16,883 INFO L93 Difference]: Finished difference Result 162 states and 206 transitions. [2024-11-28 04:51:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:51:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2024-11-28 04:51:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:16,886 INFO L225 Difference]: With dead ends: 162 [2024-11-28 04:51:16,886 INFO L226 Difference]: Without dead ends: 160 [2024-11-28 04:51:16,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:51:16,887 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 3 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:16,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 289 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-28 04:51:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 152. [2024-11-28 04:51:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 113 states have (on average 1.247787610619469) internal successors, (141), 117 states have internal predecessors, (141), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (32), 21 states have call predecessors, (32), 22 states have call successors, (32) [2024-11-28 04:51:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 196 transitions. [2024-11-28 04:51:16,915 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 196 transitions. Word has length 37 [2024-11-28 04:51:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:16,916 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 196 transitions. [2024-11-28 04:51:16,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:51:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 196 transitions. [2024-11-28 04:51:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 04:51:16,917 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:16,918 INFO L218 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] [2024-11-28 04:51:16,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:51:17,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:17,122 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:17,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:17,123 INFO L85 PathProgramCache]: Analyzing trace with hash 510153051, now seen corresponding path program 1 times [2024-11-28 04:51:17,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:17,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431738496] [2024-11-28 04:51:17,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:17,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:17,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:17,128 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:17,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:51:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:17,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:51:17,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:51:17,305 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:17,305 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431738496] [2024-11-28 04:51:17,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431738496] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:17,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:17,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:51:17,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932009834] [2024-11-28 04:51:17,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:17,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:51:17,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:17,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:51:17,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:51:17,308 INFO L87 Difference]: Start difference. First operand 152 states and 196 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:51:17,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:17,420 INFO L93 Difference]: Finished difference Result 158 states and 201 transitions. [2024-11-28 04:51:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:51:17,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2024-11-28 04:51:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:17,428 INFO L225 Difference]: With dead ends: 158 [2024-11-28 04:51:17,429 INFO L226 Difference]: Without dead ends: 156 [2024-11-28 04:51:17,429 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:51:17,430 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 3 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:17,430 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 284 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-28 04:51:17,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2024-11-28 04:51:17,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 22 states have call successors, (22), 13 states have call predecessors, (22), 15 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2024-11-28 04:51:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 192 transitions. [2024-11-28 04:51:17,453 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 192 transitions. Word has length 37 [2024-11-28 04:51:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:17,454 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 192 transitions. [2024-11-28 04:51:17,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 04:51:17,454 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 192 transitions. [2024-11-28 04:51:17,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:51:17,455 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:17,455 INFO L218 NwaCegarLoop]: trace histogram [3, 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] [2024-11-28 04:51:17,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:17,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:17,656 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:17,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:17,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1332135740, now seen corresponding path program 1 times [2024-11-28 04:51:17,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:17,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648522429] [2024-11-28 04:51:17,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:17,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:17,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:17,658 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:17,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:51:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:17,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:51:17,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:51:17,803 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:51:17,911 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:17,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648522429] [2024-11-28 04:51:17,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648522429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:17,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:17,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-11-28 04:51:17,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425139779] [2024-11-28 04:51:17,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:17,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:51:17,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:17,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:51:17,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:51:17,912 INFO L87 Difference]: Start difference. First operand 150 states and 192 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:51:18,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:18,035 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2024-11-28 04:51:18,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:51:18,036 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-28 04:51:18,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:18,037 INFO L225 Difference]: With dead ends: 181 [2024-11-28 04:51:18,038 INFO L226 Difference]: Without dead ends: 170 [2024-11-28 04:51:18,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:51:18,039 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 29 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:18,039 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 406 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-28 04:51:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 158. [2024-11-28 04:51:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 121 states have internal predecessors, (145), 24 states have call successors, (24), 13 states have call predecessors, (24), 16 states have return successors, (35), 23 states have call predecessors, (35), 23 states have call successors, (35) [2024-11-28 04:51:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 204 transitions. [2024-11-28 04:51:18,073 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 204 transitions. Word has length 44 [2024-11-28 04:51:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:18,074 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 204 transitions. [2024-11-28 04:51:18,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:51:18,074 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 204 transitions. [2024-11-28 04:51:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:51:18,075 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:18,075 INFO L218 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] [2024-11-28 04:51:18,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:51:18,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:18,280 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:18,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:18,281 INFO L85 PathProgramCache]: Analyzing trace with hash -631071162, now seen corresponding path program 1 times [2024-11-28 04:51:18,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:18,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978039928] [2024-11-28 04:51:18,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:18,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:18,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:18,285 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:18,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:51:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:18,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:51:18,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:51:18,493 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:18,493 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:18,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978039928] [2024-11-28 04:51:18,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978039928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:18,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:18,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 04:51:18,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361739839] [2024-11-28 04:51:18,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:18,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:51:18,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:18,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:51:18,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:51:18,495 INFO L87 Difference]: Start difference. First operand 158 states and 204 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:51:18,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:18,780 INFO L93 Difference]: Finished difference Result 217 states and 283 transitions. [2024-11-28 04:51:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:51:18,781 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-28 04:51:18,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:18,783 INFO L225 Difference]: With dead ends: 217 [2024-11-28 04:51:18,783 INFO L226 Difference]: Without dead ends: 210 [2024-11-28 04:51:18,784 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:51:18,784 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 23 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:18,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 649 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:51:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-28 04:51:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 172. [2024-11-28 04:51:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 127 states have (on average 1.2283464566929134) internal successors, (156), 131 states have internal predecessors, (156), 27 states have call successors, (27), 13 states have call predecessors, (27), 17 states have return successors, (42), 27 states have call predecessors, (42), 26 states have call successors, (42) [2024-11-28 04:51:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 225 transitions. [2024-11-28 04:51:18,808 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 225 transitions. Word has length 44 [2024-11-28 04:51:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:18,809 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 225 transitions. [2024-11-28 04:51:18,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:51:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 225 transitions. [2024-11-28 04:51:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:51:18,810 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:18,810 INFO L218 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] [2024-11-28 04:51:18,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:51:19,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:19,015 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:19,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1200006230, now seen corresponding path program 1 times [2024-11-28 04:51:19,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:19,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046143356] [2024-11-28 04:51:19,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:19,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:19,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:19,017 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:19,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:51:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:19,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:51:19,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:51:19,122 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:19,122 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:19,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046143356] [2024-11-28 04:51:19,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046143356] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:19,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:19,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:51:19,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538800233] [2024-11-28 04:51:19,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:19,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:51:19,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:19,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:51:19,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:51:19,124 INFO L87 Difference]: Start difference. First operand 172 states and 225 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2024-11-28 04:51:19,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:19,181 INFO L93 Difference]: Finished difference Result 180 states and 232 transitions. [2024-11-28 04:51:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:51:19,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 46 [2024-11-28 04:51:19,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:19,183 INFO L225 Difference]: With dead ends: 180 [2024-11-28 04:51:19,183 INFO L226 Difference]: Without dead ends: 172 [2024-11-28 04:51:19,184 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:51:19,184 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:19,185 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 312 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:51:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-28 04:51:19,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2024-11-28 04:51:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 127 states have (on average 1.220472440944882) internal successors, (155), 131 states have internal predecessors, (155), 27 states have call successors, (27), 13 states have call predecessors, (27), 17 states have return successors, (42), 27 states have call predecessors, (42), 26 states have call successors, (42) [2024-11-28 04:51:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 224 transitions. [2024-11-28 04:51:19,206 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 224 transitions. Word has length 46 [2024-11-28 04:51:19,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:19,206 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 224 transitions. [2024-11-28 04:51:19,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2024-11-28 04:51:19,207 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 224 transitions. [2024-11-28 04:51:19,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:51:19,208 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:19,208 INFO L218 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] [2024-11-28 04:51:19,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 04:51:19,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:19,410 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:19,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:19,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1257264532, now seen corresponding path program 1 times [2024-11-28 04:51:19,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:19,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574362524] [2024-11-28 04:51:19,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:19,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:19,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:19,414 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:19,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:51:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:19,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:51:19,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:51:19,604 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:51:19,797 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:19,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574362524] [2024-11-28 04:51:19,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574362524] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:19,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:19,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2024-11-28 04:51:19,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777016975] [2024-11-28 04:51:19,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:19,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:51:19,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:19,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:51:19,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:51:19,800 INFO L87 Difference]: Start difference. First operand 172 states and 224 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:51:20,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:20,129 INFO L93 Difference]: Finished difference Result 224 states and 288 transitions. [2024-11-28 04:51:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:51:20,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2024-11-28 04:51:20,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:20,132 INFO L225 Difference]: With dead ends: 224 [2024-11-28 04:51:20,132 INFO L226 Difference]: Without dead ends: 213 [2024-11-28 04:51:20,132 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:51:20,133 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 21 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:20,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 682 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:51:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-28 04:51:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 180. [2024-11-28 04:51:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 133 states have (on average 1.2105263157894737) internal successors, (161), 137 states have internal predecessors, (161), 28 states have call successors, (28), 13 states have call predecessors, (28), 18 states have return successors, (43), 29 states have call predecessors, (43), 26 states have call successors, (43) [2024-11-28 04:51:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 232 transitions. [2024-11-28 04:51:20,156 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 232 transitions. Word has length 46 [2024-11-28 04:51:20,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:20,157 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 232 transitions. [2024-11-28 04:51:20,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:51:20,157 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 232 transitions. [2024-11-28 04:51:20,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:51:20,159 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:20,159 INFO L218 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] [2024-11-28 04:51:20,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:51:20,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:20,363 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:20,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:20,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2076958974, now seen corresponding path program 1 times [2024-11-28 04:51:20,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:20,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260046119] [2024-11-28 04:51:20,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:20,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:20,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:20,365 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:20,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:51:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:20,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:51:20,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:51:20,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:51:20,798 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:20,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260046119] [2024-11-28 04:51:20,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260046119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:20,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:20,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2024-11-28 04:51:20,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336232335] [2024-11-28 04:51:20,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:20,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:51:20,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:20,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:51:20,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:51:20,800 INFO L87 Difference]: Start difference. First operand 180 states and 232 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:51:21,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:21,504 INFO L93 Difference]: Finished difference Result 256 states and 340 transitions. [2024-11-28 04:51:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:51:21,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-11-28 04:51:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:21,507 INFO L225 Difference]: With dead ends: 256 [2024-11-28 04:51:21,507 INFO L226 Difference]: Without dead ends: 249 [2024-11-28 04:51:21,508 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:51:21,508 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 45 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:21,509 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 926 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:51:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-28 04:51:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 190. [2024-11-28 04:51:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 139 states have (on average 1.2014388489208634) internal successors, (167), 145 states have internal predecessors, (167), 30 states have call successors, (30), 13 states have call predecessors, (30), 20 states have return successors, (49), 31 states have call predecessors, (49), 28 states have call successors, (49) [2024-11-28 04:51:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 246 transitions. [2024-11-28 04:51:21,545 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 246 transitions. Word has length 47 [2024-11-28 04:51:21,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:21,545 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 246 transitions. [2024-11-28 04:51:21,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:51:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 246 transitions. [2024-11-28 04:51:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:51:21,548 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:21,548 INFO L218 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] [2024-11-28 04:51:21,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:51:21,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:21,749 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:21,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:21,750 INFO L85 PathProgramCache]: Analyzing trace with hash 32387902, now seen corresponding path program 1 times [2024-11-28 04:51:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:21,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850228135] [2024-11-28 04:51:21,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:21,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:21,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:21,753 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:21,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:51:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:21,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:51:21,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:51:21,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:51:22,506 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:22,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850228135] [2024-11-28 04:51:22,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850228135] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:22,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:22,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-28 04:51:22,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785097162] [2024-11-28 04:51:22,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:22,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:51:22,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:22,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:51:22,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:51:22,508 INFO L87 Difference]: Start difference. First operand 190 states and 246 transitions. Second operand has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 04:51:23,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:23,926 INFO L93 Difference]: Finished difference Result 270 states and 370 transitions. [2024-11-28 04:51:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 04:51:23,927 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2024-11-28 04:51:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:23,929 INFO L225 Difference]: With dead ends: 270 [2024-11-28 04:51:23,929 INFO L226 Difference]: Without dead ends: 255 [2024-11-28 04:51:23,931 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:51:23,931 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 60 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:23,932 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1080 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:51:23,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-28 04:51:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 196. [2024-11-28 04:51:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 143 states have (on average 1.2027972027972027) internal successors, (172), 152 states have internal predecessors, (172), 30 states have call successors, (30), 13 states have call predecessors, (30), 22 states have return successors, (58), 30 states have call predecessors, (58), 28 states have call successors, (58) [2024-11-28 04:51:23,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 260 transitions. [2024-11-28 04:51:23,964 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 260 transitions. Word has length 47 [2024-11-28 04:51:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:23,965 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 260 transitions. [2024-11-28 04:51:23,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 04:51:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 260 transitions. [2024-11-28 04:51:23,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:51:23,967 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:23,967 INFO L218 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] [2024-11-28 04:51:23,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:24,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:24,171 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:24,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1383586494, now seen corresponding path program 2 times [2024-11-28 04:51:24,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:24,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116771372] [2024-11-28 04:51:24,172 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:51:24,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:24,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:24,177 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:24,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:51:24,237 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:51:24,238 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:24,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:51:24,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:51:24,372 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:51:24,571 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:24,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116771372] [2024-11-28 04:51:24,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116771372] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:24,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:24,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2024-11-28 04:51:24,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470287026] [2024-11-28 04:51:24,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:24,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:51:24,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:24,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:51:24,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:51:24,573 INFO L87 Difference]: Start difference. First operand 196 states and 260 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:51:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:25,116 INFO L93 Difference]: Finished difference Result 254 states and 354 transitions. [2024-11-28 04:51:25,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:51:25,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-11-28 04:51:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:25,119 INFO L225 Difference]: With dead ends: 254 [2024-11-28 04:51:25,119 INFO L226 Difference]: Without dead ends: 247 [2024-11-28 04:51:25,121 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:51:25,122 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 59 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:25,123 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 852 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:51:25,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-28 04:51:25,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 198. [2024-11-28 04:51:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 153 states have internal predecessors, (173), 31 states have call successors, (31), 13 states have call predecessors, (31), 22 states have return successors, (59), 31 states have call predecessors, (59), 29 states have call successors, (59) [2024-11-28 04:51:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 263 transitions. [2024-11-28 04:51:25,157 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 263 transitions. Word has length 47 [2024-11-28 04:51:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:25,157 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 263 transitions. [2024-11-28 04:51:25,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:51:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 263 transitions. [2024-11-28 04:51:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:51:25,159 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:25,159 INFO L218 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] [2024-11-28 04:51:25,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 04:51:25,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:25,360 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:25,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:25,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1347801875, now seen corresponding path program 1 times [2024-11-28 04:51:25,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:25,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150922838] [2024-11-28 04:51:25,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:25,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:25,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:25,363 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:25,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:51:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:25,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 04:51:25,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:51:25,711 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:25,711 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:25,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150922838] [2024-11-28 04:51:25,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150922838] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:25,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:25,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-28 04:51:25,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814411703] [2024-11-28 04:51:25,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:25,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:51:25,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:25,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:51:25,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:51:25,712 INFO L87 Difference]: Start difference. First operand 198 states and 263 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:51:26,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:26,081 INFO L93 Difference]: Finished difference Result 297 states and 403 transitions. [2024-11-28 04:51:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:51:26,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2024-11-28 04:51:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:26,084 INFO L225 Difference]: With dead ends: 297 [2024-11-28 04:51:26,084 INFO L226 Difference]: Without dead ends: 238 [2024-11-28 04:51:26,085 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:51:26,086 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 37 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:26,086 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 721 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:51:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-28 04:51:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 217. [2024-11-28 04:51:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 158 states have (on average 1.1772151898734178) internal successors, (186), 167 states have internal predecessors, (186), 35 states have call successors, (35), 14 states have call predecessors, (35), 23 states have return successors, (63), 35 states have call predecessors, (63), 33 states have call successors, (63) [2024-11-28 04:51:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 284 transitions. [2024-11-28 04:51:26,122 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 284 transitions. Word has length 47 [2024-11-28 04:51:26,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:26,123 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 284 transitions. [2024-11-28 04:51:26,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:51:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 284 transitions. [2024-11-28 04:51:26,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:51:26,125 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:26,125 INFO L218 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] [2024-11-28 04:51:26,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:51:26,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:26,326 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:26,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:26,326 INFO L85 PathProgramCache]: Analyzing trace with hash 92440663, now seen corresponding path program 1 times [2024-11-28 04:51:26,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:26,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474171897] [2024-11-28 04:51:26,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:26,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:26,329 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:26,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:51:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:26,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:51:26,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:51:26,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:27,002 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:27,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474171897] [2024-11-28 04:51:27,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474171897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:27,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1160049408] [2024-11-28 04:51:27,003 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:27,003 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:51:27,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:51:27,005 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:51:27,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-28 04:51:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:27,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:51:27,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:51:27,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:27,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1160049408] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:27,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:27,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2024-11-28 04:51:27,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954920958] [2024-11-28 04:51:27,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:27,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:51:27,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:27,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:51:27,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:51:27,481 INFO L87 Difference]: Start difference. First operand 217 states and 284 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:51:27,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:27,985 INFO L93 Difference]: Finished difference Result 289 states and 374 transitions. [2024-11-28 04:51:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:51:27,985 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 47 [2024-11-28 04:51:27,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:27,987 INFO L225 Difference]: With dead ends: 289 [2024-11-28 04:51:27,987 INFO L226 Difference]: Without dead ends: 237 [2024-11-28 04:51:27,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:51:27,988 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 38 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:27,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 895 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:51:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-28 04:51:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 223. [2024-11-28 04:51:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 163 states have (on average 1.165644171779141) internal successors, (190), 172 states have internal predecessors, (190), 35 states have call successors, (35), 15 states have call predecessors, (35), 24 states have return successors, (63), 35 states have call predecessors, (63), 33 states have call successors, (63) [2024-11-28 04:51:28,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 288 transitions. [2024-11-28 04:51:28,030 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 288 transitions. Word has length 47 [2024-11-28 04:51:28,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:28,030 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 288 transitions. [2024-11-28 04:51:28,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:51:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 288 transitions. [2024-11-28 04:51:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:51:28,032 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:28,032 INFO L218 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] [2024-11-28 04:51:28,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2024-11-28 04:51:28,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:28,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:28,433 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:28,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:28,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1077556478, now seen corresponding path program 2 times [2024-11-28 04:51:28,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:28,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730740564] [2024-11-28 04:51:28,433 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:51:28,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:28,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:28,435 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:28,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:51:28,499 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:51:28,499 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:28,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:51:28,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:51:28,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:51:29,085 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:29,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730740564] [2024-11-28 04:51:29,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730740564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:29,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:29,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-28 04:51:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938772251] [2024-11-28 04:51:29,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:29,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:51:29,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:29,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:51:29,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:51:29,087 INFO L87 Difference]: Start difference. First operand 223 states and 288 transitions. Second operand has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 04:51:30,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:30,330 INFO L93 Difference]: Finished difference Result 287 states and 384 transitions. [2024-11-28 04:51:30,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:51:30,331 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2024-11-28 04:51:30,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:30,333 INFO L225 Difference]: With dead ends: 287 [2024-11-28 04:51:30,333 INFO L226 Difference]: Without dead ends: 274 [2024-11-28 04:51:30,334 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 04:51:30,334 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 50 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:30,335 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1268 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:51:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-28 04:51:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 233. [2024-11-28 04:51:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 169 states have (on average 1.1597633136094674) internal successors, (196), 180 states have internal predecessors, (196), 37 states have call successors, (37), 15 states have call predecessors, (37), 26 states have return successors, (71), 37 states have call predecessors, (71), 35 states have call successors, (71) [2024-11-28 04:51:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 304 transitions. [2024-11-28 04:51:30,376 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 304 transitions. Word has length 47 [2024-11-28 04:51:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:30,376 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 304 transitions. [2024-11-28 04:51:30,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 04:51:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 304 transitions. [2024-11-28 04:51:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:51:30,378 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:30,378 INFO L218 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] [2024-11-28 04:51:30,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 04:51:30,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:30,582 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:30,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash -92272743, now seen corresponding path program 1 times [2024-11-28 04:51:30,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:30,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449671034] [2024-11-28 04:51:30,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:30,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:30,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:30,587 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:30,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 04:51:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:30,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 04:51:30,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:51:30,925 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:30,925 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:30,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449671034] [2024-11-28 04:51:30,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449671034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:30,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:30,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-28 04:51:30,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584954529] [2024-11-28 04:51:30,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:30,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:51:30,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:30,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:51:30,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:51:30,927 INFO L87 Difference]: Start difference. First operand 233 states and 304 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:51:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:31,433 INFO L93 Difference]: Finished difference Result 300 states and 393 transitions. [2024-11-28 04:51:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:51:31,434 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-11-28 04:51:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:31,436 INFO L225 Difference]: With dead ends: 300 [2024-11-28 04:51:31,436 INFO L226 Difference]: Without dead ends: 248 [2024-11-28 04:51:31,437 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:51:31,437 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 40 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:31,438 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 911 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:51:31,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-28 04:51:31,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 233. [2024-11-28 04:51:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 169 states have (on average 1.1538461538461537) internal successors, (195), 180 states have internal predecessors, (195), 37 states have call successors, (37), 15 states have call predecessors, (37), 26 states have return successors, (71), 37 states have call predecessors, (71), 35 states have call successors, (71) [2024-11-28 04:51:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 303 transitions. [2024-11-28 04:51:31,478 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 303 transitions. Word has length 47 [2024-11-28 04:51:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:31,479 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 303 transitions. [2024-11-28 04:51:31,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:51:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 303 transitions. [2024-11-28 04:51:31,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:51:31,482 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:31,482 INFO L218 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] [2024-11-28 04:51:31,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:31,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:31,683 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:31,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:31,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1347633955, now seen corresponding path program 1 times [2024-11-28 04:51:31,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:31,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605668742] [2024-11-28 04:51:31,684 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:31,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:31,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:31,687 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:31,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 04:51:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:31,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:51:31,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:51:32,032 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:32,250 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:32,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605668742] [2024-11-28 04:51:32,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605668742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:32,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1872651378] [2024-11-28 04:51:32,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:32,251 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:51:32,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:51:32,253 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:51:32,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2024-11-28 04:51:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:32,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:51:32,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:51:32,462 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:32,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1872651378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:32,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:51:32,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-28 04:51:32,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042325566] [2024-11-28 04:51:32,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:32,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:51:32,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:32,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:51:32,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:51:32,463 INFO L87 Difference]: Start difference. First operand 233 states and 303 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:51:32,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:32,666 INFO L93 Difference]: Finished difference Result 256 states and 337 transitions. [2024-11-28 04:51:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:51:32,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-11-28 04:51:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:32,670 INFO L225 Difference]: With dead ends: 256 [2024-11-28 04:51:32,670 INFO L226 Difference]: Without dead ends: 254 [2024-11-28 04:51:32,671 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:51:32,671 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:32,672 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 241 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-28 04:51:32,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 238. [2024-11-28 04:51:32,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 172 states have (on average 1.1511627906976745) internal successors, (198), 184 states have internal predecessors, (198), 38 states have call successors, (38), 16 states have call predecessors, (38), 27 states have return successors, (72), 37 states have call predecessors, (72), 36 states have call successors, (72) [2024-11-28 04:51:32,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 308 transitions. [2024-11-28 04:51:32,723 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 308 transitions. Word has length 47 [2024-11-28 04:51:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:32,723 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 308 transitions. [2024-11-28 04:51:32,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:51:32,724 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 308 transitions. [2024-11-28 04:51:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 04:51:32,725 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:32,725 INFO L218 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] [2024-11-28 04:51:32,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 04:51:32,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2024-11-28 04:51:33,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:51:33,129 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:33,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:33,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1398876639, now seen corresponding path program 1 times [2024-11-28 04:51:33,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:33,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314632695] [2024-11-28 04:51:33,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:33,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:33,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:33,136 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:33,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 04:51:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:33,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:51:33,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:51:33,277 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:51:33,402 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:33,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314632695] [2024-11-28 04:51:33,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314632695] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:33,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-28 04:51:33,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743797008] [2024-11-28 04:51:33,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:33,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:51:33,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:33,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:51:33,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:51:33,403 INFO L87 Difference]: Start difference. First operand 238 states and 308 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 11 states have internal predecessors, (39), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:51:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:33,627 INFO L93 Difference]: Finished difference Result 317 states and 405 transitions. [2024-11-28 04:51:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:51:33,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 11 states have internal predecessors, (39), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2024-11-28 04:51:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:33,630 INFO L225 Difference]: With dead ends: 317 [2024-11-28 04:51:33,630 INFO L226 Difference]: Without dead ends: 238 [2024-11-28 04:51:33,631 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:51:33,631 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 48 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:33,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 880 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:33,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-28 04:51:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 226. [2024-11-28 04:51:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 165 states have (on average 1.1454545454545455) internal successors, (189), 175 states have internal predecessors, (189), 35 states have call successors, (35), 16 states have call predecessors, (35), 25 states have return successors, (67), 34 states have call predecessors, (67), 33 states have call successors, (67) [2024-11-28 04:51:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 291 transitions. [2024-11-28 04:51:33,689 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 291 transitions. Word has length 48 [2024-11-28 04:51:33,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:33,689 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 291 transitions. [2024-11-28 04:51:33,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 11 states have internal predecessors, (39), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:51:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 291 transitions. [2024-11-28 04:51:33,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 04:51:33,691 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:33,691 INFO L218 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] [2024-11-28 04:51:33,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 04:51:33,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:33,895 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:33,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:33,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1203450459, now seen corresponding path program 1 times [2024-11-28 04:51:33,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:33,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274737770] [2024-11-28 04:51:33,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:33,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:33,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:33,898 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:33,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 04:51:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:33,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:51:33,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:51:34,025 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:34,026 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:34,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274737770] [2024-11-28 04:51:34,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274737770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:34,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:34,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 04:51:34,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119997426] [2024-11-28 04:51:34,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:34,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:51:34,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:34,027 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:51:34,027 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:51:34,027 INFO L87 Difference]: Start difference. First operand 226 states and 291 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:51:34,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:34,267 INFO L93 Difference]: Finished difference Result 292 states and 373 transitions. [2024-11-28 04:51:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:51:34,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-11-28 04:51:34,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:34,269 INFO L225 Difference]: With dead ends: 292 [2024-11-28 04:51:34,269 INFO L226 Difference]: Without dead ends: 235 [2024-11-28 04:51:34,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:51:34,272 INFO L435 NwaCegarLoop]: 89 mSDtfsCounter, 32 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:34,272 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 735 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-28 04:51:34,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 221. [2024-11-28 04:51:34,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 162 states have (on average 1.1419753086419753) internal successors, (185), 171 states have internal predecessors, (185), 34 states have call successors, (34), 16 states have call predecessors, (34), 24 states have return successors, (65), 33 states have call predecessors, (65), 32 states have call successors, (65) [2024-11-28 04:51:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 284 transitions. [2024-11-28 04:51:34,308 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 284 transitions. Word has length 48 [2024-11-28 04:51:34,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:34,308 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 284 transitions. [2024-11-28 04:51:34,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:51:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 284 transitions. [2024-11-28 04:51:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 04:51:34,310 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:34,310 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:34,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 04:51:34,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:34,511 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:34,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:34,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1966680572, now seen corresponding path program 1 times [2024-11-28 04:51:34,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:34,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804302505] [2024-11-28 04:51:34,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:34,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:34,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:34,515 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:34,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 04:51:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:34,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:51:34,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:51:34,646 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:34,647 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:34,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804302505] [2024-11-28 04:51:34,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804302505] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:34,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:51:34,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 04:51:34,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142413532] [2024-11-28 04:51:34,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:34,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:51:34,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:34,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:51:34,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:51:34,648 INFO L87 Difference]: Start difference. First operand 221 states and 284 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:51:34,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:34,782 INFO L93 Difference]: Finished difference Result 290 states and 364 transitions. [2024-11-28 04:51:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 04:51:34,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2024-11-28 04:51:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:34,785 INFO L225 Difference]: With dead ends: 290 [2024-11-28 04:51:34,785 INFO L226 Difference]: Without dead ends: 234 [2024-11-28 04:51:34,785 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:51:34,786 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 11 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 477 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 [2024-11-28 04:51:34,786 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 477 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:51:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-28 04:51:34,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 219. [2024-11-28 04:51:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 170 states have internal predecessors, (184), 33 states have call successors, (33), 16 states have call predecessors, (33), 24 states have return successors, (63), 32 states have call predecessors, (63), 31 states have call successors, (63) [2024-11-28 04:51:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 280 transitions. [2024-11-28 04:51:34,821 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 280 transitions. Word has length 50 [2024-11-28 04:51:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:34,821 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 280 transitions. [2024-11-28 04:51:34,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:51:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 280 transitions. [2024-11-28 04:51:34,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 04:51:34,823 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:34,823 INFO L218 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] [2024-11-28 04:51:34,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 04:51:35,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:35,023 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:35,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:35,024 INFO L85 PathProgramCache]: Analyzing trace with hash 941958551, now seen corresponding path program 1 times [2024-11-28 04:51:35,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:35,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109870479] [2024-11-28 04:51:35,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:35,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:35,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:35,026 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:35,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 04:51:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:35,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:51:35,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:51:46,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:46,471 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:46,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109870479] [2024-11-28 04:51:46,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109870479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:46,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1649101302] [2024-11-28 04:51:46,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:46,472 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:51:46,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:51:46,474 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:51:46,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-28 04:51:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:46,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:51:46,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:51:46,766 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:51:46,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1649101302] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:51:46,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:51:46,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-28 04:51:46,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048752515] [2024-11-28 04:51:46,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:46,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:51:46,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:46,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:51:46,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=161, Unknown=3, NotChecked=0, Total=210 [2024-11-28 04:51:46,768 INFO L87 Difference]: Start difference. First operand 219 states and 280 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:51:50,785 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] [2024-11-28 04:51:54,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:51:58,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:52:02,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:52:06,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:52:10,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:52:15,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:52:19,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:52:23,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:52:24,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:24,038 INFO L93 Difference]: Finished difference Result 241 states and 311 transitions. [2024-11-28 04:52:24,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:52:24,039 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-11-28 04:52:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:24,041 INFO L225 Difference]: With dead ends: 241 [2024-11-28 04:52:24,041 INFO L226 Difference]: Without dead ends: 217 [2024-11-28 04:52:24,041 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=53, Invalid=184, Unknown=3, NotChecked=0, Total=240 [2024-11-28 04:52:24,042 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 8 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:24,042 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 294 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 9 Unknown, 0 Unchecked, 37.2s Time] [2024-11-28 04:52:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-28 04:52:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 201. [2024-11-28 04:52:24,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 149 states have (on average 1.1409395973154361) internal successors, (170), 157 states have internal predecessors, (170), 29 states have call successors, (29), 15 states have call predecessors, (29), 22 states have return successors, (58), 28 states have call predecessors, (58), 28 states have call successors, (58) [2024-11-28 04:52:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 257 transitions. [2024-11-28 04:52:24,081 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 257 transitions. Word has length 48 [2024-11-28 04:52:24,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:24,081 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 257 transitions. [2024-11-28 04:52:24,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:52:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 257 transitions. [2024-11-28 04:52:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 04:52:24,084 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:24,084 INFO L218 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] [2024-11-28 04:52:24,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 04:52:24,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2024-11-28 04:52:24,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:52:24,485 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:24,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:24,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1506653670, now seen corresponding path program 1 times [2024-11-28 04:52:24,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:24,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155708187] [2024-11-28 04:52:24,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:24,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:24,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:24,488 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:24,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 04:52:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:24,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:52:24,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:52:24,744 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 04:52:25,068 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:25,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155708187] [2024-11-28 04:52:25,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155708187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:25,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:25,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-28 04:52:25,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497341879] [2024-11-28 04:52:25,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:25,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:52:25,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:25,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:52:25,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:52:25,070 INFO L87 Difference]: Start difference. First operand 201 states and 257 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-28 04:52:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:25,378 INFO L93 Difference]: Finished difference Result 229 states and 300 transitions. [2024-11-28 04:52:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:52:25,380 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 49 [2024-11-28 04:52:25,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:25,381 INFO L225 Difference]: With dead ends: 229 [2024-11-28 04:52:25,382 INFO L226 Difference]: Without dead ends: 216 [2024-11-28 04:52:25,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:52:25,383 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 8 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:25,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 517 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:52:25,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-28 04:52:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2024-11-28 04:52:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 153 states have (on average 1.1372549019607843) internal successors, (174), 162 states have internal predecessors, (174), 31 states have call successors, (31), 15 states have call predecessors, (31), 23 states have return successors, (70), 30 states have call predecessors, (70), 30 states have call successors, (70) [2024-11-28 04:52:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2024-11-28 04:52:25,425 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 49 [2024-11-28 04:52:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:25,425 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2024-11-28 04:52:25,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-28 04:52:25,425 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2024-11-28 04:52:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 04:52:25,427 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:25,427 INFO L218 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] [2024-11-28 04:52:25,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 04:52:25,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:25,631 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:25,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:25,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1419729622, now seen corresponding path program 1 times [2024-11-28 04:52:25,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:25,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484887724] [2024-11-28 04:52:25,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:25,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:25,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:25,633 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:25,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 04:52:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:25,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:52:25,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:52:25,939 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:52:26,560 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:26,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484887724] [2024-11-28 04:52:26,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484887724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:26,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:26,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-28 04:52:26,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536876962] [2024-11-28 04:52:26,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:26,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:52:26,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:26,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:52:26,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:52:26,562 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 04:52:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:27,257 INFO L93 Difference]: Finished difference Result 243 states and 332 transitions. [2024-11-28 04:52:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:52:27,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2024-11-28 04:52:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:27,260 INFO L225 Difference]: With dead ends: 243 [2024-11-28 04:52:27,260 INFO L226 Difference]: Without dead ends: 218 [2024-11-28 04:52:27,260 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:52:27,261 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:27,261 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 564 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:52:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-28 04:52:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 190. [2024-11-28 04:52:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 140 states have (on average 1.15) internal successors, (161), 149 states have internal predecessors, (161), 28 states have call successors, (28), 13 states have call predecessors, (28), 21 states have return successors, (62), 27 states have call predecessors, (62), 27 states have call successors, (62) [2024-11-28 04:52:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 251 transitions. [2024-11-28 04:52:27,303 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 251 transitions. Word has length 49 [2024-11-28 04:52:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:27,303 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 251 transitions. [2024-11-28 04:52:27,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 04:52:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 251 transitions. [2024-11-28 04:52:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 04:52:27,305 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:27,305 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 04:52:27,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 04:52:27,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:27,506 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:27,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:27,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1831404456, now seen corresponding path program 1 times [2024-11-28 04:52:27,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:27,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422289452] [2024-11-28 04:52:27,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:27,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:27,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:27,509 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:27,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 04:52:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:27,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:52:27,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:52:27,801 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:27,801 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:27,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422289452] [2024-11-28 04:52:27,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422289452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:27,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:27,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 04:52:27,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540438444] [2024-11-28 04:52:27,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:27,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:52:27,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:27,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:52:27,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:52:27,804 INFO L87 Difference]: Start difference. First operand 190 states and 251 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:52:28,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:28,141 INFO L93 Difference]: Finished difference Result 228 states and 319 transitions. [2024-11-28 04:52:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:52:28,142 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2024-11-28 04:52:28,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:28,144 INFO L225 Difference]: With dead ends: 228 [2024-11-28 04:52:28,144 INFO L226 Difference]: Without dead ends: 219 [2024-11-28 04:52:28,144 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:52:28,145 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 17 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:28,145 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 477 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:52:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-28 04:52:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 193. [2024-11-28 04:52:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 142 states have (on average 1.147887323943662) internal successors, (163), 152 states have internal predecessors, (163), 28 states have call successors, (28), 13 states have call predecessors, (28), 22 states have return successors, (67), 27 states have call predecessors, (67), 27 states have call successors, (67) [2024-11-28 04:52:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 258 transitions. [2024-11-28 04:52:28,189 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 258 transitions. Word has length 52 [2024-11-28 04:52:28,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:28,189 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 258 transitions. [2024-11-28 04:52:28,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:52:28,190 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 258 transitions. [2024-11-28 04:52:28,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 04:52:28,191 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:28,191 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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] [2024-11-28 04:52:28,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 04:52:28,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:28,392 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:28,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:28,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1689188580, now seen corresponding path program 1 times [2024-11-28 04:52:28,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:28,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652739565] [2024-11-28 04:52:28,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:28,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:28,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:28,395 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:28,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 04:52:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:28,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:52:28,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:52:28,642 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:52:28,938 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:28,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652739565] [2024-11-28 04:52:28,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652739565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:28,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:28,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-28 04:52:28,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396671075] [2024-11-28 04:52:28,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:28,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:52:28,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:28,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:52:28,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:52:28,939 INFO L87 Difference]: Start difference. First operand 193 states and 258 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:52:29,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:29,315 INFO L93 Difference]: Finished difference Result 230 states and 326 transitions. [2024-11-28 04:52:29,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:52:29,316 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2024-11-28 04:52:29,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:29,317 INFO L225 Difference]: With dead ends: 230 [2024-11-28 04:52:29,317 INFO L226 Difference]: Without dead ends: 212 [2024-11-28 04:52:29,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:52:29,319 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 57 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:29,319 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 343 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:52:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-28 04:52:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 193. [2024-11-28 04:52:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 142 states have (on average 1.1408450704225352) internal successors, (162), 152 states have internal predecessors, (162), 28 states have call successors, (28), 13 states have call predecessors, (28), 22 states have return successors, (66), 27 states have call predecessors, (66), 27 states have call successors, (66) [2024-11-28 04:52:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 256 transitions. [2024-11-28 04:52:29,365 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 256 transitions. Word has length 52 [2024-11-28 04:52:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:29,365 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 256 transitions. [2024-11-28 04:52:29,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:52:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 256 transitions. [2024-11-28 04:52:29,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-28 04:52:29,367 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:29,367 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 04:52:29,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 04:52:29,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:29,568 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:29,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:29,568 INFO L85 PathProgramCache]: Analyzing trace with hash 175706263, now seen corresponding path program 1 times [2024-11-28 04:52:29,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:29,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844470331] [2024-11-28 04:52:29,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:29,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:29,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:29,570 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:29,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 04:52:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:29,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:52:29,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:52:30,013 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:52:30,708 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:30,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844470331] [2024-11-28 04:52:30,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844470331] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:30,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:30,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-28 04:52:30,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893119963] [2024-11-28 04:52:30,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:30,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:52:30,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:30,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:52:30,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:52:30,710 INFO L87 Difference]: Start difference. First operand 193 states and 256 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-28 04:52:31,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:31,255 INFO L93 Difference]: Finished difference Result 235 states and 327 transitions. [2024-11-28 04:52:31,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:52:31,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 61 [2024-11-28 04:52:31,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:31,257 INFO L225 Difference]: With dead ends: 235 [2024-11-28 04:52:31,257 INFO L226 Difference]: Without dead ends: 226 [2024-11-28 04:52:31,258 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:52:31,263 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 27 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:31,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 847 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:52:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-28 04:52:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 209. [2024-11-28 04:52:31,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 152 states have (on average 1.144736842105263) internal successors, (174), 166 states have internal predecessors, (174), 31 states have call successors, (31), 13 states have call predecessors, (31), 25 states have return successors, (89), 29 states have call predecessors, (89), 30 states have call successors, (89) [2024-11-28 04:52:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 294 transitions. [2024-11-28 04:52:31,307 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 294 transitions. Word has length 61 [2024-11-28 04:52:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:31,308 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 294 transitions. [2024-11-28 04:52:31,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-28 04:52:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 294 transitions. [2024-11-28 04:52:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-28 04:52:31,309 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:31,310 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2024-11-28 04:52:31,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 04:52:31,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:31,515 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:31,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:31,515 INFO L85 PathProgramCache]: Analyzing trace with hash -54182894, now seen corresponding path program 1 times [2024-11-28 04:52:31,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:31,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163530099] [2024-11-28 04:52:31,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:31,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:31,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:31,518 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:31,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 04:52:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:31,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:52:31,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:52:31,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:52:32,338 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163530099] [2024-11-28 04:52:32,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163530099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:32,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:32,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-28 04:52:32,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545974320] [2024-11-28 04:52:32,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:32,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:52:32,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:32,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:52:32,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:52:32,340 INFO L87 Difference]: Start difference. First operand 209 states and 294 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:52:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:32,954 INFO L93 Difference]: Finished difference Result 227 states and 317 transitions. [2024-11-28 04:52:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:52:32,954 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 61 [2024-11-28 04:52:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:32,956 INFO L225 Difference]: With dead ends: 227 [2024-11-28 04:52:32,956 INFO L226 Difference]: Without dead ends: 209 [2024-11-28 04:52:32,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:52:32,959 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 19 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:32,959 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 529 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:52:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-28 04:52:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 193. [2024-11-28 04:52:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 152 states have internal predecessors, (161), 28 states have call successors, (28), 13 states have call predecessors, (28), 22 states have return successors, (65), 27 states have call predecessors, (65), 27 states have call successors, (65) [2024-11-28 04:52:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 254 transitions. [2024-11-28 04:52:33,003 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 254 transitions. Word has length 61 [2024-11-28 04:52:33,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:33,005 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 254 transitions. [2024-11-28 04:52:33,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:52:33,005 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 254 transitions. [2024-11-28 04:52:33,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-28 04:52:33,007 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:33,007 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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] [2024-11-28 04:52:33,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:33,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:33,208 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:33,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:33,208 INFO L85 PathProgramCache]: Analyzing trace with hash -255343283, now seen corresponding path program 1 times [2024-11-28 04:52:33,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:33,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147114470] [2024-11-28 04:52:33,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:33,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:33,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:33,211 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:33,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 04:52:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:33,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 04:52:33,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:52:33,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:52:34,614 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:34,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147114470] [2024-11-28 04:52:34,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147114470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:34,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:34,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-28 04:52:34,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324025105] [2024-11-28 04:52:34,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:34,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:52:34,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:34,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:52:34,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:52:34,616 INFO L87 Difference]: Start difference. First operand 193 states and 254 transitions. Second operand has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:52:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:36,820 INFO L93 Difference]: Finished difference Result 230 states and 312 transitions. [2024-11-28 04:52:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:52:36,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2024-11-28 04:52:36,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:36,823 INFO L225 Difference]: With dead ends: 230 [2024-11-28 04:52:36,823 INFO L226 Difference]: Without dead ends: 221 [2024-11-28 04:52:36,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 04:52:36,824 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 132 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:36,824 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 882 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 04:52:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-28 04:52:36,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 193. [2024-11-28 04:52:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 152 states have internal predecessors, (161), 28 states have call successors, (28), 13 states have call predecessors, (28), 22 states have return successors, (64), 27 states have call predecessors, (64), 27 states have call successors, (64) [2024-11-28 04:52:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 253 transitions. [2024-11-28 04:52:36,872 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 253 transitions. Word has length 61 [2024-11-28 04:52:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:36,872 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 253 transitions. [2024-11-28 04:52:36,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:52:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 253 transitions. [2024-11-28 04:52:36,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 04:52:36,874 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:36,874 INFO L218 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] [2024-11-28 04:52:36,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 04:52:37,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:37,079 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:37,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:37,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1930454050, now seen corresponding path program 1 times [2024-11-28 04:52:37,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:37,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105572443] [2024-11-28 04:52:37,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:37,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:37,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:37,081 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:37,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 04:52:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:37,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:52:37,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:52:37,369 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:52:37,698 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:37,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105572443] [2024-11-28 04:52:37,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105572443] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:37,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:37,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-28 04:52:37,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867938592] [2024-11-28 04:52:37,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:37,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:52:37,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:37,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:52:37,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:52:37,700 INFO L87 Difference]: Start difference. First operand 193 states and 253 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:52:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:38,165 INFO L93 Difference]: Finished difference Result 220 states and 300 transitions. [2024-11-28 04:52:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:52:38,166 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-11-28 04:52:38,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:38,167 INFO L225 Difference]: With dead ends: 220 [2024-11-28 04:52:38,167 INFO L226 Difference]: Without dead ends: 206 [2024-11-28 04:52:38,168 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:52:38,168 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 39 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:38,169 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 454 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:52:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-28 04:52:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 190. [2024-11-28 04:52:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 149 states have internal predecessors, (158), 28 states have call successors, (28), 13 states have call predecessors, (28), 21 states have return successors, (61), 27 states have call predecessors, (61), 27 states have call successors, (61) [2024-11-28 04:52:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 247 transitions. [2024-11-28 04:52:38,205 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 247 transitions. Word has length 63 [2024-11-28 04:52:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:38,206 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 247 transitions. [2024-11-28 04:52:38,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:52:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 247 transitions. [2024-11-28 04:52:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 04:52:38,207 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:38,208 INFO L218 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] [2024-11-28 04:52:38,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 04:52:38,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:38,408 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:38,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1140773786, now seen corresponding path program 2 times [2024-11-28 04:52:38,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:38,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809812742] [2024-11-28 04:52:38,409 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:52:38,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:38,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:38,411 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:38,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 04:52:38,471 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:52:38,471 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:38,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:52:38,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:52:38,673 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:52:39,004 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:39,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809812742] [2024-11-28 04:52:39,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809812742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:39,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:39,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-28 04:52:39,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351401671] [2024-11-28 04:52:39,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:39,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:52:39,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:39,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:52:39,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:52:39,006 INFO L87 Difference]: Start difference. First operand 190 states and 247 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:52:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:39,322 INFO L93 Difference]: Finished difference Result 217 states and 294 transitions. [2024-11-28 04:52:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:52:39,323 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2024-11-28 04:52:39,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:39,324 INFO L225 Difference]: With dead ends: 217 [2024-11-28 04:52:39,324 INFO L226 Difference]: Without dead ends: 203 [2024-11-28 04:52:39,324 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:52:39,324 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 29 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:39,324 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 403 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:52:39,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-28 04:52:39,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 185. [2024-11-28 04:52:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 137 states have (on average 1.1240875912408759) internal successors, (154), 145 states have internal predecessors, (154), 27 states have call successors, (27), 13 states have call predecessors, (27), 20 states have return successors, (54), 26 states have call predecessors, (54), 26 states have call successors, (54) [2024-11-28 04:52:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 235 transitions. [2024-11-28 04:52:39,362 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 235 transitions. Word has length 63 [2024-11-28 04:52:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:39,362 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 235 transitions. [2024-11-28 04:52:39,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:52:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 235 transitions. [2024-11-28 04:52:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 04:52:39,364 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:39,365 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:39,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 04:52:39,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:39,565 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:39,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:39,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1001265254, now seen corresponding path program 1 times [2024-11-28 04:52:39,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:39,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055232425] [2024-11-28 04:52:39,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:39,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:39,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:39,568 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:39,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 04:52:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:39,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:52:39,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:52:40,021 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:52:40,674 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:40,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055232425] [2024-11-28 04:52:40,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055232425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:40,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:40,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2024-11-28 04:52:40,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30768022] [2024-11-28 04:52:40,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:40,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:52:40,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:40,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:52:40,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:52:40,676 INFO L87 Difference]: Start difference. First operand 185 states and 235 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 14 states have internal predecessors, (55), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 04:52:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:41,551 INFO L93 Difference]: Finished difference Result 206 states and 262 transitions. [2024-11-28 04:52:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:52:41,551 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 14 states have internal predecessors, (55), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 70 [2024-11-28 04:52:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:41,553 INFO L225 Difference]: With dead ends: 206 [2024-11-28 04:52:41,553 INFO L226 Difference]: Without dead ends: 194 [2024-11-28 04:52:41,554 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:52:41,554 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 17 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:41,554 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 794 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:52:41,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-28 04:52:41,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 184. [2024-11-28 04:52:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 143 states have internal predecessors, (152), 28 states have call successors, (28), 13 states have call predecessors, (28), 19 states have return successors, (54), 27 states have call predecessors, (54), 27 states have call successors, (54) [2024-11-28 04:52:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 234 transitions. [2024-11-28 04:52:41,595 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 234 transitions. Word has length 70 [2024-11-28 04:52:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:41,595 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 234 transitions. [2024-11-28 04:52:41,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 14 states have internal predecessors, (55), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 04:52:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 234 transitions. [2024-11-28 04:52:41,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 04:52:41,597 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:41,597 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:41,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 04:52:41,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:41,798 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:41,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash 871426266, now seen corresponding path program 1 times [2024-11-28 04:52:41,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:41,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077777741] [2024-11-28 04:52:41,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:41,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:41,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:41,800 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:41,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 04:52:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:41,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:52:41,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:52:42,047 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:42,047 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:42,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077777741] [2024-11-28 04:52:42,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077777741] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:42,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:42,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 04:52:42,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801102367] [2024-11-28 04:52:42,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:42,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:52:42,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:42,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:52:42,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:52:42,048 INFO L87 Difference]: Start difference. First operand 184 states and 234 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 04:52:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:42,283 INFO L93 Difference]: Finished difference Result 217 states and 285 transitions. [2024-11-28 04:52:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:52:42,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2024-11-28 04:52:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:42,286 INFO L225 Difference]: With dead ends: 217 [2024-11-28 04:52:42,286 INFO L226 Difference]: Without dead ends: 208 [2024-11-28 04:52:42,286 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:52:42,287 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 23 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:42,287 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 502 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:52:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-28 04:52:42,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2024-11-28 04:52:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 149 states have internal predecessors, (158), 29 states have call successors, (29), 13 states have call predecessors, (29), 20 states have return successors, (61), 27 states have call predecessors, (61), 28 states have call successors, (61) [2024-11-28 04:52:42,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 248 transitions. [2024-11-28 04:52:42,329 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 248 transitions. Word has length 70 [2024-11-28 04:52:42,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:42,330 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 248 transitions. [2024-11-28 04:52:42,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 04:52:42,330 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 248 transitions. [2024-11-28 04:52:42,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 04:52:42,331 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:42,331 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:42,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 04:52:42,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:42,532 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:42,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:42,532 INFO L85 PathProgramCache]: Analyzing trace with hash -755086182, now seen corresponding path program 2 times [2024-11-28 04:52:42,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:42,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024906397] [2024-11-28 04:52:42,533 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:52:42,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:42,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:42,535 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:42,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 04:52:42,599 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:52:42,599 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:42,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:52:42,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 04:52:42,909 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:42,909 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:42,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024906397] [2024-11-28 04:52:42,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024906397] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:42,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:42,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 04:52:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520881324] [2024-11-28 04:52:42,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:42,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:52:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:42,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:52:42,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:52:42,911 INFO L87 Difference]: Start difference. First operand 190 states and 248 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 04:52:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:43,421 INFO L93 Difference]: Finished difference Result 215 states and 272 transitions. [2024-11-28 04:52:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:52:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2024-11-28 04:52:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:43,423 INFO L225 Difference]: With dead ends: 215 [2024-11-28 04:52:43,423 INFO L226 Difference]: Without dead ends: 206 [2024-11-28 04:52:43,424 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:52:43,424 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 14 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:43,425 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 591 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:52:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-28 04:52:43,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 179. [2024-11-28 04:52:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 132 states have (on average 1.128787878787879) internal successors, (149), 140 states have internal predecessors, (149), 27 states have call successors, (27), 13 states have call predecessors, (27), 19 states have return successors, (56), 25 states have call predecessors, (56), 26 states have call successors, (56) [2024-11-28 04:52:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 232 transitions. [2024-11-28 04:52:43,480 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 232 transitions. Word has length 70 [2024-11-28 04:52:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:43,480 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 232 transitions. [2024-11-28 04:52:43,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 9 states have internal predecessors, (46), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 04:52:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 232 transitions. [2024-11-28 04:52:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 04:52:43,482 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:43,482 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:43,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-28 04:52:43,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:43,684 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:43,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:43,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2008188694, now seen corresponding path program 1 times [2024-11-28 04:52:43,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:43,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623757471] [2024-11-28 04:52:43,686 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:43,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:43,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:43,688 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:43,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 04:52:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:43,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 04:52:43,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-28 04:52:44,897 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:44,897 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:44,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623757471] [2024-11-28 04:52:44,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623757471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:44,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:44,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-28 04:52:44,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170171281] [2024-11-28 04:52:44,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:44,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:52:44,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:44,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:52:44,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:52:44,899 INFO L87 Difference]: Start difference. First operand 179 states and 232 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:52:45,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:45,522 INFO L93 Difference]: Finished difference Result 206 states and 263 transitions. [2024-11-28 04:52:45,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:52:45,523 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 70 [2024-11-28 04:52:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:45,525 INFO L225 Difference]: With dead ends: 206 [2024-11-28 04:52:45,525 INFO L226 Difference]: Without dead ends: 197 [2024-11-28 04:52:45,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:52:45,526 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 6 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:45,526 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 528 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:52:45,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-28 04:52:45,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 179. [2024-11-28 04:52:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 132 states have (on average 1.128787878787879) internal successors, (149), 140 states have internal predecessors, (149), 27 states have call successors, (27), 13 states have call predecessors, (27), 19 states have return successors, (55), 25 states have call predecessors, (55), 26 states have call successors, (55) [2024-11-28 04:52:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 231 transitions. [2024-11-28 04:52:45,576 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 231 transitions. Word has length 70 [2024-11-28 04:52:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:45,577 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 231 transitions. [2024-11-28 04:52:45,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:52:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 231 transitions. [2024-11-28 04:52:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 04:52:45,578 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:45,579 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:45,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 04:52:45,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:45,779 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:45,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1117257355, now seen corresponding path program 1 times [2024-11-28 04:52:45,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:45,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511911354] [2024-11-28 04:52:45,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:45,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:45,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:45,782 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:45,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 04:52:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:45,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:52:45,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 04:52:47,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 04:52:50,315 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:50,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511911354] [2024-11-28 04:52:50,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511911354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:50,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:50,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-11-28 04:52:50,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993165874] [2024-11-28 04:52:50,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:50,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:52:50,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:50,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:52:50,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:52:50,318 INFO L87 Difference]: Start difference. First operand 179 states and 231 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 04:52:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:56,873 INFO L93 Difference]: Finished difference Result 218 states and 275 transitions. [2024-11-28 04:52:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:52:56,874 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 70 [2024-11-28 04:52:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:56,876 INFO L225 Difference]: With dead ends: 218 [2024-11-28 04:52:56,876 INFO L226 Difference]: Without dead ends: 209 [2024-11-28 04:52:56,877 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 04:52:56,877 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 90 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:56,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 936 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-28 04:52:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-28 04:52:56,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 179. [2024-11-28 04:52:56,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 132 states have (on average 1.128787878787879) internal successors, (149), 140 states have internal predecessors, (149), 27 states have call successors, (27), 13 states have call predecessors, (27), 19 states have return successors, (54), 25 states have call predecessors, (54), 26 states have call successors, (54) [2024-11-28 04:52:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 230 transitions. [2024-11-28 04:52:56,927 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 230 transitions. Word has length 70 [2024-11-28 04:52:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:56,927 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 230 transitions. [2024-11-28 04:52:56,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 04:52:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 230 transitions. [2024-11-28 04:52:56,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 04:52:56,929 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:56,929 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:56,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-28 04:52:57,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:57,130 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:57,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:57,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1336112073, now seen corresponding path program 1 times [2024-11-28 04:52:57,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:57,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489646375] [2024-11-28 04:52:57,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:57,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:57,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:57,132 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:57,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 04:52:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:57,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 04:52:57,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:52:58,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 04:53:01,852 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:53:01,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489646375] [2024-11-28 04:53:01,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489646375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:01,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:01,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-28 04:53:01,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003480035] [2024-11-28 04:53:01,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:01,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:53:01,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:53:01,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:53:01,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:53:01,855 INFO L87 Difference]: Start difference. First operand 179 states and 230 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 04:53:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:08,498 INFO L93 Difference]: Finished difference Result 269 states and 353 transitions. [2024-11-28 04:53:08,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 04:53:08,499 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 70 [2024-11-28 04:53:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:08,501 INFO L225 Difference]: With dead ends: 269 [2024-11-28 04:53:08,501 INFO L226 Difference]: Without dead ends: 252 [2024-11-28 04:53:08,502 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=342, Invalid=2108, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 04:53:08,504 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 130 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:08,504 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 923 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-28 04:53:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-28 04:53:08,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 226. [2024-11-28 04:53:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 178 states have internal predecessors, (189), 36 states have call successors, (36), 14 states have call predecessors, (36), 23 states have return successors, (75), 33 states have call predecessors, (75), 35 states have call successors, (75) [2024-11-28 04:53:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 300 transitions. [2024-11-28 04:53:08,569 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 300 transitions. Word has length 70 [2024-11-28 04:53:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:08,569 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 300 transitions. [2024-11-28 04:53:08,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 04:53:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 300 transitions. [2024-11-28 04:53:08,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 04:53:08,571 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:08,571 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:08,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 04:53:08,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:08,772 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:08,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:08,773 INFO L85 PathProgramCache]: Analyzing trace with hash -728109811, now seen corresponding path program 2 times [2024-11-28 04:53:08,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:53:08,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746451431] [2024-11-28 04:53:08,773 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:53:08,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:08,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:08,775 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:08,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 04:53:08,862 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:53:08,862 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:08,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 04:53:08,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:53:10,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 04:53:13,538 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:53:13,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746451431] [2024-11-28 04:53:13,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746451431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:13,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:13,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-28 04:53:13,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579118962] [2024-11-28 04:53:13,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:13,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:53:13,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:53:13,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:53:13,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:53:13,540 INFO L87 Difference]: Start difference. First operand 226 states and 300 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 04:53:18,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:18,355 INFO L93 Difference]: Finished difference Result 307 states and 406 transitions. [2024-11-28 04:53:18,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 04:53:18,356 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 70 [2024-11-28 04:53:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:18,359 INFO L225 Difference]: With dead ends: 307 [2024-11-28 04:53:18,359 INFO L226 Difference]: Without dead ends: 290 [2024-11-28 04:53:18,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 04:53:18,361 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 46 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:18,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 894 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-28 04:53:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-11-28 04:53:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 262. [2024-11-28 04:53:18,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 192 states have (on average 1.1458333333333333) internal successors, (220), 207 states have internal predecessors, (220), 43 states have call successors, (43), 15 states have call predecessors, (43), 26 states have return successors, (91), 39 states have call predecessors, (91), 42 states have call successors, (91) [2024-11-28 04:53:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 354 transitions. [2024-11-28 04:53:18,447 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 354 transitions. Word has length 70 [2024-11-28 04:53:18,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:18,447 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 354 transitions. [2024-11-28 04:53:18,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 04:53:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 354 transitions. [2024-11-28 04:53:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 04:53:18,450 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:18,450 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:18,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-28 04:53:18,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:18,654 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:18,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:18,654 INFO L85 PathProgramCache]: Analyzing trace with hash -250571237, now seen corresponding path program 1 times [2024-11-28 04:53:18,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:53:18,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54442674] [2024-11-28 04:53:18,655 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:18,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:18,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:18,657 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:18,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 04:53:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:18,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:53:18,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 04:53:20,363 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:21,330 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:53:21,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54442674] [2024-11-28 04:53:21,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54442674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:21,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [961858382] [2024-11-28 04:53:21,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:21,331 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:53:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:53:21,333 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:53:21,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2024-11-28 04:53:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:21,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:53:21,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-28 04:53:22,111 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:53:22,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [961858382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:22,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:53:22,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2024-11-28 04:53:22,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389415194] [2024-11-28 04:53:22,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:22,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:53:22,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:53:22,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:53:22,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:53:22,113 INFO L87 Difference]: Start difference. First operand 262 states and 354 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:53:22,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:22,260 INFO L93 Difference]: Finished difference Result 291 states and 403 transitions. [2024-11-28 04:53:22,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:53:22,260 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), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 72 [2024-11-28 04:53:22,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:22,262 INFO L225 Difference]: With dead ends: 291 [2024-11-28 04:53:22,262 INFO L226 Difference]: Without dead ends: 266 [2024-11-28 04:53:22,263 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:53:22,263 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 9 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:22,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 274 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:53:22,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-11-28 04:53:22,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 250. [2024-11-28 04:53:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 183 states have (on average 1.1366120218579234) internal successors, (208), 196 states have internal predecessors, (208), 41 states have call successors, (41), 15 states have call predecessors, (41), 25 states have return successors, (88), 38 states have call predecessors, (88), 40 states have call successors, (88) [2024-11-28 04:53:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 337 transitions. [2024-11-28 04:53:22,347 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 337 transitions. Word has length 72 [2024-11-28 04:53:22,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:22,348 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 337 transitions. [2024-11-28 04:53:22,348 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), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 04:53:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 337 transitions. [2024-11-28 04:53:22,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 04:53:22,350 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:22,350 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:22,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-28 04:53:22,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2024-11-28 04:53:22,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:53:22,751 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:22,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:22,751 INFO L85 PathProgramCache]: Analyzing trace with hash -31716519, now seen corresponding path program 1 times [2024-11-28 04:53:22,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:53:22,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481283869] [2024-11-28 04:53:22,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:22,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:22,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:22,753 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:22,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 04:53:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:22,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 04:53:22,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:53:24,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 04:53:27,604 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:53:27,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481283869] [2024-11-28 04:53:27,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481283869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:27,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:27,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-28 04:53:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161782556] [2024-11-28 04:53:27,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:27,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:53:27,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:53:27,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:53:27,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:53:27,606 INFO L87 Difference]: Start difference. First operand 250 states and 337 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 04:53:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:31,537 INFO L93 Difference]: Finished difference Result 294 states and 388 transitions. [2024-11-28 04:53:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 04:53:31,538 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-11-28 04:53:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:31,540 INFO L225 Difference]: With dead ends: 294 [2024-11-28 04:53:31,540 INFO L226 Difference]: Without dead ends: 274 [2024-11-28 04:53:31,541 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 04:53:31,541 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 44 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:31,541 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1264 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-28 04:53:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-28 04:53:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 259. [2024-11-28 04:53:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 190 states have (on average 1.131578947368421) internal successors, (215), 203 states have internal predecessors, (215), 42 states have call successors, (42), 16 states have call predecessors, (42), 26 states have return successors, (87), 39 states have call predecessors, (87), 41 states have call successors, (87) [2024-11-28 04:53:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 344 transitions. [2024-11-28 04:53:31,606 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 344 transitions. Word has length 72 [2024-11-28 04:53:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:31,606 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 344 transitions. [2024-11-28 04:53:31,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 04:53:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 344 transitions. [2024-11-28 04:53:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 04:53:31,607 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:31,607 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:31,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-28 04:53:31,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:31,808 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:31,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:31,808 INFO L85 PathProgramCache]: Analyzing trace with hash -922647858, now seen corresponding path program 1 times [2024-11-28 04:53:31,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:53:31,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660521240] [2024-11-28 04:53:31,808 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:31,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:31,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:31,810 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:31,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-28 04:53:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:31,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:53:31,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 04:53:31,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 04:53:32,096 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:53:32,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660521240] [2024-11-28 04:53:32,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660521240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:32,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:32,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-28 04:53:32,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897696286] [2024-11-28 04:53:32,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:32,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:53:32,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:53:32,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:53:32,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:53:32,097 INFO L87 Difference]: Start difference. First operand 259 states and 344 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 04:53:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:32,223 INFO L93 Difference]: Finished difference Result 269 states and 354 transitions. [2024-11-28 04:53:32,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:53:32,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 72 [2024-11-28 04:53:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:32,226 INFO L225 Difference]: With dead ends: 269 [2024-11-28 04:53:32,226 INFO L226 Difference]: Without dead ends: 264 [2024-11-28 04:53:32,226 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:53:32,227 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:32,227 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 324 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:53:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-28 04:53:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 257. [2024-11-28 04:53:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 189 states have (on average 1.1322751322751323) internal successors, (214), 202 states have internal predecessors, (214), 41 states have call successors, (41), 16 states have call predecessors, (41), 26 states have return successors, (84), 38 states have call predecessors, (84), 40 states have call successors, (84) [2024-11-28 04:53:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 339 transitions. [2024-11-28 04:53:32,301 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 339 transitions. Word has length 72 [2024-11-28 04:53:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:32,301 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 339 transitions. [2024-11-28 04:53:32,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 04:53:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 339 transitions. [2024-11-28 04:53:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-28 04:53:32,303 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:32,303 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:32,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-28 04:53:32,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:32,503 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:32,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:32,504 INFO L85 PathProgramCache]: Analyzing trace with hash 173075485, now seen corresponding path program 2 times [2024-11-28 04:53:32,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:53:32,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990014473] [2024-11-28 04:53:32,504 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:53:32,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:32,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:32,506 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:32,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-28 04:53:32,585 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:53:32,585 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:32,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 04:53:32,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:53:33,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 04:53:37,532 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:53:37,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990014473] [2024-11-28 04:53:37,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990014473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:37,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:37,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-28 04:53:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609522863] [2024-11-28 04:53:37,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:37,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:53:37,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:53:37,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:53:37,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:53:37,534 INFO L87 Difference]: Start difference. First operand 257 states and 339 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 04:53:41,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:41,133 INFO L93 Difference]: Finished difference Result 293 states and 378 transitions. [2024-11-28 04:53:41,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:53:41,134 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2024-11-28 04:53:41,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:41,136 INFO L225 Difference]: With dead ends: 293 [2024-11-28 04:53:41,136 INFO L226 Difference]: Without dead ends: 279 [2024-11-28 04:53:41,137 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 04:53:41,137 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 40 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:41,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 890 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-28 04:53:41,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-11-28 04:53:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 265. [2024-11-28 04:53:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 196 states have (on average 1.1326530612244898) internal successors, (222), 208 states have internal predecessors, (222), 42 states have call successors, (42), 17 states have call predecessors, (42), 26 states have return successors, (82), 39 states have call predecessors, (82), 41 states have call successors, (82) [2024-11-28 04:53:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 346 transitions. [2024-11-28 04:53:41,242 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 346 transitions. Word has length 72 [2024-11-28 04:53:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:41,242 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 346 transitions. [2024-11-28 04:53:41,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 04:53:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 346 transitions. [2024-11-28 04:53:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-28 04:53:41,244 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:41,244 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:41,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-28 04:53:41,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:41,445 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:41,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:41,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1182231736, now seen corresponding path program 1 times [2024-11-28 04:53:41,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:53:41,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180375013] [2024-11-28 04:53:41,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:41,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:41,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:41,449 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:41,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-28 04:53:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:41,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:53:41,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:53:41,653 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:53:41,653 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:53:41,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180375013] [2024-11-28 04:53:41,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180375013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:53:41,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:53:41,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:53:41,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387111193] [2024-11-28 04:53:41,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:53:41,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:53:41,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:53:41,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:53:41,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:53:41,655 INFO L87 Difference]: Start difference. First operand 265 states and 346 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-28 04:53:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:41,792 INFO L93 Difference]: Finished difference Result 276 states and 357 transitions. [2024-11-28 04:53:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:53:41,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 74 [2024-11-28 04:53:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:41,794 INFO L225 Difference]: With dead ends: 276 [2024-11-28 04:53:41,794 INFO L226 Difference]: Without dead ends: 267 [2024-11-28 04:53:41,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:53:41,795 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:41,795 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 315 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:53:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-28 04:53:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2024-11-28 04:53:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 197 states have (on average 1.131979695431472) internal successors, (223), 208 states have internal predecessors, (223), 41 states have call successors, (41), 17 states have call predecessors, (41), 26 states have return successors, (74), 39 states have call predecessors, (74), 40 states have call successors, (74) [2024-11-28 04:53:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 338 transitions. [2024-11-28 04:53:41,852 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 338 transitions. Word has length 74 [2024-11-28 04:53:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:41,852 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 338 transitions. [2024-11-28 04:53:41,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-28 04:53:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 338 transitions. [2024-11-28 04:53:41,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 04:53:41,854 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:41,854 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:41,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-28 04:53:42,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:42,054 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:42,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:42,055 INFO L85 PathProgramCache]: Analyzing trace with hash -193173504, now seen corresponding path program 1 times [2024-11-28 04:53:42,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:53:42,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408975485] [2024-11-28 04:53:42,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:42,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:42,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:42,056 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:42,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-28 04:53:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:42,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:53:42,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 04:53:43,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:53:45,949 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:53:45,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408975485] [2024-11-28 04:53:45,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408975485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:53:45,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:45,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-28 04:53:45,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758654795] [2024-11-28 04:53:45,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:45,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 04:53:45,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:53:45,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 04:53:45,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-11-28 04:53:45,951 INFO L87 Difference]: Start difference. First operand 265 states and 338 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-28 04:53:49,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:49,860 INFO L93 Difference]: Finished difference Result 296 states and 368 transitions. [2024-11-28 04:53:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 04:53:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 76 [2024-11-28 04:53:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:49,863 INFO L225 Difference]: With dead ends: 296 [2024-11-28 04:53:49,863 INFO L226 Difference]: Without dead ends: 232 [2024-11-28 04:53:49,864 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:53:49,865 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 55 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:49,865 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 846 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 04:53:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-28 04:53:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 213. [2024-11-28 04:53:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 159 states have (on average 1.10062893081761) internal successors, (175), 166 states have internal predecessors, (175), 32 states have call successors, (32), 15 states have call predecessors, (32), 21 states have return successors, (56), 31 states have call predecessors, (56), 31 states have call successors, (56) [2024-11-28 04:53:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 263 transitions. [2024-11-28 04:53:49,940 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 263 transitions. Word has length 76 [2024-11-28 04:53:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:49,941 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 263 transitions. [2024-11-28 04:53:49,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-28 04:53:49,941 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 263 transitions. [2024-11-28 04:53:49,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 04:53:49,942 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:49,942 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:49,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-28 04:53:50,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:50,143 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:50,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:50,143 INFO L85 PathProgramCache]: Analyzing trace with hash 682554387, now seen corresponding path program 1 times [2024-11-28 04:53:50,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:53:50,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430398286] [2024-11-28 04:53:50,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:50,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:50,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:50,145 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:50,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-28 04:53:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:50,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:53:50,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:53:51,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:51,565 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:53:51,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430398286] [2024-11-28 04:53:51,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430398286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1839728734] [2024-11-28 04:53:51,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:51,566 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:53:51,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:53:51,568 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:53:51,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2024-11-28 04:53:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:51,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 04:53:51,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:53:52,169 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:52,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1839728734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:52,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:52,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2024-11-28 04:53:52,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531582138] [2024-11-28 04:53:52,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:52,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:53:52,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:53:52,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:53:52,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:53:52,509 INFO L87 Difference]: Start difference. First operand 213 states and 263 transitions. Second operand has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:53:54,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:54,557 INFO L93 Difference]: Finished difference Result 235 states and 291 transitions. [2024-11-28 04:53:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 04:53:54,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 79 [2024-11-28 04:53:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:54,559 INFO L225 Difference]: With dead ends: 235 [2024-11-28 04:53:54,560 INFO L226 Difference]: Without dead ends: 226 [2024-11-28 04:53:54,560 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:53:54,561 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 27 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:54,561 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 874 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 04:53:54,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-28 04:53:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 219. [2024-11-28 04:53:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 163 states have (on average 1.098159509202454) internal successors, (179), 170 states have internal predecessors, (179), 33 states have call successors, (33), 15 states have call predecessors, (33), 22 states have return successors, (63), 33 states have call predecessors, (63), 32 states have call successors, (63) [2024-11-28 04:53:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 275 transitions. [2024-11-28 04:53:54,608 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 275 transitions. Word has length 79 [2024-11-28 04:53:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:54,608 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 275 transitions. [2024-11-28 04:53:54,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:53:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 275 transitions. [2024-11-28 04:53:54,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 04:53:54,610 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:54,610 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:54,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2024-11-28 04:53:54,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-28 04:53:55,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:55,011 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:53:55,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:55,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2068757781, now seen corresponding path program 1 times [2024-11-28 04:53:55,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:53:55,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216144265] [2024-11-28 04:53:55,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:55,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:55,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:55,016 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:55,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-28 04:53:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:55,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:53:55,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:54:06,064 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:07,200 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:54:07,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216144265] [2024-11-28 04:54:07,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216144265] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:07,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [249719185] [2024-11-28 04:54:07,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:07,200 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:54:07,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:54:07,202 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:54:07,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2024-11-28 04:54:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:07,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:54:07,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:54:33,747 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:35,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [249719185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:54:35,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:35,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2024-11-28 04:54:35,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333652783] [2024-11-28 04:54:35,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:35,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:54:35,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:54:35,093 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:54:35,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=229, Unknown=7, NotChecked=0, Total=272 [2024-11-28 04:54:35,094 INFO L87 Difference]: Start difference. First operand 219 states and 275 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 04:54:39,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:39,328 INFO L93 Difference]: Finished difference Result 237 states and 293 transitions. [2024-11-28 04:54:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:54:39,330 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 79 [2024-11-28 04:54:39,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:39,331 INFO L225 Difference]: With dead ends: 237 [2024-11-28 04:54:39,331 INFO L226 Difference]: Without dead ends: 228 [2024-11-28 04:54:39,332 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=41, Invalid=258, Unknown=7, NotChecked=0, Total=306 [2024-11-28 04:54:39,332 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 14 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:39,332 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 751 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-28 04:54:39,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-28 04:54:39,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 223. [2024-11-28 04:54:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 166 states have (on average 1.0963855421686748) internal successors, (182), 173 states have internal predecessors, (182), 33 states have call successors, (33), 15 states have call predecessors, (33), 23 states have return successors, (64), 34 states have call predecessors, (64), 32 states have call successors, (64) [2024-11-28 04:54:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 279 transitions. [2024-11-28 04:54:39,386 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 279 transitions. Word has length 79 [2024-11-28 04:54:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:39,386 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 279 transitions. [2024-11-28 04:54:39,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 04:54:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 279 transitions. [2024-11-28 04:54:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 04:54:39,388 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:39,388 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:39,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-11-28 04:54:39,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2024-11-28 04:54:39,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:54:39,790 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:39,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:39,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1596132932, now seen corresponding path program 2 times [2024-11-28 04:54:39,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:54:39,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199937857] [2024-11-28 04:54:39,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:54:39,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:39,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:39,794 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:39,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-28 04:54:39,912 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:54:39,912 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:39,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:54:39,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 04:54:41,258 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:54:44,565 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:54:44,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199937857] [2024-11-28 04:54:44,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199937857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:44,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:44,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-28 04:54:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077433858] [2024-11-28 04:54:44,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:44,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 04:54:44,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:54:44,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 04:54:44,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-11-28 04:54:44,567 INFO L87 Difference]: Start difference. First operand 223 states and 279 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-28 04:54:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:47,846 INFO L93 Difference]: Finished difference Result 239 states and 295 transitions. [2024-11-28 04:54:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:54:47,848 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 76 [2024-11-28 04:54:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:47,849 INFO L225 Difference]: With dead ends: 239 [2024-11-28 04:54:47,849 INFO L226 Difference]: Without dead ends: 198 [2024-11-28 04:54:47,850 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:54:47,851 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 49 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:47,851 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 896 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 04:54:47,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-28 04:54:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2024-11-28 04:54:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 148 states have (on average 1.087837837837838) internal successors, (161), 153 states have internal predecessors, (161), 29 states have call successors, (29), 14 states have call predecessors, (29), 20 states have return successors, (56), 30 states have call predecessors, (56), 28 states have call successors, (56) [2024-11-28 04:54:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 246 transitions. [2024-11-28 04:54:47,923 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 246 transitions. Word has length 76 [2024-11-28 04:54:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:47,923 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 246 transitions. [2024-11-28 04:54:47,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-28 04:54:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 246 transitions. [2024-11-28 04:54:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 04:54:47,925 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:47,925 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:47,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-28 04:54:48,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:48,125 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:48,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1272007593, now seen corresponding path program 2 times [2024-11-28 04:54:48,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:54:48,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179243019] [2024-11-28 04:54:48,126 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:54:48,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:48,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:48,131 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:48,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-28 04:54:48,220 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:54:48,220 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:48,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:54:48,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:54:49,663 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:54:49,663 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:54:49,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179243019] [2024-11-28 04:54:49,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179243019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:54:49,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:54:49,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-28 04:54:49,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127421426] [2024-11-28 04:54:49,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:54:49,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:54:49,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:54:49,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:54:49,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:54:49,665 INFO L87 Difference]: Start difference. First operand 198 states and 246 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 04:54:55,264 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] [2024-11-28 04:54:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:58,327 INFO L93 Difference]: Finished difference Result 214 states and 263 transitions. [2024-11-28 04:54:58,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:54:58,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 79 [2024-11-28 04:54:58,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:58,329 INFO L225 Difference]: With dead ends: 214 [2024-11-28 04:54:58,329 INFO L226 Difference]: Without dead ends: 205 [2024-11-28 04:54:58,329 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:54:58,330 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 28 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:58,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 569 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2024-11-28 04:54:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-28 04:54:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 200. [2024-11-28 04:54:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 149 states have (on average 1.087248322147651) internal successors, (162), 154 states have internal predecessors, (162), 30 states have call successors, (30), 14 states have call predecessors, (30), 20 states have return successors, (56), 31 states have call predecessors, (56), 29 states have call successors, (56) [2024-11-28 04:54:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2024-11-28 04:54:58,405 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 79 [2024-11-28 04:54:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:58,405 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2024-11-28 04:54:58,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 04:54:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2024-11-28 04:54:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 04:54:58,407 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:58,407 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:58,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-28 04:54:58,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:58,608 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:58,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:58,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1365943909, now seen corresponding path program 1 times [2024-11-28 04:54:58,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:54:58,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296555492] [2024-11-28 04:54:58,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:58,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:58,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:58,610 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:58,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-28 04:54:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:58,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 04:54:58,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:55:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 04:55:03,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:55:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 04:55:19,375 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:55:19,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296555492] [2024-11-28 04:55:19,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296555492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:55:19,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:55:19,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 47 [2024-11-28 04:55:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817453547] [2024-11-28 04:55:19,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:55:19,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-28 04:55:19,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:55:19,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-28 04:55:19,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 04:55:19,377 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand has 47 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 43 states have internal predecessors, (76), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-28 04:55:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:55:46,192 INFO L93 Difference]: Finished difference Result 231 states and 283 transitions. [2024-11-28 04:55:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-28 04:55:46,194 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 43 states have internal predecessors, (76), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 79 [2024-11-28 04:55:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:55:46,196 INFO L225 Difference]: With dead ends: 231 [2024-11-28 04:55:46,196 INFO L226 Difference]: Without dead ends: 219 [2024-11-28 04:55:46,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=502, Invalid=3788, Unknown=0, NotChecked=0, Total=4290 [2024-11-28 04:55:46,198 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:55:46,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1064 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2024-11-28 04:55:46,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-28 04:55:46,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 200. [2024-11-28 04:55:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 149 states have (on average 1.087248322147651) internal successors, (162), 154 states have internal predecessors, (162), 30 states have call successors, (30), 14 states have call predecessors, (30), 20 states have return successors, (56), 31 states have call predecessors, (56), 29 states have call successors, (56) [2024-11-28 04:55:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2024-11-28 04:55:46,260 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 79 [2024-11-28 04:55:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:55:46,261 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2024-11-28 04:55:46,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 43 states have internal predecessors, (76), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-28 04:55:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2024-11-28 04:55:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 04:55:46,263 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:55:46,263 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:55:46,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-28 04:55:46,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:55:46,464 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:55:46,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:55:46,464 INFO L85 PathProgramCache]: Analyzing trace with hash -812985257, now seen corresponding path program 2 times [2024-11-28 04:55:46,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:55:46,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706950937] [2024-11-28 04:55:46,465 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:55:46,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:55:46,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:55:46,469 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:55:46,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-28 04:55:46,762 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:55:46,762 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:55:46,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 04:55:46,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:55:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 04:55:50,643 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:56:04,684 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:56:04,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706950937] [2024-11-28 04:56:04,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706950937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:04,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:56:04,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2024-11-28 04:56:04,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463466610] [2024-11-28 04:56:04,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:04,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 04:56:04,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:56:04,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 04:56:04,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1665, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 04:56:04,687 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand has 44 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-28 04:56:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:30,388 INFO L93 Difference]: Finished difference Result 239 states and 292 transitions. [2024-11-28 04:56:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 04:56:30,389 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 79 [2024-11-28 04:56:30,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:30,391 INFO L225 Difference]: With dead ends: 239 [2024-11-28 04:56:30,391 INFO L226 Difference]: Without dead ends: 226 [2024-11-28 04:56:30,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=489, Invalid=3801, Unknown=0, NotChecked=0, Total=4290 [2024-11-28 04:56:30,392 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 59 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:30,392 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 971 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2024-11-28 04:56:30,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-28 04:56:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 207. [2024-11-28 04:56:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 156 states have (on average 1.0897435897435896) internal successors, (170), 160 states have internal predecessors, (170), 30 states have call successors, (30), 15 states have call predecessors, (30), 20 states have return successors, (54), 31 states have call predecessors, (54), 29 states have call successors, (54) [2024-11-28 04:56:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 254 transitions. [2024-11-28 04:56:30,459 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 254 transitions. Word has length 79 [2024-11-28 04:56:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:30,459 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 254 transitions. [2024-11-28 04:56:30,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.6904761904761905) internal successors, (71), 41 states have internal predecessors, (71), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-28 04:56:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 254 transitions. [2024-11-28 04:56:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 04:56:30,460 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:30,460 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:30,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-28 04:56:30,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:30,665 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:30,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:30,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1299061009, now seen corresponding path program 1 times [2024-11-28 04:56:30,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:56:30,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1761779815] [2024-11-28 04:56:30,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:30,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:30,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:30,668 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:30,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-28 04:56:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:30,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:56:30,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:56:31,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:56:32,211 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:56:32,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761779815] [2024-11-28 04:56:32,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761779815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:32,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:56:32,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2024-11-28 04:56:32,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786696373] [2024-11-28 04:56:32,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:32,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:56:32,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:56:32,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:56:32,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:56:32,213 INFO L87 Difference]: Start difference. First operand 207 states and 254 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 15 states have internal predecessors, (66), 7 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-28 04:56:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:33,400 INFO L93 Difference]: Finished difference Result 218 states and 266 transitions. [2024-11-28 04:56:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:56:33,401 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 15 states have internal predecessors, (66), 7 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) Word has length 80 [2024-11-28 04:56:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:33,402 INFO L225 Difference]: With dead ends: 218 [2024-11-28 04:56:33,402 INFO L226 Difference]: Without dead ends: 150 [2024-11-28 04:56:33,402 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:56:33,403 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 28 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:33,403 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 794 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 04:56:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-28 04:56:33,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-28 04:56:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 112 states have (on average 1.125) internal successors, (126), 116 states have internal predecessors, (126), 22 states have call successors, (22), 10 states have call predecessors, (22), 15 states have return successors, (44), 23 states have call predecessors, (44), 21 states have call successors, (44) [2024-11-28 04:56:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 192 transitions. [2024-11-28 04:56:33,440 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 192 transitions. Word has length 80 [2024-11-28 04:56:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:33,440 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 192 transitions. [2024-11-28 04:56:33,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 15 states have internal predecessors, (66), 7 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-28 04:56:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 192 transitions. [2024-11-28 04:56:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 04:56:33,441 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:33,441 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:33,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-28 04:56:33,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:33,641 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:33,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1760940245, now seen corresponding path program 2 times [2024-11-28 04:56:33,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:56:33,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922588082] [2024-11-28 04:56:33,642 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:56:33,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:33,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:33,644 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:33,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-28 04:56:33,724 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:56:33,724 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:56:33,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:56:33,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:56:34,093 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:56:34,093 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:56:34,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922588082] [2024-11-28 04:56:34,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922588082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:34,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:34,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 04:56:34,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639565775] [2024-11-28 04:56:34,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:34,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:56:34,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:56:34,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:56:34,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:56:34,094 INFO L87 Difference]: Start difference. First operand 150 states and 192 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 04:56:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:34,615 INFO L93 Difference]: Finished difference Result 161 states and 203 transitions. [2024-11-28 04:56:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:56:34,616 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), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 80 [2024-11-28 04:56:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:34,617 INFO L225 Difference]: With dead ends: 161 [2024-11-28 04:56:34,617 INFO L226 Difference]: Without dead ends: 118 [2024-11-28 04:56:34,617 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:56:34,618 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 14 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:34,618 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 473 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:56:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-28 04:56:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2024-11-28 04:56:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 87 states have internal predecessors, (98), 18 states have call successors, (18), 8 states have call predecessors, (18), 11 states have return successors, (37), 19 states have call predecessors, (37), 17 states have call successors, (37) [2024-11-28 04:56:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 153 transitions. [2024-11-28 04:56:34,676 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 153 transitions. Word has length 80 [2024-11-28 04:56:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:34,676 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 153 transitions. [2024-11-28 04:56:34,676 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), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 04:56:34,677 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 153 transitions. [2024-11-28 04:56:34,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 04:56:34,678 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:34,678 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:34,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-11-28 04:56:34,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:34,879 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:34,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:34,879 INFO L85 PathProgramCache]: Analyzing trace with hash -377998745, now seen corresponding path program 1 times [2024-11-28 04:56:34,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:56:34,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053228359] [2024-11-28 04:56:34,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:34,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:34,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:34,882 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:34,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-28 04:56:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:34,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:56:34,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:56:35,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:56:36,648 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:56:36,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053228359] [2024-11-28 04:56:36,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053228359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:36,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:56:36,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-11-28 04:56:36,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746018076] [2024-11-28 04:56:36,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:36,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:56:36,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:56:36,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:56:36,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:56:36,651 INFO L87 Difference]: Start difference. First operand 115 states and 153 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-28 04:56:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:37,718 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2024-11-28 04:56:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:56:37,718 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 80 [2024-11-28 04:56:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:37,719 INFO L225 Difference]: With dead ends: 124 [2024-11-28 04:56:37,719 INFO L226 Difference]: Without dead ends: 111 [2024-11-28 04:56:37,720 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:56:37,720 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 74 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:37,720 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 455 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:56:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-28 04:56:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-28 04:56:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 85 states have internal predecessors, (95), 17 states have call successors, (17), 7 states have call predecessors, (17), 11 states have return successors, (35), 18 states have call predecessors, (35), 16 states have call successors, (35) [2024-11-28 04:56:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2024-11-28 04:56:37,759 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 80 [2024-11-28 04:56:37,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:37,759 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2024-11-28 04:56:37,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-28 04:56:37,759 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2024-11-28 04:56:37,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-28 04:56:37,760 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:37,760 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:37,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-11-28 04:56:37,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:37,961 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:37,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:37,961 INFO L85 PathProgramCache]: Analyzing trace with hash -486416319, now seen corresponding path program 1 times [2024-11-28 04:56:37,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:56:37,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561844524] [2024-11-28 04:56:37,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:37,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:37,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:37,964 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:37,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-28 04:56:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:38,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 04:56:38,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 04:56:42,205 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:56:53,765 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:56:53,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561844524] [2024-11-28 04:56:53,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561844524] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:53,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:56:53,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2024-11-28 04:56:53,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654103824] [2024-11-28 04:56:53,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:53,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 04:56:53,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:56:53,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 04:56:53,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 04:56:53,767 INFO L87 Difference]: Start difference. First operand 111 states and 147 transitions. Second operand has 44 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-28 04:57:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:57:24,742 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2024-11-28 04:57:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-28 04:57:24,743 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 77 [2024-11-28 04:57:24,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:57:24,744 INFO L225 Difference]: With dead ends: 154 [2024-11-28 04:57:24,744 INFO L226 Difference]: Without dead ends: 135 [2024-11-28 04:57:24,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=538, Invalid=5624, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 04:57:24,745 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:57:24,745 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1395 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1881 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2024-11-28 04:57:24,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-28 04:57:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 121. [2024-11-28 04:57:24,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 93 states have internal predecessors, (105), 18 states have call successors, (18), 8 states have call predecessors, (18), 11 states have return successors, (33), 19 states have call predecessors, (33), 17 states have call successors, (33) [2024-11-28 04:57:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 156 transitions. [2024-11-28 04:57:24,785 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 156 transitions. Word has length 77 [2024-11-28 04:57:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:57:24,786 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 156 transitions. [2024-11-28 04:57:24,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-28 04:57:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 156 transitions. [2024-11-28 04:57:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 04:57:24,786 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:57:24,787 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:57:24,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-11-28 04:57:24,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:24,987 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:57:24,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:57:24,987 INFO L85 PathProgramCache]: Analyzing trace with hash -416149717, now seen corresponding path program 2 times [2024-11-28 04:57:24,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:57:24,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617978935] [2024-11-28 04:57:24,988 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:57:24,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:24,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:57:24,992 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:57:24,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-28 04:57:25,082 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:57:25,082 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:57:25,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:57:25,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:57:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:57:25,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:57:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:57:26,520 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:57:26,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617978935] [2024-11-28 04:57:26,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617978935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:57:26,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:57:26,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-11-28 04:57:26,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127151338] [2024-11-28 04:57:26,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:57:26,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:57:26,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:57:26,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:57:26,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:57:26,522 INFO L87 Difference]: Start difference. First operand 121 states and 156 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-28 04:57:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:57:27,822 INFO L93 Difference]: Finished difference Result 128 states and 162 transitions. [2024-11-28 04:57:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:57:27,823 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 80 [2024-11-28 04:57:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:57:27,824 INFO L225 Difference]: With dead ends: 128 [2024-11-28 04:57:27,824 INFO L226 Difference]: Without dead ends: 105 [2024-11-28 04:57:27,824 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:57:27,824 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 72 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:57:27,825 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 630 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:57:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-28 04:57:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2024-11-28 04:57:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 74 states have internal predecessors, (82), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (28), 15 states have call predecessors, (28), 14 states have call successors, (28) [2024-11-28 04:57:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2024-11-28 04:57:27,878 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 80 [2024-11-28 04:57:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:57:27,878 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2024-11-28 04:57:27,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-28 04:57:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2024-11-28 04:57:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-28 04:57:27,880 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:57:27,880 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:57:27,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-11-28 04:57:28,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:28,081 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:57:28,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:57:28,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1223001665, now seen corresponding path program 2 times [2024-11-28 04:57:28,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:57:28,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371062350] [2024-11-28 04:57:28,081 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:57:28,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:28,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:57:28,083 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:57:28,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-28 04:57:28,265 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:57:28,265 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:57:28,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-28 04:57:28,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:57:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 04:57:32,353 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:57:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 04:57:42,673 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:57:42,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371062350] [2024-11-28 04:57:42,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371062350] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:57:42,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:57:42,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2024-11-28 04:57:42,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650722803] [2024-11-28 04:57:42,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:57:42,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 04:57:42,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:57:42,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 04:57:42,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 04:57:42,675 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 43 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 40 states have internal predecessors, (68), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-28 04:58:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:58:04,911 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2024-11-28 04:58:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-28 04:58:04,912 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 40 states have internal predecessors, (68), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) Word has length 77 [2024-11-28 04:58:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:58:04,913 INFO L225 Difference]: With dead ends: 137 [2024-11-28 04:58:04,913 INFO L226 Difference]: Without dead ends: 124 [2024-11-28 04:58:04,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=440, Invalid=4530, Unknown=0, NotChecked=0, Total=4970 [2024-11-28 04:58:04,914 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 45 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:58:04,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1197 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2024-11-28 04:58:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-11-28 04:58:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2024-11-28 04:58:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.144927536231884) internal successors, (79), 71 states have internal predecessors, (79), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (25), 15 states have call predecessors, (25), 14 states have call successors, (25) [2024-11-28 04:58:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2024-11-28 04:58:04,964 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 77 [2024-11-28 04:58:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:58:04,964 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2024-11-28 04:58:04,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 40 states have internal predecessors, (68), 10 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-28 04:58:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2024-11-28 04:58:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-28 04:58:04,965 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:58:04,965 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:58:04,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-11-28 04:58:05,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:58:05,166 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:58:05,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:58:05,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1484300382, now seen corresponding path program 1 times [2024-11-28 04:58:05,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:58:05,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657248787] [2024-11-28 04:58:05,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:58:05,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:58:05,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:58:05,168 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:58:05,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-28 04:58:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:58:05,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 04:58:05,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:58:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-28 04:58:11,597 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:58:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 04:58:27,569 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:58:27,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657248787] [2024-11-28 04:58:27,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657248787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:58:27,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:58:27,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2024-11-28 04:58:27,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564354835] [2024-11-28 04:58:27,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:58:27,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-28 04:58:27,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:58:27,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-28 04:58:27,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2059, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 04:58:27,572 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 48 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 43 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-28 04:58:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:58:54,684 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2024-11-28 04:58:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 04:58:54,685 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 43 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 82 [2024-11-28 04:58:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:58:54,686 INFO L225 Difference]: With dead ends: 111 [2024-11-28 04:58:54,686 INFO L226 Difference]: Without dead ends: 104 [2024-11-28 04:58:54,687 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=424, Invalid=4832, Unknown=0, NotChecked=0, Total=5256 [2024-11-28 04:58:54,687 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 53 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:58:54,687 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1059 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2024-11-28 04:58:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-28 04:58:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2024-11-28 04:58:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 72 states have internal predecessors, (81), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (24), 16 states have call predecessors, (24), 14 states have call successors, (24) [2024-11-28 04:58:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2024-11-28 04:58:54,715 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 82 [2024-11-28 04:58:54,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:58:54,715 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2024-11-28 04:58:54,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 43 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-28 04:58:54,715 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2024-11-28 04:58:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-28 04:58:54,716 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:58:54,716 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:58:54,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-11-28 04:58:54,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:58:54,917 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:58:54,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:58:54,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1141147230, now seen corresponding path program 2 times [2024-11-28 04:58:54,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:58:54,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820814514] [2024-11-28 04:58:54,918 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:58:54,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:58:54,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:58:54,920 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:58:54,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-28 04:58:55,831 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:58:55,831 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:58:55,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 04:58:55,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:59:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-28 04:59:00,703 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:59:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-28 04:59:14,709 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:59:14,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820814514] [2024-11-28 04:59:14,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820814514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:59:14,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:59:14,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2024-11-28 04:59:14,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035198556] [2024-11-28 04:59:14,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:59:14,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 04:59:14,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:59:14,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 04:59:14,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 04:59:14,711 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 45 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 41 states have internal predecessors, (68), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-28 04:59:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:59:36,584 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2024-11-28 04:59:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 04:59:36,586 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 41 states have internal predecessors, (68), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 82 [2024-11-28 04:59:36,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:59:36,587 INFO L225 Difference]: With dead ends: 121 [2024-11-28 04:59:36,587 INFO L226 Difference]: Without dead ends: 111 [2024-11-28 04:59:36,588 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=381, Invalid=4041, Unknown=0, NotChecked=0, Total=4422 [2024-11-28 04:59:36,588 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 41 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:59:36,588 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1146 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2024-11-28 04:59:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-28 04:59:36,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2024-11-28 04:59:36,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 78 states have internal predecessors, (88), 16 states have call successors, (16), 8 states have call predecessors, (16), 9 states have return successors, (24), 16 states have call predecessors, (24), 15 states have call successors, (24) [2024-11-28 04:59:36,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2024-11-28 04:59:36,621 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 82 [2024-11-28 04:59:36,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:59:36,621 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2024-11-28 04:59:36,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 41 states have internal predecessors, (68), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-28 04:59:36,622 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2024-11-28 04:59:36,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 04:59:36,623 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:59:36,623 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:59:36,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2024-11-28 04:59:36,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:59:36,824 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:59:36,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:59:36,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1566170060, now seen corresponding path program 1 times [2024-11-28 04:59:36,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:59:36,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835404342] [2024-11-28 04:59:36,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:59:36,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:59:36,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:59:36,829 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:59:36,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-28 04:59:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:59:37,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:59:37,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:59:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-28 04:59:39,168 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:59:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-28 04:59:44,240 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:59:44,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835404342] [2024-11-28 04:59:44,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835404342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:59:44,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:59:44,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-11-28 04:59:44,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768479298] [2024-11-28 04:59:44,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:59:44,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:59:44,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:59:44,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:59:44,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:59:44,242 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-28 04:59:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:59:49,945 INFO L93 Difference]: Finished difference Result 132 states and 160 transitions. [2024-11-28 04:59:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 04:59:49,947 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 83 [2024-11-28 04:59:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:59:49,953 INFO L225 Difference]: With dead ends: 132 [2024-11-28 04:59:49,953 INFO L226 Difference]: Without dead ends: 99 [2024-11-28 04:59:49,953 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=223, Invalid=1183, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 04:59:49,953 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 31 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:59:49,953 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 969 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-28 04:59:49,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-28 04:59:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2024-11-28 04:59:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 70 states have internal predecessors, (78), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (20), 14 states have call predecessors, (20), 13 states have call successors, (20) [2024-11-28 04:59:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2024-11-28 04:59:49,980 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 83 [2024-11-28 04:59:49,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:59:49,980 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2024-11-28 04:59:49,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-28 04:59:49,980 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2024-11-28 04:59:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 04:59:49,981 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:59:49,981 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:59:49,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-11-28 04:59:50,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:59:50,182 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:59:50,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:59:50,182 INFO L85 PathProgramCache]: Analyzing trace with hash 481643060, now seen corresponding path program 2 times [2024-11-28 04:59:50,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:59:50,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437171624] [2024-11-28 04:59:50,183 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:59:50,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:59:50,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:59:50,185 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:59:50,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-28 04:59:50,461 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:59:50,461 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:59:50,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:59:50,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:59:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-28 04:59:52,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:59:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 04:59:58,706 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:59:58,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437171624] [2024-11-28 04:59:58,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437171624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:59:58,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:59:58,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2024-11-28 04:59:58,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123857983] [2024-11-28 04:59:58,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:59:58,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 04:59:58,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:59:58,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 04:59:58,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:59:58,708 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 33 states, 32 states have (on average 2.15625) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-28 05:00:05,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:00:05,501 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2024-11-28 05:00:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 05:00:05,502 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 83 [2024-11-28 05:00:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:00:05,503 INFO L225 Difference]: With dead ends: 121 [2024-11-28 05:00:05,503 INFO L226 Difference]: Without dead ends: 95 [2024-11-28 05:00:05,504 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=248, Invalid=1644, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 05:00:05,504 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 24 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:00:05,504 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 928 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-28 05:00:05,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-28 05:00:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2024-11-28 05:00:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (18), 13 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-28 05:00:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2024-11-28 05:00:05,532 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 83 [2024-11-28 05:00:05,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:00:05,532 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2024-11-28 05:00:05,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-28 05:00:05,533 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2024-11-28 05:00:05,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-28 05:00:05,533 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:00:05,534 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:00:05,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-11-28 05:00:05,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:05,734 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:00:05,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:00:05,735 INFO L85 PathProgramCache]: Analyzing trace with hash -990234642, now seen corresponding path program 1 times [2024-11-28 05:00:05,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:00:05,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743399942] [2024-11-28 05:00:05,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:00:05,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:05,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:00:05,737 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:00:05,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-11-28 05:00:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:00:06,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-28 05:00:06,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:00:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-28 05:00:12,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:00:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-28 05:00:32,290 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:00:32,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743399942] [2024-11-28 05:00:32,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743399942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:00:32,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:00:32,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2024-11-28 05:00:32,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009403793] [2024-11-28 05:00:32,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:00:32,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-28 05:00:32,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:00:32,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-28 05:00:32,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2362, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 05:00:32,293 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 51 states, 49 states have (on average 1.469387755102041) internal successors, (72), 47 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-28 05:00:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:00:50,660 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2024-11-28 05:00:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-28 05:00:50,662 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.469387755102041) internal successors, (72), 47 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 84 [2024-11-28 05:00:50,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:00:50,662 INFO L225 Difference]: With dead ends: 102 [2024-11-28 05:00:50,662 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 05:00:50,663 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=273, Invalid=3267, Unknown=0, NotChecked=0, Total=3540 [2024-11-28 05:00:50,663 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 32 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:00:50,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1289 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1378 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2024-11-28 05:00:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 05:00:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2024-11-28 05:00:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2024-11-28 05:00:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2024-11-28 05:00:50,722 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 84 [2024-11-28 05:00:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:00:50,723 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2024-11-28 05:00:50,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.469387755102041) internal successors, (72), 47 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-28 05:00:50,723 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2024-11-28 05:00:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-28 05:00:50,724 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:00:50,724 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:00:50,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2024-11-28 05:00:50,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:50,925 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:00:50,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:00:50,926 INFO L85 PathProgramCache]: Analyzing trace with hash -36860878, now seen corresponding path program 2 times [2024-11-28 05:00:50,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:00:50,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054076945] [2024-11-28 05:00:50,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:00:50,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:50,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:00:50,928 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:00:50,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-11-28 05:00:51,750 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:00:51,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:00:51,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-28 05:00:51,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:00:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-28 05:00:58,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 05:01:18,346 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:01:18,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054076945] [2024-11-28 05:01:18,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054076945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:18,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:18,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 55 [2024-11-28 05:01:18,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421349724] [2024-11-28 05:01:18,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:18,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-28 05:01:18,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:01:18,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-28 05:01:18,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2763, Unknown=0, NotChecked=0, Total=2970 [2024-11-28 05:01:18,348 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 55 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 50 states have internal predecessors, (77), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-28 05:01:41,854 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] [2024-11-28 05:01:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:42,539 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2024-11-28 05:01:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 05:01:42,541 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 50 states have internal predecessors, (77), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 84 [2024-11-28 05:01:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:42,541 INFO L225 Difference]: With dead ends: 102 [2024-11-28 05:01:42,541 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 05:01:42,542 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=315, Invalid=4241, Unknown=0, NotChecked=0, Total=4556 [2024-11-28 05:01:42,542 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:42,542 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1331 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1583 Invalid, 1 Unknown, 0 Unchecked, 14.9s Time] [2024-11-28 05:01:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 05:01:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2024-11-28 05:01:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 67 states have internal predecessors, (72), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2024-11-28 05:01:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2024-11-28 05:01:42,576 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 84 [2024-11-28 05:01:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:42,576 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2024-11-28 05:01:42,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 50 states have internal predecessors, (77), 12 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-28 05:01:42,577 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2024-11-28 05:01:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-28 05:01:42,578 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:42,578 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:42,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-11-28 05:01:42,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:42,778 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:01:42,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:42,779 INFO L85 PathProgramCache]: Analyzing trace with hash -197662642, now seen corresponding path program 1 times [2024-11-28 05:01:42,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:01:42,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757609356] [2024-11-28 05:01:42,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:01:42,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:42,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:42,781 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:42,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-28 05:01:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:01:43,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 05:01:43,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-28 05:01:45,600 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 05:01:52,431 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:01:52,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757609356] [2024-11-28 05:01:52,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757609356] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:52,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:52,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2024-11-28 05:01:52,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718318310] [2024-11-28 05:01:52,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:52,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 05:01:52,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:01:52,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 05:01:52,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 05:01:52,435 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 33 states, 32 states have (on average 2.25) internal successors, (72), 33 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-28 05:01:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:59,254 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2024-11-28 05:01:59,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:01:59,256 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.25) internal successors, (72), 33 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) Word has length 85 [2024-11-28 05:01:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:59,257 INFO L225 Difference]: With dead ends: 115 [2024-11-28 05:01:59,257 INFO L226 Difference]: Without dead ends: 73 [2024-11-28 05:01:59,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 05:01:59,258 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 31 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:59,258 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 899 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-28 05:01:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-28 05:01:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-28 05:01:59,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 57 states have internal predecessors, (62), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-28 05:01:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2024-11-28 05:01:59,288 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 85 [2024-11-28 05:01:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:59,290 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2024-11-28 05:01:59,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.25) internal successors, (72), 33 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-28 05:01:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2024-11-28 05:01:59,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-28 05:01:59,291 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:59,291 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:59,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-11-28 05:01:59,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:59,492 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:01:59,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash -707847030, now seen corresponding path program 2 times [2024-11-28 05:01:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:01:59,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013141367] [2024-11-28 05:01:59,492 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:01:59,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:59,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:59,494 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:59,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-11-28 05:01:59,744 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:01:59,744 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:01:59,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 05:01:59,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-28 05:02:01,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-28 05:02:07,309 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:02:07,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013141367] [2024-11-28 05:02:07,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013141367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:07,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:02:07,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2024-11-28 05:02:07,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768100768] [2024-11-28 05:02:07,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:07,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:02:07,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:02:07,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:02:07,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:02:07,311 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-28 05:02:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:12,113 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2024-11-28 05:02:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:02:12,115 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 85 [2024-11-28 05:02:12,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:12,116 INFO L225 Difference]: With dead ends: 91 [2024-11-28 05:02:12,116 INFO L226 Difference]: Without dead ends: 66 [2024-11-28 05:02:12,116 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 05:02:12,117 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 21 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:12,117 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 757 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 05:02:12,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-28 05:02:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2024-11-28 05:02:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 44 states have internal predecessors, (49), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 05:02:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2024-11-28 05:02:12,128 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 85 [2024-11-28 05:02:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:12,128 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2024-11-28 05:02:12,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 11 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-28 05:02:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2024-11-28 05:02:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-28 05:02:12,129 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:12,129 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:12,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2024-11-28 05:02:12,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:12,329 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:12,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:12,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1429199722, now seen corresponding path program 1 times [2024-11-28 05:02:12,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 05:02:12,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085489104] [2024-11-28 05:02:12,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:12,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:12,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:12,332 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:12,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-11-28 05:02:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:12,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-28 05:02:12,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-28 05:02:18,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 05:02:39,155 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 05:02:39,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085489104] [2024-11-28 05:02:39,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085489104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:39,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:02:39,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 49 [2024-11-28 05:02:39,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325599964] [2024-11-28 05:02:39,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:39,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 05:02:39,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 05:02:39,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 05:02:39,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2179, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 05:02:39,157 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 49 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 44 states have internal predecessors, (75), 11 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 12 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-28 05:02:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:51,791 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2024-11-28 05:02:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:02:51,793 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 44 states have internal predecessors, (75), 11 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 12 states have call predecessors, (15), 10 states have call successors, (15) Word has length 86 [2024-11-28 05:02:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:51,794 INFO L225 Difference]: With dead ends: 57 [2024-11-28 05:02:51,794 INFO L226 Difference]: Without dead ends: 0 [2024-11-28 05:02:51,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=282, Invalid=3378, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 05:02:51,794 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:51,795 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 844 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-28 05:02:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-28 05:02:51,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-28 05:02:51,795 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) [2024-11-28 05:02:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-28 05:02:51,795 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2024-11-28 05:02:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:51,796 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-28 05:02:51,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 44 states have internal predecessors, (75), 11 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 12 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-28 05:02:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-28 05:02:51,796 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-28 05:02:51,798 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 05:02:51,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-11-28 05:02:51,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01e58d51-9fb7-47e3-9895-bd7b184fb3d9/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:52,003 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:52,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-28 05:03:00,902 WARN L286 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 384 DAG size of output: 293 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:03:22,851 WARN L286 SmtUtils]: Spent 21.57s on a formula simplification. DAG size of input: 540 DAG size of output: 505 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:03:33,877 WARN L286 SmtUtils]: Spent 11.02s on a formula simplification. DAG size of input: 543 DAG size of output: 492 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:03:41,482 WARN L286 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 294 DAG size of output: 275 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:04:00,224 WARN L286 SmtUtils]: Spent 18.74s on a formula simplification. DAG size of input: 323 DAG size of output: 384 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:04:10,206 WARN L286 SmtUtils]: Spent 9.01s on a formula simplification. DAG size of input: 478 DAG size of output: 433 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:04:15,264 WARN L286 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 538 DAG size of output: 479 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:04:25,069 WARN L286 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 294 DAG size of output: 275 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:04:39,899 WARN L286 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 207 DAG size of output: 233 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-11-28 05:04:52,644 WARN L286 SmtUtils]: Spent 12.32s on a formula simplification. DAG size of input: 477 DAG size of output: 430 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or)