./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC --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 436f0a1b9da8affd8e76edc25dee0cffff5a08ff489ec96067821d6a4548518b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:22:25,169 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:22:25,268 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-24 01:22:25,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:22:25,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:22:25,319 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:22:25,320 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:22:25,321 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:22:25,321 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:22:25,322 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:22:25,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:22:25,323 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:22:25,323 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:22:25,324 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:22:25,324 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:22:25,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:22:25,325 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 01:22:25,325 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 01:22:25,325 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 01:22:25,325 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 01:22:25,325 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:22:25,325 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 01:22:25,325 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:22:25,326 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 01:22:25,326 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 01:22:25,326 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 01:22:25,326 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:22:25,326 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:22:25,326 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:22:25,326 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:22:25,326 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:22:25,327 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:22:25,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:22:25,328 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:22:25,328 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:22:25,328 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:22:25,328 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:22:25,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:22:25,328 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:22:25,328 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:22:25,328 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 01:22:25,328 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 01:22:25,328 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 01:22:25,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 01:22:25,329 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:22:25,329 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:22:25,329 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:22:25,329 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:22:25,329 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_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC 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 -> 436f0a1b9da8affd8e76edc25dee0cffff5a08ff489ec96067821d6a4548518b [2024-11-24 01:22:25,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:22:25,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:22:25,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:22:25,659 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:22:25,659 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:22:25,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2024-11-24 01:22:28,620 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/data/e977575a7/844ecf4ed5964b8a825d1a55e010ce96/FLAG549997f32 [2024-11-24 01:22:28,915 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:22:28,919 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2024-11-24 01:22:28,939 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/data/e977575a7/844ecf4ed5964b8a825d1a55e010ce96/FLAG549997f32 [2024-11-24 01:22:28,987 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/data/e977575a7/844ecf4ed5964b8a825d1a55e010ce96 [2024-11-24 01:22:28,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:22:28,991 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:22:28,993 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:22:28,993 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:22:28,998 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:22:28,999 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:22:28" (1/1) ... [2024-11-24 01:22:29,002 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f4f864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29, skipping insertion in model container [2024-11-24 01:22:29,002 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:22:28" (1/1) ... [2024-11-24 01:22:29,019 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:22:29,189 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_ed174c91-f962-4d29-ba2a-a13054849693/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2024-11-24 01:22:29,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:22:29,235 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:22:29,247 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_ed174c91-f962-4d29-ba2a-a13054849693/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2024-11-24 01:22:29,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:22:29,281 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:22:29,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29 WrapperNode [2024-11-24 01:22:29,284 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:22:29,285 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:22:29,285 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:22:29,285 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:22:29,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,325 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2024-11-24 01:22:29,326 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:22:29,326 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:22:29,326 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:22:29,326 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:22:29,334 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,336 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,346 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]. [2024-11-24 01:22:29,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,347 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,350 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,351 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,357 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,358 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,359 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,361 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:22:29,361 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:22:29,362 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:22:29,362 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:22:29,363 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (1/1) ... [2024-11-24 01:22:29,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:22:29,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:29,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:22:29,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:22:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:22:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-24 01:22:29,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-24 01:22:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 01:22:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:22:29,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:22:29,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-24 01:22:29,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-24 01:22:29,481 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:22:29,484 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:22:29,680 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-24 01:22:29,681 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:22:29,697 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:22:29,698 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-24 01:22:29,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:22:29 BoogieIcfgContainer [2024-11-24 01:22:29,699 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:22:29,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:22:29,702 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:22:29,709 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:22:29,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:22:28" (1/3) ... [2024-11-24 01:22:29,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2111d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:22:29, skipping insertion in model container [2024-11-24 01:22:29,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:22:29" (2/3) ... [2024-11-24 01:22:29,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2111d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:22:29, skipping insertion in model container [2024-11-24 01:22:29,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:22:29" (3/3) ... [2024-11-24 01:22:29,713 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.c [2024-11-24 01:22:29,730 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:22:29,731 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_unwindbound50.c that has 3 procedures, 35 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-24 01:22:29,799 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:22:29,811 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;@1e2d7c9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:22:29,812 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-24 01:22:29,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-24 01:22:29,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-24 01:22:29,822 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:29,823 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:22:29,823 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:29,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:29,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2024-11-24 01:22:29,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:29,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310166889] [2024-11-24 01:22:29,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:29,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:22:29,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:29,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310166889] [2024-11-24 01:22:29,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310166889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:22:29,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481812309] [2024-11-24 01:22:29,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:29,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:29,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:29,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:29,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:22:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:30,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-24 01:22:30,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:22:30,091 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:22:30,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481812309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:22:30,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:22:30,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-24 01:22:30,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064324105] [2024-11-24 01:22:30,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:22:30,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-24 01:22:30,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:30,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-24 01:22:30,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-24 01:22:30,120 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 01:22:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:30,142 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2024-11-24 01:22:30,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-24 01:22:30,146 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-11-24 01:22:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:30,153 INFO L225 Difference]: With dead ends: 67 [2024-11-24 01:22:30,153 INFO L226 Difference]: Without dead ends: 31 [2024-11-24 01:22:30,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-24 01:22:30,162 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:30,163 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:22:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-24 01:22:30,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-24 01:22:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 01:22:30,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-11-24 01:22:30,208 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2024-11-24 01:22:30,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:30,208 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-11-24 01:22:30,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 01:22:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-11-24 01:22:30,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-24 01:22:30,210 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:30,211 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:22:30,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-24 01:22:30,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-24 01:22:30,412 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:30,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:30,413 INFO L85 PathProgramCache]: Analyzing trace with hash 986042158, now seen corresponding path program 1 times [2024-11-24 01:22:30,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:30,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080232469] [2024-11-24 01:22:30,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:30,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:30,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080232469] [2024-11-24 01:22:30,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080232469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:22:30,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:22:30,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:22:30,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557082545] [2024-11-24 01:22:30,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:22:30,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:22:30,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:30,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:22:30,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:22:30,533 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:30,564 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-11-24 01:22:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:22:30,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-11-24 01:22:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:30,565 INFO L225 Difference]: With dead ends: 40 [2024-11-24 01:22:30,566 INFO L226 Difference]: Without dead ends: 33 [2024-11-24 01:22:30,566 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:22:30,567 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:30,567 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:22:30,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-24 01:22:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-24 01:22:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 01:22:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-11-24 01:22:30,575 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2024-11-24 01:22:30,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:30,577 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-11-24 01:22:30,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-11-24 01:22:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-24 01:22:30,578 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:30,578 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:22:30,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 01:22:30,579 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:30,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:30,579 INFO L85 PathProgramCache]: Analyzing trace with hash 368384092, now seen corresponding path program 1 times [2024-11-24 01:22:30,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:30,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215938674] [2024-11-24 01:22:30,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:30,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:22:30,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:30,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215938674] [2024-11-24 01:22:30,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215938674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:22:30,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:22:30,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 01:22:30,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906997224] [2024-11-24 01:22:30,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:22:30,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 01:22:30,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:30,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 01:22:30,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:22:30,934 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:31,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:31,078 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2024-11-24 01:22:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:22:31,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-24 01:22:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:31,080 INFO L225 Difference]: With dead ends: 53 [2024-11-24 01:22:31,081 INFO L226 Difference]: Without dead ends: 46 [2024-11-24 01:22:31,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:22:31,082 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 42 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:31,084 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 119 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:22:31,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-24 01:22:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2024-11-24 01:22:31,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 01:22:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2024-11-24 01:22:31,101 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2024-11-24 01:22:31,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:31,101 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2024-11-24 01:22:31,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2024-11-24 01:22:31,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-24 01:22:31,102 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:31,102 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:22:31,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-24 01:22:31,103 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:31,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:31,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1914665021, now seen corresponding path program 1 times [2024-11-24 01:22:31,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:31,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440181245] [2024-11-24 01:22:31,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:31,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 01:22:31,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682251888] [2024-11-24 01:22:31,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:31,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:31,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:31,129 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:31,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:22:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:31,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:22:31,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:31,387 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:22:31,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440181245] [2024-11-24 01:22:31,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:22:31,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682251888] [2024-11-24 01:22:31,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682251888] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:22:31,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:22:31,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:22:31,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482345411] [2024-11-24 01:22:31,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:22:31,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:22:31,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:31,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:22:31,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:22:31,393 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:31,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:31,476 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2024-11-24 01:22:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:22:31,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-24 01:22:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:31,479 INFO L225 Difference]: With dead ends: 52 [2024-11-24 01:22:31,479 INFO L226 Difference]: Without dead ends: 50 [2024-11-24 01:22:31,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:22:31,480 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:31,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:22:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-24 01:22:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-11-24 01:22:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-24 01:22:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2024-11-24 01:22:31,502 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 25 [2024-11-24 01:22:31,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:31,503 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2024-11-24 01:22:31,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:31,503 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2024-11-24 01:22:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-24 01:22:31,504 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:31,504 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:22:31,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-24 01:22:31,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:31,705 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:31,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:31,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1120743530, now seen corresponding path program 1 times [2024-11-24 01:22:31,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:31,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74401978] [2024-11-24 01:22:31,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:31,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:31,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:31,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74401978] [2024-11-24 01:22:31,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74401978] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:22:31,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:22:31,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:22:31,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537818796] [2024-11-24 01:22:31,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:22:31,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:22:31,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:31,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:22:31,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:22:31,864 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:31,905 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2024-11-24 01:22:31,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:22:31,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-24 01:22:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:31,909 INFO L225 Difference]: With dead ends: 73 [2024-11-24 01:22:31,909 INFO L226 Difference]: Without dead ends: 51 [2024-11-24 01:22:31,909 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:22:31,910 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:31,910 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:22:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-24 01:22:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-24 01:22:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-24 01:22:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2024-11-24 01:22:31,951 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2024-11-24 01:22:31,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:31,951 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2024-11-24 01:22:31,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2024-11-24 01:22:31,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-24 01:22:31,952 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:31,952 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:22:31,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-24 01:22:31,952 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:31,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:31,953 INFO L85 PathProgramCache]: Analyzing trace with hash -495940029, now seen corresponding path program 1 times [2024-11-24 01:22:31,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:31,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126574250] [2024-11-24 01:22:31,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:31,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:32,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:32,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126574250] [2024-11-24 01:22:32,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126574250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:22:32,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48323350] [2024-11-24 01:22:32,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:32,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:32,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:32,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:32,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:22:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:32,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 01:22:32,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:32,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:22:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:32,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48323350] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:22:32,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:22:32,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-24 01:22:32,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624861096] [2024-11-24 01:22:32,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:22:32,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:22:32,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:32,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:22:32,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-24 01:22:32,352 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-24 01:22:32,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:32,586 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2024-11-24 01:22:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 01:22:32,587 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2024-11-24 01:22:32,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:32,588 INFO L225 Difference]: With dead ends: 147 [2024-11-24 01:22:32,589 INFO L226 Difference]: Without dead ends: 140 [2024-11-24 01:22:32,590 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-24 01:22:32,591 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 72 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:32,593 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 234 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:22:32,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-24 01:22:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2024-11-24 01:22:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-24 01:22:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2024-11-24 01:22:32,630 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2024-11-24 01:22:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:32,630 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2024-11-24 01:22:32,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-24 01:22:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2024-11-24 01:22:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-24 01:22:32,631 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:32,631 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:22:32,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 01:22:32,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:32,832 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:32,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:32,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1671576551, now seen corresponding path program 1 times [2024-11-24 01:22:32,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:32,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458377453] [2024-11-24 01:22:32,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:32,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:22:32,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:32,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458377453] [2024-11-24 01:22:32,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458377453] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:22:32,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177308336] [2024-11-24 01:22:32,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:32,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:32,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:32,980 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:32,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:22:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:33,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:22:33,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:22:33,105 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:22:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:22:33,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177308336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:22:33,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:22:33,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-24 01:22:33,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496091999] [2024-11-24 01:22:33,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:22:33,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 01:22:33,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:33,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 01:22:33,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-24 01:22:33,221 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 01:22:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:33,512 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2024-11-24 01:22:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 01:22:33,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-24 01:22:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:33,514 INFO L225 Difference]: With dead ends: 183 [2024-11-24 01:22:33,514 INFO L226 Difference]: Without dead ends: 171 [2024-11-24 01:22:33,515 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:22:33,515 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 113 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:33,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 293 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:22:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-24 01:22:33,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2024-11-24 01:22:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-24 01:22:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2024-11-24 01:22:33,550 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2024-11-24 01:22:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:33,551 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2024-11-24 01:22:33,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 01:22:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2024-11-24 01:22:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-24 01:22:33,552 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:33,552 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-24 01:22:33,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-24 01:22:33,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-24 01:22:33,753 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:33,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:33,753 INFO L85 PathProgramCache]: Analyzing trace with hash -544486195, now seen corresponding path program 1 times [2024-11-24 01:22:33,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:33,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139282583] [2024-11-24 01:22:33,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:33,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 01:22:33,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556436862] [2024-11-24 01:22:33,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:33,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:33,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:33,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:33,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:22:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:33,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:22:33,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:33,985 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:22:33,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:33,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139282583] [2024-11-24 01:22:33,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:22:33,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556436862] [2024-11-24 01:22:33,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556436862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:22:33,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:22:33,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:22:33,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112116905] [2024-11-24 01:22:33,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:22:33,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:22:33,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:33,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:22:33,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:22:33,987 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-24 01:22:34,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:34,067 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2024-11-24 01:22:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:22:34,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-24 01:22:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:34,069 INFO L225 Difference]: With dead ends: 143 [2024-11-24 01:22:34,069 INFO L226 Difference]: Without dead ends: 141 [2024-11-24 01:22:34,070 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:22:34,071 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:34,071 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:22:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-24 01:22:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2024-11-24 01:22:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-24 01:22:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2024-11-24 01:22:34,119 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2024-11-24 01:22:34,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:34,119 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2024-11-24 01:22:34,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-24 01:22:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2024-11-24 01:22:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-24 01:22:34,121 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:34,121 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:22:34,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-24 01:22:34,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:34,321 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:34,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:34,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1797448472, now seen corresponding path program 1 times [2024-11-24 01:22:34,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:34,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805981335] [2024-11-24 01:22:34,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:34,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 01:22:34,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933071758] [2024-11-24 01:22:34,348 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:34,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:34,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:34,355 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:34,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:22:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:34,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 01:22:34,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:34,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:22:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:34,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805981335] [2024-11-24 01:22:34,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:22:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933071758] [2024-11-24 01:22:34,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933071758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:22:34,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:22:34,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-24 01:22:34,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928624302] [2024-11-24 01:22:34,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:22:34,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 01:22:34,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:34,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 01:22:34,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-24 01:22:34,817 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:34,997 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2024-11-24 01:22:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:22:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-24 01:22:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:35,002 INFO L225 Difference]: With dead ends: 175 [2024-11-24 01:22:35,002 INFO L226 Difference]: Without dead ends: 173 [2024-11-24 01:22:35,003 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-24 01:22:35,003 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 27 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:35,004 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 264 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:22:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-24 01:22:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2024-11-24 01:22:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-24 01:22:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2024-11-24 01:22:35,046 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2024-11-24 01:22:35,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:35,046 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2024-11-24 01:22:35,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2024-11-24 01:22:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-24 01:22:35,048 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:35,048 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-24 01:22:35,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-24 01:22:35,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-24 01:22:35,249 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:35,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:35,249 INFO L85 PathProgramCache]: Analyzing trace with hash -352567575, now seen corresponding path program 1 times [2024-11-24 01:22:35,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:35,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131901329] [2024-11-24 01:22:35,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:35,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:35,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:35,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131901329] [2024-11-24 01:22:35,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131901329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:22:35,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:22:35,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 01:22:35,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255412907] [2024-11-24 01:22:35,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:22:35,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 01:22:35,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:35,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 01:22:35,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:22:35,343 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:35,392 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2024-11-24 01:22:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:22:35,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-24 01:22:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:35,394 INFO L225 Difference]: With dead ends: 237 [2024-11-24 01:22:35,394 INFO L226 Difference]: Without dead ends: 170 [2024-11-24 01:22:35,395 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:22:35,395 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:35,395 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:22:35,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-24 01:22:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-11-24 01:22:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-24 01:22:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2024-11-24 01:22:35,427 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2024-11-24 01:22:35,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:35,428 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2024-11-24 01:22:35,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2024-11-24 01:22:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-24 01:22:35,429 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:35,429 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-24 01:22:35,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-24 01:22:35,429 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:35,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1336855101, now seen corresponding path program 1 times [2024-11-24 01:22:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:35,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538259573] [2024-11-24 01:22:35,430 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:35,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 01:22:35,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813209439] [2024-11-24 01:22:35,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:35,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:35,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:35,460 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:35,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:22:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:35,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 01:22:35,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 01:22:35,605 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:22:35,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:35,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538259573] [2024-11-24 01:22:35,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:22:35,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813209439] [2024-11-24 01:22:35,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813209439] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:22:35,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:22:35,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:22:35,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018396301] [2024-11-24 01:22:35,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:22:35,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:22:35,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:35,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:22:35,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:22:35,608 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-24 01:22:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:35,724 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2024-11-24 01:22:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:22:35,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-11-24 01:22:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:35,727 INFO L225 Difference]: With dead ends: 235 [2024-11-24 01:22:35,727 INFO L226 Difference]: Without dead ends: 233 [2024-11-24 01:22:35,729 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:22:35,730 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:35,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:22:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-11-24 01:22:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2024-11-24 01:22:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-24 01:22:35,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2024-11-24 01:22:35,772 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2024-11-24 01:22:35,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:35,772 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2024-11-24 01:22:35,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-24 01:22:35,773 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2024-11-24 01:22:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-24 01:22:35,775 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:35,775 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-24 01:22:35,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-24 01:22:35,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-24 01:22:35,976 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:35,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:35,977 INFO L85 PathProgramCache]: Analyzing trace with hash -711573864, now seen corresponding path program 1 times [2024-11-24 01:22:35,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:35,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119427607] [2024-11-24 01:22:35,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:35,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 01:22:35,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183965800] [2024-11-24 01:22:35,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:35,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:35,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:35,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:35,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 01:22:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:36,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-24 01:22:36,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:22:36,398 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:22:36,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:36,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119427607] [2024-11-24 01:22:36,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:22:36,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183965800] [2024-11-24 01:22:36,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183965800] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:22:36,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:22:36,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-11-24 01:22:36,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725843390] [2024-11-24 01:22:36,465 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-24 01:22:36,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:22:36,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:36,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:22:36,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-24 01:22:36,466 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-24 01:22:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:36,735 INFO L93 Difference]: Finished difference Result 238 states and 330 transitions. [2024-11-24 01:22:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:22:36,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2024-11-24 01:22:36,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:36,738 INFO L225 Difference]: With dead ends: 238 [2024-11-24 01:22:36,738 INFO L226 Difference]: Without dead ends: 236 [2024-11-24 01:22:36,739 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:22:36,739 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 68 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:36,739 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 264 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:22:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-24 01:22:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2024-11-24 01:22:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 166 states have (on average 1.355421686746988) internal successors, (225), 167 states have internal predecessors, (225), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-24 01:22:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2024-11-24 01:22:36,771 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 37 [2024-11-24 01:22:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:36,771 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2024-11-24 01:22:36,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-24 01:22:36,771 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2024-11-24 01:22:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-24 01:22:36,772 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:36,772 INFO L218 NwaCegarLoop]: trace histogram [4, 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] [2024-11-24 01:22:36,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 01:22:36,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-24 01:22:36,977 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:36,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:36,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1366159795, now seen corresponding path program 1 times [2024-11-24 01:22:36,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:36,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514488260] [2024-11-24 01:22:36,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:36,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 01:22:36,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055994099] [2024-11-24 01:22:36,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:36,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:36,993 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:36,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 01:22:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:37,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 01:22:37,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-24 01:22:37,099 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:22:37,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:37,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514488260] [2024-11-24 01:22:37,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:22:37,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055994099] [2024-11-24 01:22:37,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055994099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:22:37,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:22:37,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:22:37,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312527265] [2024-11-24 01:22:37,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:22:37,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:22:37,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:37,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:22:37,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:22:37,101 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-24 01:22:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:37,196 INFO L93 Difference]: Finished difference Result 309 states and 454 transitions. [2024-11-24 01:22:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:22:37,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2024-11-24 01:22:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:37,199 INFO L225 Difference]: With dead ends: 309 [2024-11-24 01:22:37,200 INFO L226 Difference]: Without dead ends: 307 [2024-11-24 01:22:37,201 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:22:37,202 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:37,202 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 136 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:22:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2024-11-24 01:22:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 292. [2024-11-24 01:22:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 187 states have (on average 1.358288770053476) internal successors, (254), 197 states have internal predecessors, (254), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2024-11-24 01:22:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 427 transitions. [2024-11-24 01:22:37,264 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 427 transitions. Word has length 40 [2024-11-24 01:22:37,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:37,264 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 427 transitions. [2024-11-24 01:22:37,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-24 01:22:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 427 transitions. [2024-11-24 01:22:37,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-24 01:22:37,266 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:37,266 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:22:37,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-24 01:22:37,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:37,471 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:37,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:37,471 INFO L85 PathProgramCache]: Analyzing trace with hash 493677206, now seen corresponding path program 1 times [2024-11-24 01:22:37,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:37,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686809779] [2024-11-24 01:22:37,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:37,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:37,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:37,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686809779] [2024-11-24 01:22:37,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686809779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:22:37,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127535225] [2024-11-24 01:22:37,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:37,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:37,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:37,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:37,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 01:22:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:37,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-24 01:22:37,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:37,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:22:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:37,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127535225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:22:37,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:22:37,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-24 01:22:37,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459842337] [2024-11-24 01:22:37,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:22:37,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-24 01:22:37,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:37,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-24 01:22:37,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:22:37,845 INFO L87 Difference]: Start difference. First operand 292 states and 427 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-24 01:22:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:38,309 INFO L93 Difference]: Finished difference Result 1094 states and 1585 transitions. [2024-11-24 01:22:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-24 01:22:38,310 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-11-24 01:22:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:38,322 INFO L225 Difference]: With dead ends: 1094 [2024-11-24 01:22:38,322 INFO L226 Difference]: Without dead ends: 897 [2024-11-24 01:22:38,324 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2024-11-24 01:22:38,325 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 195 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:38,327 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 263 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:22:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2024-11-24 01:22:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 858. [2024-11-24 01:22:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 568 states have (on average 1.2922535211267605) internal successors, (734), 591 states have internal predecessors, (734), 232 states have call successors, (232), 57 states have call predecessors, (232), 57 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2024-11-24 01:22:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1192 transitions. [2024-11-24 01:22:38,501 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1192 transitions. Word has length 38 [2024-11-24 01:22:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:38,502 INFO L471 AbstractCegarLoop]: Abstraction has 858 states and 1192 transitions. [2024-11-24 01:22:38,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-24 01:22:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1192 transitions. [2024-11-24 01:22:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-24 01:22:38,504 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:38,504 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] [2024-11-24 01:22:38,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 01:22:38,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-24 01:22:38,705 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:38,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:38,705 INFO L85 PathProgramCache]: Analyzing trace with hash 324624832, now seen corresponding path program 1 times [2024-11-24 01:22:38,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:38,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404091856] [2024-11-24 01:22:38,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:38,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:38,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:38,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404091856] [2024-11-24 01:22:38,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404091856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:22:38,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144141170] [2024-11-24 01:22:38,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:38,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:38,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:38,805 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:38,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 01:22:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:38,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:22:38,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:38,932 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:22:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:39,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144141170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:22:39,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:22:39,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-11-24 01:22:39,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149258884] [2024-11-24 01:22:39,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:22:39,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 01:22:39,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:39,027 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 01:22:39,027 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-11-24 01:22:39,027 INFO L87 Difference]: Start difference. First operand 858 states and 1192 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-24 01:22:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:39,365 INFO L93 Difference]: Finished difference Result 1267 states and 1779 transitions. [2024-11-24 01:22:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 01:22:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-11-24 01:22:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:39,372 INFO L225 Difference]: With dead ends: 1267 [2024-11-24 01:22:39,372 INFO L226 Difference]: Without dead ends: 863 [2024-11-24 01:22:39,374 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:22:39,375 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 117 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:39,375 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 236 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 01:22:39,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2024-11-24 01:22:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 855. [2024-11-24 01:22:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 565 states have (on average 1.2601769911504426) internal successors, (712), 588 states have internal predecessors, (712), 232 states have call successors, (232), 57 states have call predecessors, (232), 57 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2024-11-24 01:22:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1170 transitions. [2024-11-24 01:22:39,516 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1170 transitions. Word has length 38 [2024-11-24 01:22:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:39,516 INFO L471 AbstractCegarLoop]: Abstraction has 855 states and 1170 transitions. [2024-11-24 01:22:39,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-24 01:22:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1170 transitions. [2024-11-24 01:22:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-24 01:22:39,517 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:39,517 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:22:39,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-24 01:22:39,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-24 01:22:39,722 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:39,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:39,722 INFO L85 PathProgramCache]: Analyzing trace with hash 139988515, now seen corresponding path program 2 times [2024-11-24 01:22:39,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:39,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319819342] [2024-11-24 01:22:39,723 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:22:39,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:39,736 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:22:39,737 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:22:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 01:22:39,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319819342] [2024-11-24 01:22:39,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319819342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:22:39,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:22:39,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:22:39,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487782871] [2024-11-24 01:22:39,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:22:39,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:22:39,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:39,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:22:39,793 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:22:39,793 INFO L87 Difference]: Start difference. First operand 855 states and 1170 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:40,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:40,027 INFO L93 Difference]: Finished difference Result 1147 states and 1612 transitions. [2024-11-24 01:22:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:22:40,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-11-24 01:22:40,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:40,035 INFO L225 Difference]: With dead ends: 1147 [2024-11-24 01:22:40,035 INFO L226 Difference]: Without dead ends: 911 [2024-11-24 01:22:40,037 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-24 01:22:40,038 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 30 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:40,039 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 181 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:22:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2024-11-24 01:22:40,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 803. [2024-11-24 01:22:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 533 states have (on average 1.24953095684803) internal successors, (666), 555 states have internal predecessors, (666), 212 states have call successors, (212), 57 states have call predecessors, (212), 57 states have return successors, (206), 190 states have call predecessors, (206), 206 states have call successors, (206) [2024-11-24 01:22:40,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1084 transitions. [2024-11-24 01:22:40,185 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1084 transitions. Word has length 39 [2024-11-24 01:22:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:40,185 INFO L471 AbstractCegarLoop]: Abstraction has 803 states and 1084 transitions. [2024-11-24 01:22:40,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 01:22:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1084 transitions. [2024-11-24 01:22:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-24 01:22:40,186 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:40,187 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2024-11-24 01:22:40,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-24 01:22:40,187 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:40,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:40,187 INFO L85 PathProgramCache]: Analyzing trace with hash 883594140, now seen corresponding path program 1 times [2024-11-24 01:22:40,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:40,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314909910] [2024-11-24 01:22:40,188 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:40,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 01:22:40,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586767266] [2024-11-24 01:22:40,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:40,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:40,223 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:40,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 01:22:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:40,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-24 01:22:40,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:22:41,178 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:22:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 01:22:41,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:41,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314909910] [2024-11-24 01:22:41,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:22:41,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586767266] [2024-11-24 01:22:41,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586767266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:22:41,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:22:41,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-24 01:22:41,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669717044] [2024-11-24 01:22:41,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:22:41,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-24 01:22:41,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:41,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-24 01:22:41,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-24 01:22:41,885 INFO L87 Difference]: Start difference. First operand 803 states and 1084 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-24 01:22:46,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:46,445 INFO L93 Difference]: Finished difference Result 1218 states and 1723 transitions. [2024-11-24 01:22:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-24 01:22:46,446 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 54 [2024-11-24 01:22:46,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:46,455 INFO L225 Difference]: With dead ends: 1218 [2024-11-24 01:22:46,455 INFO L226 Difference]: Without dead ends: 1196 [2024-11-24 01:22:46,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-11-24 01:22:46,457 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 336 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:46,458 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1127 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-24 01:22:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2024-11-24 01:22:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 885. [2024-11-24 01:22:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 592 states have (on average 1.2533783783783783) internal successors, (742), 612 states have internal predecessors, (742), 231 states have call successors, (231), 61 states have call predecessors, (231), 61 states have return successors, (226), 211 states have call predecessors, (226), 226 states have call successors, (226) [2024-11-24 01:22:46,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1199 transitions. [2024-11-24 01:22:46,758 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1199 transitions. Word has length 54 [2024-11-24 01:22:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:46,759 INFO L471 AbstractCegarLoop]: Abstraction has 885 states and 1199 transitions. [2024-11-24 01:22:46,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-24 01:22:46,759 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1199 transitions. [2024-11-24 01:22:46,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-24 01:22:46,760 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:46,760 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2024-11-24 01:22:46,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-24 01:22:46,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-24 01:22:46,961 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:46,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash -506026557, now seen corresponding path program 1 times [2024-11-24 01:22:46,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:46,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632465810] [2024-11-24 01:22:46,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:46,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 01:22:47,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:47,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632465810] [2024-11-24 01:22:47,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632465810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:22:47,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482008943] [2024-11-24 01:22:47,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:47,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:47,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:47,217 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:47,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 01:22:47,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:47,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 01:22:47,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 01:22:47,378 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:22:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 01:22:47,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482008943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:22:47,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:22:47,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2024-11-24 01:22:47,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825374338] [2024-11-24 01:22:47,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:22:47,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-24 01:22:47,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:47,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-24 01:22:47,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2024-11-24 01:22:47,582 INFO L87 Difference]: Start difference. First operand 885 states and 1199 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-24 01:22:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:48,643 INFO L93 Difference]: Finished difference Result 1906 states and 2713 transitions. [2024-11-24 01:22:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-24 01:22:48,643 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 60 [2024-11-24 01:22:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:48,657 INFO L225 Difference]: With dead ends: 1906 [2024-11-24 01:22:48,657 INFO L226 Difference]: Without dead ends: 1884 [2024-11-24 01:22:48,659 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2024-11-24 01:22:48,659 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 300 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:48,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 342 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 01:22:48,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2024-11-24 01:22:49,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1790. [2024-11-24 01:22:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1181 states have (on average 1.2921253175275191) internal successors, (1526), 1241 states have internal predecessors, (1526), 511 states have call successors, (511), 97 states have call predecessors, (511), 97 states have return successors, (502), 451 states have call predecessors, (502), 502 states have call successors, (502) [2024-11-24 01:22:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2539 transitions. [2024-11-24 01:22:49,319 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2539 transitions. Word has length 60 [2024-11-24 01:22:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:49,320 INFO L471 AbstractCegarLoop]: Abstraction has 1790 states and 2539 transitions. [2024-11-24 01:22:49,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-24 01:22:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2539 transitions. [2024-11-24 01:22:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-24 01:22:49,321 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:49,322 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 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] [2024-11-24 01:22:49,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-24 01:22:49,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-24 01:22:49,523 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:49,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash 259328120, now seen corresponding path program 1 times [2024-11-24 01:22:49,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:49,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672116658] [2024-11-24 01:22:49,524 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:49,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-24 01:22:49,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:49,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672116658] [2024-11-24 01:22:49,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672116658] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:22:49,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:22:49,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:22:49,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765632555] [2024-11-24 01:22:49,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:22:49,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:22:49,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:49,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:22:49,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:22:49,607 INFO L87 Difference]: Start difference. First operand 1790 states and 2539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-24 01:22:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:50,065 INFO L93 Difference]: Finished difference Result 3149 states and 4464 transitions. [2024-11-24 01:22:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:22:50,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2024-11-24 01:22:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:50,077 INFO L225 Difference]: With dead ends: 3149 [2024-11-24 01:22:50,077 INFO L226 Difference]: Without dead ends: 1884 [2024-11-24 01:22:50,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:22:50,083 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:50,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 131 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 01:22:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2024-11-24 01:22:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1811. [2024-11-24 01:22:50,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1242 states have (on average 1.2954911433172303) internal successors, (1609), 1271 states have internal predecessors, (1609), 471 states have call successors, (471), 97 states have call predecessors, (471), 97 states have return successors, (462), 442 states have call predecessors, (462), 462 states have call successors, (462) [2024-11-24 01:22:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2542 transitions. [2024-11-24 01:22:50,661 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2542 transitions. Word has length 62 [2024-11-24 01:22:50,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:50,661 INFO L471 AbstractCegarLoop]: Abstraction has 1811 states and 2542 transitions. [2024-11-24 01:22:50,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-24 01:22:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2542 transitions. [2024-11-24 01:22:50,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-24 01:22:50,662 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:50,662 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 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] [2024-11-24 01:22:50,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-24 01:22:50,663 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:50,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash 71362364, now seen corresponding path program 1 times [2024-11-24 01:22:50,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:50,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199026633] [2024-11-24 01:22:50,663 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:50,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 01:22:50,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932162897] [2024-11-24 01:22:50,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:50,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:50,684 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:50,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-24 01:22:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:50,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-24 01:22:50,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-24 01:22:50,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:22:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-24 01:22:50,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:50,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199026633] [2024-11-24 01:22:50,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:22:50,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932162897] [2024-11-24 01:22:50,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932162897] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:22:50,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:22:50,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-24 01:22:50,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974480765] [2024-11-24 01:22:50,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:22:50,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:22:50,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:50,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:22:50,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-24 01:22:50,949 INFO L87 Difference]: Start difference. First operand 1811 states and 2542 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-24 01:22:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:51,682 INFO L93 Difference]: Finished difference Result 1849 states and 2579 transitions. [2024-11-24 01:22:51,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:22:51,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2024-11-24 01:22:51,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:51,699 INFO L225 Difference]: With dead ends: 1849 [2024-11-24 01:22:51,700 INFO L226 Difference]: Without dead ends: 1847 [2024-11-24 01:22:51,702 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-24 01:22:51,702 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:51,704 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 129 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 01:22:51,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2024-11-24 01:22:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1847. [2024-11-24 01:22:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1269 states have (on average 1.2876280535855005) internal successors, (1634), 1298 states have internal predecessors, (1634), 471 states have call successors, (471), 106 states have call predecessors, (471), 106 states have return successors, (462), 442 states have call predecessors, (462), 462 states have call successors, (462) [2024-11-24 01:22:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2567 transitions. [2024-11-24 01:22:52,331 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2567 transitions. Word has length 63 [2024-11-24 01:22:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:22:52,331 INFO L471 AbstractCegarLoop]: Abstraction has 1847 states and 2567 transitions. [2024-11-24 01:22:52,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-24 01:22:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2567 transitions. [2024-11-24 01:22:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-24 01:22:52,335 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:22:52,335 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2024-11-24 01:22:52,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-24 01:22:52,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:52,538 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:22:52,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:22:52,539 INFO L85 PathProgramCache]: Analyzing trace with hash -82823155, now seen corresponding path program 1 times [2024-11-24 01:22:52,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:22:52,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51193350] [2024-11-24 01:22:52,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:52,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:22:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 01:22:52,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232755625] [2024-11-24 01:22:52,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:22:52,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:22:52,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:22:52,593 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:22:52,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 01:22:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:22:52,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-24 01:22:52,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:22:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-24 01:22:53,506 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:22:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-24 01:22:54,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:22:54,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51193350] [2024-11-24 01:22:54,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:22:54,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232755625] [2024-11-24 01:22:54,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232755625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:22:54,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:22:54,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-24 01:22:54,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864837493] [2024-11-24 01:22:54,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:22:54,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-24 01:22:54,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:22:54,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-24 01:22:54,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-24 01:22:54,132 INFO L87 Difference]: Start difference. First operand 1847 states and 2567 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-24 01:22:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:22:59,807 INFO L93 Difference]: Finished difference Result 2449 states and 3458 transitions. [2024-11-24 01:22:59,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-24 01:22:59,808 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 64 [2024-11-24 01:22:59,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:22:59,818 INFO L225 Difference]: With dead ends: 2449 [2024-11-24 01:22:59,818 INFO L226 Difference]: Without dead ends: 2447 [2024-11-24 01:22:59,820 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-11-24 01:22:59,821 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 235 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-24 01:22:59,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 677 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-24 01:22:59,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2024-11-24 01:23:00,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2317. [2024-11-24 01:23:00,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1611 states have (on average 1.309124767225326) internal successors, (2109), 1648 states have internal predecessors, (2109), 591 states have call successors, (591), 114 states have call predecessors, (591), 114 states have return successors, (582), 554 states have call predecessors, (582), 582 states have call successors, (582) [2024-11-24 01:23:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3282 transitions. [2024-11-24 01:23:00,727 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3282 transitions. Word has length 64 [2024-11-24 01:23:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:23:00,727 INFO L471 AbstractCegarLoop]: Abstraction has 2317 states and 3282 transitions. [2024-11-24 01:23:00,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-24 01:23:00,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3282 transitions. [2024-11-24 01:23:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-24 01:23:00,730 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:23:00,730 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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] [2024-11-24 01:23:00,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-24 01:23:00,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:23:00,935 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:23:00,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:23:00,936 INFO L85 PathProgramCache]: Analyzing trace with hash -394700136, now seen corresponding path program 2 times [2024-11-24 01:23:00,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:23:00,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212029378] [2024-11-24 01:23:00,936 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:23:00,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:23:00,967 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:23:00,968 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-24 01:23:00,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342711862] [2024-11-24 01:23:00,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:23:00,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:23:00,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:23:00,975 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:23:00,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-24 01:23:01,043 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:23:01,043 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:23:01,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-24 01:23:01,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:23:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:23:01,851 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:23:02,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:23:02,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212029378] [2024-11-24 01:23:02,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:23:02,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342711862] [2024-11-24 01:23:02,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342711862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:23:02,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:23:02,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-24 01:23:02,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912405866] [2024-11-24 01:23:02,049 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-24 01:23:02,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 01:23:02,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:23:02,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 01:23:02,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-24 01:23:02,051 INFO L87 Difference]: Start difference. First operand 2317 states and 3282 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-24 01:23:03,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:23:03,281 INFO L93 Difference]: Finished difference Result 2432 states and 3440 transitions. [2024-11-24 01:23:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 01:23:03,282 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2024-11-24 01:23:03,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:23:03,292 INFO L225 Difference]: With dead ends: 2432 [2024-11-24 01:23:03,292 INFO L226 Difference]: Without dead ends: 2430 [2024-11-24 01:23:03,293 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2024-11-24 01:23:03,295 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 89 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 01:23:03,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 718 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 01:23:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2024-11-24 01:23:03,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 2326. [2024-11-24 01:23:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 1622 states have (on average 1.3064118372379778) internal successors, (2119), 1660 states have internal predecessors, (2119), 585 states have call successors, (585), 118 states have call predecessors, (585), 118 states have return successors, (576), 547 states have call predecessors, (576), 576 states have call successors, (576) [2024-11-24 01:23:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3280 transitions. [2024-11-24 01:23:03,932 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3280 transitions. Word has length 66 [2024-11-24 01:23:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:23:03,933 INFO L471 AbstractCegarLoop]: Abstraction has 2326 states and 3280 transitions. [2024-11-24 01:23:03,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-24 01:23:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3280 transitions. [2024-11-24 01:23:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-24 01:23:03,934 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:23:03,934 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 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] [2024-11-24 01:23:03,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-24 01:23:04,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:23:04,139 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:23:04,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:23:04,139 INFO L85 PathProgramCache]: Analyzing trace with hash 123182667, now seen corresponding path program 1 times [2024-11-24 01:23:04,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:23:04,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830454021] [2024-11-24 01:23:04,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:23:04,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:23:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 01:23:04,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088349267] [2024-11-24 01:23:04,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:23:04,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:23:04,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:23:04,167 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:23:04,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-24 01:23:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:23:04,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-24 01:23:04,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:23:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-24 01:23:05,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:23:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-24 01:23:06,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:23:06,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830454021] [2024-11-24 01:23:06,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:23:06,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088349267] [2024-11-24 01:23:06,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088349267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:23:06,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:23:06,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-11-24 01:23:06,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871543931] [2024-11-24 01:23:06,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:23:06,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:23:06,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:23:06,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:23:06,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:23:06,097 INFO L87 Difference]: Start difference. First operand 2326 states and 3280 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-24 01:23:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:23:11,897 INFO L93 Difference]: Finished difference Result 2638 states and 3685 transitions. [2024-11-24 01:23:11,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-24 01:23:11,898 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 77 [2024-11-24 01:23:11,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:23:11,913 INFO L225 Difference]: With dead ends: 2638 [2024-11-24 01:23:11,913 INFO L226 Difference]: Without dead ends: 2631 [2024-11-24 01:23:11,915 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-11-24 01:23:11,916 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 272 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-24 01:23:11,916 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 991 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-24 01:23:11,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2024-11-24 01:23:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2546. [2024-11-24 01:23:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 1755 states have (on average 1.2991452991452992) internal successors, (2280), 1794 states have internal predecessors, (2280), 650 states have call successors, (650), 140 states have call predecessors, (650), 140 states have return successors, (644), 611 states have call predecessors, (644), 644 states have call successors, (644) [2024-11-24 01:23:13,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3574 transitions. [2024-11-24 01:23:13,182 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3574 transitions. Word has length 77 [2024-11-24 01:23:13,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:23:13,183 INFO L471 AbstractCegarLoop]: Abstraction has 2546 states and 3574 transitions. [2024-11-24 01:23:13,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-24 01:23:13,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3574 transitions. [2024-11-24 01:23:13,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-24 01:23:13,185 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:23:13,186 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 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] [2024-11-24 01:23:13,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-24 01:23:13,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:23:13,390 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:23:13,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:23:13,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2129784449, now seen corresponding path program 1 times [2024-11-24 01:23:13,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:23:13,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969669950] [2024-11-24 01:23:13,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:23:13,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:23:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-24 01:23:13,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288462493] [2024-11-24 01:23:13,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:23:13,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:23:13,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:23:13,422 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:23:13,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-24 01:23:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:23:13,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-24 01:23:13,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:23:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-24 01:23:14,228 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:23:14,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:23:14,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969669950] [2024-11-24 01:23:14,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:23:14,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288462493] [2024-11-24 01:23:14,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288462493] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:23:14,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:23:14,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-24 01:23:14,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063803302] [2024-11-24 01:23:14,465 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-24 01:23:14,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:23:14,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:23:14,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:23:14,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-11-24 01:23:14,467 INFO L87 Difference]: Start difference. First operand 2546 states and 3574 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-24 01:23:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:23:15,855 INFO L93 Difference]: Finished difference Result 2780 states and 3916 transitions. [2024-11-24 01:23:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 01:23:15,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 89 [2024-11-24 01:23:15,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:23:15,869 INFO L225 Difference]: With dead ends: 2780 [2024-11-24 01:23:15,869 INFO L226 Difference]: Without dead ends: 2778 [2024-11-24 01:23:15,870 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2024-11-24 01:23:15,871 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 108 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 01:23:15,871 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 463 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 01:23:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2024-11-24 01:23:17,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2672. [2024-11-24 01:23:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 1848 states have (on average 1.3014069264069263) internal successors, (2405), 1889 states have internal predecessors, (2405), 678 states have call successors, (678), 145 states have call predecessors, (678), 145 states have return successors, (672), 637 states have call predecessors, (672), 672 states have call successors, (672) [2024-11-24 01:23:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 3755 transitions. [2024-11-24 01:23:17,178 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 3755 transitions. Word has length 89 [2024-11-24 01:23:17,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:23:17,179 INFO L471 AbstractCegarLoop]: Abstraction has 2672 states and 3755 transitions. [2024-11-24 01:23:17,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-24 01:23:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 3755 transitions. [2024-11-24 01:23:17,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-24 01:23:17,181 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:23:17,181 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:23:17,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-24 01:23:17,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:23:17,386 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:23:17,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:23:17,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1671305724, now seen corresponding path program 2 times [2024-11-24 01:23:17,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:23:17,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481873393] [2024-11-24 01:23:17,386 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:23:17,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:23:17,407 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:23:17,407 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-24 01:23:17,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783465870] [2024-11-24 01:23:17,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:23:17,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:23:17,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:23:17,412 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:23:17,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-24 01:23:17,479 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:23:17,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:23:17,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-24 01:23:17,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:23:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-24 01:23:17,796 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:23:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-24 01:23:18,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:23:18,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481873393] [2024-11-24 01:23:18,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:23:18,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783465870] [2024-11-24 01:23:18,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783465870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:23:18,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:23:18,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-11-24 01:23:18,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742746520] [2024-11-24 01:23:18,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:23:18,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-24 01:23:18,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:23:18,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-24 01:23:18,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-11-24 01:23:18,193 INFO L87 Difference]: Start difference. First operand 2672 states and 3755 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-24 01:23:21,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:23:21,053 INFO L93 Difference]: Finished difference Result 4020 states and 5906 transitions. [2024-11-24 01:23:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-24 01:23:21,059 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 92 [2024-11-24 01:23:21,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:23:21,095 INFO L225 Difference]: With dead ends: 4020 [2024-11-24 01:23:21,095 INFO L226 Difference]: Without dead ends: 4016 [2024-11-24 01:23:21,097 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-11-24 01:23:21,098 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 177 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-24 01:23:21,100 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 492 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-24 01:23:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2024-11-24 01:23:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3728. [2024-11-24 01:23:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 2393 states have (on average 1.3531132469703302) internal successors, (3238), 2454 states have internal predecessors, (3238), 1170 states have call successors, (1170), 165 states have call predecessors, (1170), 164 states have return successors, (1164), 1108 states have call predecessors, (1164), 1164 states have call successors, (1164) [2024-11-24 01:23:23,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 5572 transitions. [2024-11-24 01:23:23,151 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 5572 transitions. Word has length 92 [2024-11-24 01:23:23,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:23:23,151 INFO L471 AbstractCegarLoop]: Abstraction has 3728 states and 5572 transitions. [2024-11-24 01:23:23,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-24 01:23:23,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 5572 transitions. [2024-11-24 01:23:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-24 01:23:23,153 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:23:23,153 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:23:23,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-24 01:23:23,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:23:23,358 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:23:23,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:23:23,358 INFO L85 PathProgramCache]: Analyzing trace with hash -382011247, now seen corresponding path program 3 times [2024-11-24 01:23:23,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:23:23,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926664850] [2024-11-24 01:23:23,358 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:23:23,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:23:23,408 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-24 01:23:23,408 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-24 01:23:23,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144976741] [2024-11-24 01:23:23,410 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:23:23,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:23:23,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:23:23,412 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:23:23,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-24 01:23:23,488 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-24 01:23:23,488 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:23:23,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-24 01:23:23,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:23:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-24 01:23:24,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:23:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-11-24 01:23:26,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:23:26,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926664850] [2024-11-24 01:23:26,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:23:26,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144976741] [2024-11-24 01:23:26,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144976741] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:23:26,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:23:26,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2024-11-24 01:23:26,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74527819] [2024-11-24 01:23:26,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:23:26,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-24 01:23:26,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:23:26,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-24 01:23:26,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-11-24 01:23:26,178 INFO L87 Difference]: Start difference. First operand 3728 states and 5572 transitions. Second operand has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-24 01:23:34,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 01:23:47,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 01:23:52,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 01:23:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:23:58,918 INFO L93 Difference]: Finished difference Result 6085 states and 9401 transitions. [2024-11-24 01:23:58,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-24 01:23:58,919 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 94 [2024-11-24 01:23:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:23:58,947 INFO L225 Difference]: With dead ends: 6085 [2024-11-24 01:23:58,948 INFO L226 Difference]: Without dead ends: 6083 [2024-11-24 01:23:58,952 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4359 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=2608, Invalid=10048, Unknown=0, NotChecked=0, Total=12656 [2024-11-24 01:23:58,953 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 523 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 361 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:23:58,953 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1438 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1283 Invalid, 1 Unknown, 0 Unchecked, 13.0s Time] [2024-11-24 01:23:58,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6083 states. [2024-11-24 01:24:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6083 to 4359. [2024-11-24 01:24:01,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 2872 states have (on average 1.3561977715877438) internal successors, (3895), 2937 states have internal predecessors, (3895), 1292 states have call successors, (1292), 195 states have call predecessors, (1292), 194 states have return successors, (1286), 1226 states have call predecessors, (1286), 1286 states have call successors, (1286) [2024-11-24 01:24:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6473 transitions. [2024-11-24 01:24:01,793 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 6473 transitions. Word has length 94 [2024-11-24 01:24:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:24:01,793 INFO L471 AbstractCegarLoop]: Abstraction has 4359 states and 6473 transitions. [2024-11-24 01:24:01,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-24 01:24:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 6473 transitions. [2024-11-24 01:24:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-24 01:24:01,796 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:24:01,797 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 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] [2024-11-24 01:24:01,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-24 01:24:02,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-24 01:24:02,001 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:24:02,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:24:02,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1131966787, now seen corresponding path program 3 times [2024-11-24 01:24:02,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:24:02,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043120908] [2024-11-24 01:24:02,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:24:02,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:24:02,049 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-24 01:24:02,049 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-24 01:24:02,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005246049] [2024-11-24 01:24:02,051 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:24:02,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:24:02,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:24:02,053 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:24:02,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-24 01:24:02,135 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-24 01:24:02,135 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:24:02,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-24 01:24:02,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:24:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-24 01:24:03,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:24:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-24 01:24:04,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:24:04,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043120908] [2024-11-24 01:24:04,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:24:04,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005246049] [2024-11-24 01:24:04,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005246049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:24:04,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:24:04,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-11-24 01:24:04,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84108924] [2024-11-24 01:24:04,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:24:04,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-24 01:24:04,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:24:04,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-24 01:24:04,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2024-11-24 01:24:04,614 INFO L87 Difference]: Start difference. First operand 4359 states and 6473 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-24 01:24:13,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 01:24:21,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 01:24:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:24:26,321 INFO L93 Difference]: Finished difference Result 6422 states and 9875 transitions. [2024-11-24 01:24:26,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-24 01:24:26,322 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 93 [2024-11-24 01:24:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:24:26,347 INFO L225 Difference]: With dead ends: 6422 [2024-11-24 01:24:26,348 INFO L226 Difference]: Without dead ends: 6420 [2024-11-24 01:24:26,352 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1555, Invalid=5755, Unknown=0, NotChecked=0, Total=7310 [2024-11-24 01:24:26,353 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 490 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2024-11-24 01:24:26,353 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1117 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2024-11-24 01:24:26,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6420 states. [2024-11-24 01:24:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6420 to 5295. [2024-11-24 01:24:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5295 states, 3524 states have (on average 1.3742905788876276) internal successors, (4843), 3595 states have internal predecessors, (4843), 1566 states have call successors, (1566), 205 states have call predecessors, (1566), 204 states have return successors, (1560), 1494 states have call predecessors, (1560), 1560 states have call successors, (1560) [2024-11-24 01:24:29,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5295 states to 5295 states and 7969 transitions. [2024-11-24 01:24:29,825 INFO L78 Accepts]: Start accepts. Automaton has 5295 states and 7969 transitions. Word has length 93 [2024-11-24 01:24:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:24:29,826 INFO L471 AbstractCegarLoop]: Abstraction has 5295 states and 7969 transitions. [2024-11-24 01:24:29,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-24 01:24:29,826 INFO L276 IsEmpty]: Start isEmpty. Operand 5295 states and 7969 transitions. [2024-11-24 01:24:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-24 01:24:29,828 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:24:29,828 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 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] [2024-11-24 01:24:29,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-24 01:24:30,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-24 01:24:30,033 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:24:30,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:24:30,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1812886516, now seen corresponding path program 1 times [2024-11-24 01:24:30,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:24:30,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562322748] [2024-11-24 01:24:30,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:24:30,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:24:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:24:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-24 01:24:30,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:24:30,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562322748] [2024-11-24 01:24:30,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562322748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:24:30,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450304546] [2024-11-24 01:24:30,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:24:30,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:24:30,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:24:30,415 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:24:30,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-24 01:24:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:24:30,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-24 01:24:30,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:24:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-24 01:24:30,672 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:24:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-24 01:24:31,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450304546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:24:31,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:24:31,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 24 [2024-11-24 01:24:31,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257026389] [2024-11-24 01:24:31,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:24:31,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-24 01:24:31,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:24:31,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-24 01:24:31,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2024-11-24 01:24:31,089 INFO L87 Difference]: Start difference. First operand 5295 states and 7969 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2024-11-24 01:24:40,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:24:40,915 INFO L93 Difference]: Finished difference Result 14472 states and 23201 transitions. [2024-11-24 01:24:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-24 01:24:40,915 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 94 [2024-11-24 01:24:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:24:40,968 INFO L225 Difference]: With dead ends: 14472 [2024-11-24 01:24:40,969 INFO L226 Difference]: Without dead ends: 12237 [2024-11-24 01:24:40,979 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2024-11-24 01:24:40,980 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 458 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-24 01:24:40,980 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 447 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-24 01:24:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12237 states. [2024-11-24 01:24:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12237 to 11826. [2024-11-24 01:24:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11826 states, 7039 states have (on average 1.399488563716437) internal successors, (9851), 7052 states have internal predecessors, (9851), 4442 states have call successors, (4442), 345 states have call predecessors, (4442), 344 states have return successors, (4430), 4428 states have call predecessors, (4430), 4430 states have call successors, (4430) [2024-11-24 01:24:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11826 states to 11826 states and 18723 transitions. [2024-11-24 01:24:50,073 INFO L78 Accepts]: Start accepts. Automaton has 11826 states and 18723 transitions. Word has length 94 [2024-11-24 01:24:50,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:24:50,074 INFO L471 AbstractCegarLoop]: Abstraction has 11826 states and 18723 transitions. [2024-11-24 01:24:50,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2024-11-24 01:24:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 11826 states and 18723 transitions. [2024-11-24 01:24:50,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-24 01:24:50,076 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:24:50,076 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 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] [2024-11-24 01:24:50,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-24 01:24:50,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-24 01:24:50,277 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:24:50,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:24:50,277 INFO L85 PathProgramCache]: Analyzing trace with hash 897961191, now seen corresponding path program 2 times [2024-11-24 01:24:50,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:24:50,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805340387] [2024-11-24 01:24:50,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:24:50,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:24:50,303 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:24:50,306 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:24:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-24 01:24:50,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:24:50,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805340387] [2024-11-24 01:24:50,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805340387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:24:50,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378949842] [2024-11-24 01:24:50,527 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:24:50,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:24:50,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:24:50,530 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:24:50,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-24 01:24:50,604 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:24:50,604 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:24:50,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:24:50,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:24:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-24 01:24:50,773 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:24:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-24 01:24:50,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378949842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:24:50,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:24:50,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2024-11-24 01:24:50,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48648103] [2024-11-24 01:24:50,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:24:50,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 01:24:50,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:24:50,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 01:24:50,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-24 01:24:50,996 INFO L87 Difference]: Start difference. First operand 11826 states and 18723 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-24 01:25:05,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:25:05,277 INFO L93 Difference]: Finished difference Result 16861 states and 26997 transitions. [2024-11-24 01:25:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-24 01:25:05,277 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2024-11-24 01:25:05,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:25:05,381 INFO L225 Difference]: With dead ends: 16861 [2024-11-24 01:25:05,381 INFO L226 Difference]: Without dead ends: 16076 [2024-11-24 01:25:05,392 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 190 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2024-11-24 01:25:05,393 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 232 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-24 01:25:05,393 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 564 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-24 01:25:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2024-11-24 01:25:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 12179. [2024-11-24 01:25:16,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12179 states, 7356 states have (on average 1.394915715062534) internal successors, (10261), 7369 states have internal predecessors, (10261), 4478 states have call successors, (4478), 345 states have call predecessors, (4478), 344 states have return successors, (4466), 4464 states have call predecessors, (4466), 4466 states have call successors, (4466) [2024-11-24 01:25:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12179 states to 12179 states and 19205 transitions. [2024-11-24 01:25:16,322 INFO L78 Accepts]: Start accepts. Automaton has 12179 states and 19205 transitions. Word has length 95 [2024-11-24 01:25:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:25:16,322 INFO L471 AbstractCegarLoop]: Abstraction has 12179 states and 19205 transitions. [2024-11-24 01:25:16,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-24 01:25:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 12179 states and 19205 transitions. [2024-11-24 01:25:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-24 01:25:16,325 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:25:16,326 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:25:16,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-24 01:25:16,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-24 01:25:16,526 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:25:16,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:25:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1157573561, now seen corresponding path program 2 times [2024-11-24 01:25:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:25:16,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231660408] [2024-11-24 01:25:16,527 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:25:16,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:25:16,573 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:25:16,575 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-24 01:25:16,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667249805] [2024-11-24 01:25:16,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:25:16,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:25:16,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:25:16,579 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:25:16,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-24 01:25:16,684 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:25:16,684 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:25:16,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-24 01:25:16,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:25:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 50 proven. 47 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-11-24 01:25:19,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:25:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 50 proven. 47 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-11-24 01:25:23,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:25:23,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231660408] [2024-11-24 01:25:23,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:25:23,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667249805] [2024-11-24 01:25:23,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667249805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:25:23,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:25:23,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2024-11-24 01:25:23,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222212107] [2024-11-24 01:25:23,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:25:23,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-24 01:25:23,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:25:23,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-24 01:25:23,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2024-11-24 01:25:23,239 INFO L87 Difference]: Start difference. First operand 12179 states and 19205 transitions. Second operand has 31 states, 29 states have (on average 2.689655172413793) internal successors, (78), 30 states have internal predecessors, (78), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-24 01:25:51,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-24 01:26:42,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-24 01:27:25,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-24 01:27:31,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:27:31,741 INFO L93 Difference]: Finished difference Result 17578 states and 27698 transitions. [2024-11-24 01:27:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-11-24 01:27:31,743 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.689655172413793) internal successors, (78), 30 states have internal predecessors, (78), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 107 [2024-11-24 01:27:31,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:27:31,856 INFO L225 Difference]: With dead ends: 17578 [2024-11-24 01:27:31,856 INFO L226 Difference]: Without dead ends: 17518 [2024-11-24 01:27:31,869 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6575 ImplicationChecksByTransitivity, 77.1s TimeCoverageRelationStatistics Valid=3203, Invalid=15702, Unknown=1, NotChecked=0, Total=18906 [2024-11-24 01:27:31,870 INFO L435 NwaCegarLoop]: 166 mSDtfsCounter, 581 mSDsluCounter, 2858 mSDsCounter, 0 mSdLazyCounter, 2528 mSolverCounterSat, 404 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 3024 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 2528 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.6s IncrementalHoareTripleChecker+Time [2024-11-24 01:27:31,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 3024 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 2528 Invalid, 2 Unknown, 0 Unchecked, 35.6s Time] [2024-11-24 01:27:31,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17518 states. [2024-11-24 01:27:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17518 to 13158. [2024-11-24 01:27:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13158 states, 7981 states have (on average 1.3951885728605438) internal successors, (11135), 7994 states have internal predecessors, (11135), 4810 states have call successors, (4810), 367 states have call predecessors, (4810), 366 states have return successors, (4798), 4796 states have call predecessors, (4798), 4798 states have call successors, (4798) [2024-11-24 01:27:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13158 states to 13158 states and 20743 transitions. [2024-11-24 01:27:46,282 INFO L78 Accepts]: Start accepts. Automaton has 13158 states and 20743 transitions. Word has length 107 [2024-11-24 01:27:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:27:46,282 INFO L471 AbstractCegarLoop]: Abstraction has 13158 states and 20743 transitions. [2024-11-24 01:27:46,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.689655172413793) internal successors, (78), 30 states have internal predecessors, (78), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-24 01:27:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 13158 states and 20743 transitions. [2024-11-24 01:27:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-24 01:27:46,285 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:27:46,286 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 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] [2024-11-24 01:27:46,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-24 01:27:46,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:27:46,486 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:27:46,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:27:46,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2039989011, now seen corresponding path program 1 times [2024-11-24 01:27:46,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:27:46,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208928538] [2024-11-24 01:27:46,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:27:46,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:27:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:27:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 01:27:46,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:27:46,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208928538] [2024-11-24 01:27:46,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208928538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:27:46,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071454773] [2024-11-24 01:27:46,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:27:46,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:27:46,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:27:46,979 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:27:46,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-24 01:27:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:27:47,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-24 01:27:47,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:27:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 64 proven. 116 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-24 01:27:47,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:27:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 01:27:47,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071454773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:27:47,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:27:47,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 26 [2024-11-24 01:27:47,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465805310] [2024-11-24 01:27:47,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:27:47,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-24 01:27:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:27:47,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-24 01:27:47,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2024-11-24 01:27:47,970 INFO L87 Difference]: Start difference. First operand 13158 states and 20743 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2024-11-24 01:28:05,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:28:05,456 INFO L93 Difference]: Finished difference Result 23734 states and 37718 transitions. [2024-11-24 01:28:05,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-24 01:28:05,456 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 106 [2024-11-24 01:28:05,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:28:05,529 INFO L225 Difference]: With dead ends: 23734 [2024-11-24 01:28:05,529 INFO L226 Difference]: Without dead ends: 15631 [2024-11-24 01:28:05,560 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2024-11-24 01:28:05,561 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 502 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-24 01:28:05,561 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 457 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-24 01:28:05,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15631 states. [2024-11-24 01:28:22,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15631 to 15379. [2024-11-24 01:28:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15379 states, 9298 states have (on average 1.2776941277694127) internal successors, (11880), 9313 states have internal predecessors, (11880), 5664 states have call successors, (5664), 417 states have call predecessors, (5664), 416 states have return successors, (5650), 5648 states have call predecessors, (5650), 5650 states have call successors, (5650) [2024-11-24 01:28:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15379 states to 15379 states and 23194 transitions. [2024-11-24 01:28:22,276 INFO L78 Accepts]: Start accepts. Automaton has 15379 states and 23194 transitions. Word has length 106 [2024-11-24 01:28:22,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:28:22,277 INFO L471 AbstractCegarLoop]: Abstraction has 15379 states and 23194 transitions. [2024-11-24 01:28:22,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2024-11-24 01:28:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 15379 states and 23194 transitions. [2024-11-24 01:28:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-24 01:28:22,279 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:28:22,279 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:28:22,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-24 01:28:22,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:28:22,484 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:28:22,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:28:22,484 INFO L85 PathProgramCache]: Analyzing trace with hash -69997885, now seen corresponding path program 3 times [2024-11-24 01:28:22,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:28:22,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429917492] [2024-11-24 01:28:22,484 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:28:22,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:28:22,515 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-24 01:28:22,515 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-24 01:28:22,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890507314] [2024-11-24 01:28:22,516 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:28:22,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:28:22,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:28:22,520 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:28:22,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-24 01:28:22,613 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-24 01:28:22,613 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:28:22,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-24 01:28:22,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:28:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-24 01:28:24,160 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:28:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-24 01:28:26,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:28:26,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429917492] [2024-11-24 01:28:26,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:28:26,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890507314] [2024-11-24 01:28:26,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890507314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:28:26,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:28:26,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2024-11-24 01:28:26,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811289953] [2024-11-24 01:28:26,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:28:26,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-24 01:28:26,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:28:26,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-24 01:28:26,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2024-11-24 01:28:26,033 INFO L87 Difference]: Start difference. First operand 15379 states and 23194 transitions. Second operand has 29 states, 27 states have (on average 3.0) internal successors, (81), 28 states have internal predecessors, (81), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2024-11-24 01:29:27,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:29:27,483 INFO L93 Difference]: Finished difference Result 21889 states and 33204 transitions. [2024-11-24 01:29:27,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2024-11-24 01:29:27,483 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.0) internal successors, (81), 28 states have internal predecessors, (81), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 111 [2024-11-24 01:29:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:29:27,545 INFO L225 Difference]: With dead ends: 21889 [2024-11-24 01:29:27,545 INFO L226 Difference]: Without dead ends: 18461 [2024-11-24 01:29:27,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8247 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=3936, Invalid=17820, Unknown=0, NotChecked=0, Total=21756 [2024-11-24 01:29:27,560 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 663 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1718 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-24 01:29:27,560 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1718 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-24 01:29:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18461 states. [2024-11-24 01:29:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18461 to 15742. [2024-11-24 01:29:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15742 states, 9520 states have (on average 1.2794117647058822) internal successors, (12180), 9535 states have internal predecessors, (12180), 5796 states have call successors, (5796), 426 states have call predecessors, (5796), 425 states have return successors, (5782), 5780 states have call predecessors, (5782), 5782 states have call successors, (5782) [2024-11-24 01:29:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15742 states to 15742 states and 23758 transitions. [2024-11-24 01:29:48,150 INFO L78 Accepts]: Start accepts. Automaton has 15742 states and 23758 transitions. Word has length 111 [2024-11-24 01:29:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:29:48,150 INFO L471 AbstractCegarLoop]: Abstraction has 15742 states and 23758 transitions. [2024-11-24 01:29:48,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.0) internal successors, (81), 28 states have internal predecessors, (81), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2024-11-24 01:29:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 15742 states and 23758 transitions. [2024-11-24 01:29:48,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-24 01:29:48,153 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:29:48,153 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:29:48,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-24 01:29:48,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:29:48,353 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:29:48,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:29:48,354 INFO L85 PathProgramCache]: Analyzing trace with hash 665078539, now seen corresponding path program 4 times [2024-11-24 01:29:48,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:29:48,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897866919] [2024-11-24 01:29:48,354 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:29:48,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:29:48,375 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:29:48,375 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-24 01:29:48,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931749826] [2024-11-24 01:29:48,377 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:29:48,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:29:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:29:48,379 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:29:48,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-24 01:29:48,467 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:29:48,467 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:29:48,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-24 01:29:48,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:29:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-11-24 01:29:50,540 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:29:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-24 01:29:52,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:29:52,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897866919] [2024-11-24 01:29:52,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:29:52,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931749826] [2024-11-24 01:29:52,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931749826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:29:52,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:29:52,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2024-11-24 01:29:52,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670154719] [2024-11-24 01:29:52,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:29:52,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-24 01:29:52,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:29:52,737 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-24 01:29:52,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2024-11-24 01:29:52,737 INFO L87 Difference]: Start difference. First operand 15742 states and 23758 transitions. Second operand has 35 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-24 01:29:59,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-24 01:30:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:30:49,428 INFO L93 Difference]: Finished difference Result 18609 states and 28152 transitions. [2024-11-24 01:30:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-24 01:30:49,429 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 111 [2024-11-24 01:30:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:30:49,486 INFO L225 Difference]: With dead ends: 18609 [2024-11-24 01:30:49,486 INFO L226 Difference]: Without dead ends: 18587 [2024-11-24 01:30:49,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4580 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=2291, Invalid=12715, Unknown=0, NotChecked=0, Total=15006 [2024-11-24 01:30:49,493 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 566 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 2218 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-24 01:30:49,493 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 2218 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 1733 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-11-24 01:30:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18587 states. [2024-11-24 01:31:12,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18587 to 15629. [2024-11-24 01:31:12,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15629 states, 9487 states have (on average 1.2749024981553705) internal successors, (12095), 9509 states have internal predecessors, (12095), 5686 states have call successors, (5686), 456 states have call predecessors, (5686), 455 states have return successors, (5672), 5663 states have call predecessors, (5672), 5672 states have call successors, (5672) [2024-11-24 01:31:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15629 states to 15629 states and 23453 transitions. [2024-11-24 01:31:12,209 INFO L78 Accepts]: Start accepts. Automaton has 15629 states and 23453 transitions. Word has length 111 [2024-11-24 01:31:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:31:12,210 INFO L471 AbstractCegarLoop]: Abstraction has 15629 states and 23453 transitions. [2024-11-24 01:31:12,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-24 01:31:12,210 INFO L276 IsEmpty]: Start isEmpty. Operand 15629 states and 23453 transitions. [2024-11-24 01:31:12,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-24 01:31:12,213 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:31:12,213 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:31:12,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-24 01:31:12,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-24 01:31:12,413 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:31:12,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:31:12,414 INFO L85 PathProgramCache]: Analyzing trace with hash 348326399, now seen corresponding path program 4 times [2024-11-24 01:31:12,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:31:12,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980337771] [2024-11-24 01:31:12,414 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:31:12,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:31:12,443 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:31:12,443 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-24 01:31:12,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052171297] [2024-11-24 01:31:12,444 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:31:12,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:31:12,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:31:12,452 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:31:12,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-24 01:31:12,532 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:31:12,532 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:31:12,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-24 01:31:12,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:31:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 50 proven. 107 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-24 01:31:14,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:31:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 101 proven. 10 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2024-11-24 01:31:14,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:31:14,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980337771] [2024-11-24 01:31:14,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:31:14,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052171297] [2024-11-24 01:31:14,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052171297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:31:14,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:31:14,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 7] total 27 [2024-11-24 01:31:14,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672405290] [2024-11-24 01:31:14,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:31:14,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-24 01:31:14,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:31:14,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-24 01:31:14,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-11-24 01:31:14,843 INFO L87 Difference]: Start difference. First operand 15629 states and 23453 transitions. Second operand has 27 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 25 states have internal predecessors, (96), 8 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-24 01:31:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:31:44,942 INFO L93 Difference]: Finished difference Result 17779 states and 26736 transitions. [2024-11-24 01:31:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-24 01:31:44,942 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 25 states have internal predecessors, (96), 8 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 123 [2024-11-24 01:31:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:31:44,990 INFO L225 Difference]: With dead ends: 17779 [2024-11-24 01:31:44,990 INFO L226 Difference]: Without dead ends: 17777 [2024-11-24 01:31:44,995 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2024-11-24 01:31:44,995 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 172 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-24 01:31:44,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 1730 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-24 01:31:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17777 states. [2024-11-24 01:32:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17777 to 15991. [2024-11-24 01:32:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15991 states, 9786 states have (on average 1.275495605967709) internal successors, (12482), 9825 states have internal predecessors, (12482), 5712 states have call successors, (5712), 493 states have call predecessors, (5712), 492 states have return successors, (5698), 5672 states have call predecessors, (5698), 5698 states have call successors, (5698) [2024-11-24 01:32:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15991 states to 15991 states and 23892 transitions. [2024-11-24 01:32:08,141 INFO L78 Accepts]: Start accepts. Automaton has 15991 states and 23892 transitions. Word has length 123 [2024-11-24 01:32:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:32:08,141 INFO L471 AbstractCegarLoop]: Abstraction has 15991 states and 23892 transitions. [2024-11-24 01:32:08,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 25 states have internal predecessors, (96), 8 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-24 01:32:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 15991 states and 23892 transitions. [2024-11-24 01:32:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-24 01:32:08,144 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:32:08,144 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-11-24 01:32:08,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-24 01:32:08,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-24 01:32:08,349 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:32:08,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:32:08,349 INFO L85 PathProgramCache]: Analyzing trace with hash 117355431, now seen corresponding path program 5 times [2024-11-24 01:32:08,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:32:08,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707643622] [2024-11-24 01:32:08,349 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:32:08,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:32:08,377 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-24 01:32:08,377 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-24 01:32:08,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267050326] [2024-11-24 01:32:08,378 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:32:08,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:32:08,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:32:08,380 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:32:08,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-24 01:32:08,497 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-24 01:32:08,497 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:32:08,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-24 01:32:08,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:32:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 32 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-24 01:32:09,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:32:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 32 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-24 01:32:10,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:32:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707643622] [2024-11-24 01:32:10,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:32:10,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267050326] [2024-11-24 01:32:10,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267050326] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:32:10,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:32:10,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2024-11-24 01:32:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748556242] [2024-11-24 01:32:10,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:32:10,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-24 01:32:10,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:32:10,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-24 01:32:10,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2024-11-24 01:32:10,900 INFO L87 Difference]: Start difference. First operand 15991 states and 23892 transitions. Second operand has 24 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 23 states have internal predecessors, (73), 11 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2024-11-24 01:32:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:32:40,989 INFO L93 Difference]: Finished difference Result 17832 states and 26656 transitions. [2024-11-24 01:32:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-24 01:32:40,989 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 23 states have internal predecessors, (73), 11 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 127 [2024-11-24 01:32:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:32:41,036 INFO L225 Difference]: With dead ends: 17832 [2024-11-24 01:32:41,036 INFO L226 Difference]: Without dead ends: 17792 [2024-11-24 01:32:41,041 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=809, Invalid=3351, Unknown=0, NotChecked=0, Total=4160 [2024-11-24 01:32:41,041 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 316 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-24 01:32:41,041 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 1225 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-24 01:32:41,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17792 states. [2024-11-24 01:33:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17792 to 16430. [2024-11-24 01:33:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16430 states, 10060 states have (on average 1.271868787276342) internal successors, (12795), 10106 states have internal predecessors, (12795), 5846 states have call successors, (5846), 524 states have call predecessors, (5846), 523 states have return successors, (5832), 5799 states have call predecessors, (5832), 5832 states have call successors, (5832) [2024-11-24 01:33:02,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16430 states to 16430 states and 24473 transitions. [2024-11-24 01:33:02,972 INFO L78 Accepts]: Start accepts. Automaton has 16430 states and 24473 transitions. Word has length 127 [2024-11-24 01:33:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:33:02,973 INFO L471 AbstractCegarLoop]: Abstraction has 16430 states and 24473 transitions. [2024-11-24 01:33:02,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 23 states have internal predecessors, (73), 11 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2024-11-24 01:33:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 16430 states and 24473 transitions. [2024-11-24 01:33:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-24 01:33:02,975 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:33:02,975 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:33:02,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-24 01:33:03,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-24 01:33:03,177 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:33:03,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:33:03,178 INFO L85 PathProgramCache]: Analyzing trace with hash -14191919, now seen corresponding path program 5 times [2024-11-24 01:33:03,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:33:03,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35132250] [2024-11-24 01:33:03,178 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:33:03,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:33:03,208 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-24 01:33:03,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-24 01:33:03,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662142403] [2024-11-24 01:33:03,210 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:33:03,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:33:03,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:33:03,212 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:33:03,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-24 01:33:03,378 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-24 01:33:03,378 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:33:03,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-24 01:33:03,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:33:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 97 proven. 137 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2024-11-24 01:33:06,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:33:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 145 proven. 21 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-24 01:33:08,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:33:08,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35132250] [2024-11-24 01:33:08,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:33:08,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662142403] [2024-11-24 01:33:08,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662142403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:33:08,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:33:08,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12] total 34 [2024-11-24 01:33:08,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638298207] [2024-11-24 01:33:08,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:33:08,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-24 01:33:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:33:08,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-24 01:33:08,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2024-11-24 01:33:08,106 INFO L87 Difference]: Start difference. First operand 16430 states and 24473 transitions. Second operand has 34 states, 31 states have (on average 3.193548387096774) internal successors, (99), 27 states have internal predecessors, (99), 13 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 11 states have call successors, (24) [2024-11-24 01:33:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:33:40,629 INFO L93 Difference]: Finished difference Result 17873 states and 26321 transitions. [2024-11-24 01:33:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-24 01:33:40,629 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 3.193548387096774) internal successors, (99), 27 states have internal predecessors, (99), 13 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 11 states have call successors, (24) Word has length 128 [2024-11-24 01:33:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:33:40,689 INFO L225 Difference]: With dead ends: 17873 [2024-11-24 01:33:40,689 INFO L226 Difference]: Without dead ends: 17867 [2024-11-24 01:33:40,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=633, Invalid=3789, Unknown=0, NotChecked=0, Total=4422 [2024-11-24 01:33:40,696 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 261 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-24 01:33:40,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1219 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-24 01:33:40,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17867 states. [2024-11-24 01:34:10,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17867 to 17742. [2024-11-24 01:34:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17742 states, 10946 states have (on average 1.265850539009684) internal successors, (13856), 11002 states have internal predecessors, (13856), 6166 states have call successors, (6166), 630 states have call predecessors, (6166), 629 states have return successors, (6154), 6109 states have call predecessors, (6154), 6154 states have call successors, (6154) [2024-11-24 01:34:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17742 states to 17742 states and 26176 transitions. [2024-11-24 01:34:10,962 INFO L78 Accepts]: Start accepts. Automaton has 17742 states and 26176 transitions. Word has length 128 [2024-11-24 01:34:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:34:10,963 INFO L471 AbstractCegarLoop]: Abstraction has 17742 states and 26176 transitions. [2024-11-24 01:34:10,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 3.193548387096774) internal successors, (99), 27 states have internal predecessors, (99), 13 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 11 states have call successors, (24) [2024-11-24 01:34:10,963 INFO L276 IsEmpty]: Start isEmpty. Operand 17742 states and 26176 transitions. [2024-11-24 01:34:10,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-24 01:34:10,966 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:34:10,966 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:34:10,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-24 01:34:11,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-24 01:34:11,171 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:34:11,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:34:11,171 INFO L85 PathProgramCache]: Analyzing trace with hash 375993539, now seen corresponding path program 2 times [2024-11-24 01:34:11,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:34:11,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217984526] [2024-11-24 01:34:11,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:34:11,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:34:11,205 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:34:11,205 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:34:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-24 01:34:12,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:34:12,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217984526] [2024-11-24 01:34:12,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217984526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:34:12,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193652643] [2024-11-24 01:34:12,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:34:12,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:34:12,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:34:12,703 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:34:12,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-24 01:34:12,801 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:34:12,801 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:34:12,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-24 01:34:12,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:34:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-24 01:34:13,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:34:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-24 01:34:13,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193652643] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:34:13,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:34:13,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 35 [2024-11-24 01:34:13,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644830298] [2024-11-24 01:34:13,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:34:13,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-24 01:34:13,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:34:13,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-24 01:34:13,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=671, Unknown=0, NotChecked=0, Total=1190 [2024-11-24 01:34:13,777 INFO L87 Difference]: Start difference. First operand 17742 states and 26176 transitions. Second operand has 35 states, 35 states have (on average 3.742857142857143) internal successors, (131), 35 states have internal predecessors, (131), 9 states have call successors, (43), 6 states have call predecessors, (43), 5 states have return successors, (42), 8 states have call predecessors, (42), 8 states have call successors, (42) [2024-11-24 01:35:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 01:35:22,353 INFO L93 Difference]: Finished difference Result 37528 states and 58500 transitions. [2024-11-24 01:35:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-24 01:35:22,354 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.742857142857143) internal successors, (131), 35 states have internal predecessors, (131), 9 states have call successors, (43), 6 states have call predecessors, (43), 5 states have return successors, (42), 8 states have call predecessors, (42), 8 states have call successors, (42) Word has length 128 [2024-11-24 01:35:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 01:35:22,542 INFO L225 Difference]: With dead ends: 37528 [2024-11-24 01:35:22,542 INFO L226 Difference]: Without dead ends: 37486 [2024-11-24 01:35:22,560 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1676, Invalid=3580, Unknown=0, NotChecked=0, Total=5256 [2024-11-24 01:35:22,562 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 692 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-24 01:35:22,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 633 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-24 01:35:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37486 states. [2024-11-24 01:36:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37486 to 36343. [2024-11-24 01:36:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36343 states, 22424 states have (on average 1.3562254727078131) internal successors, (30412), 22807 states have internal predecessors, (30412), 12982 states have call successors, (12982), 937 states have call predecessors, (12982), 936 states have return successors, (12962), 12598 states have call predecessors, (12962), 12962 states have call successors, (12962) [2024-11-24 01:36:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36343 states to 36343 states and 56356 transitions. [2024-11-24 01:36:24,511 INFO L78 Accepts]: Start accepts. Automaton has 36343 states and 56356 transitions. Word has length 128 [2024-11-24 01:36:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 01:36:24,512 INFO L471 AbstractCegarLoop]: Abstraction has 36343 states and 56356 transitions. [2024-11-24 01:36:24,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.742857142857143) internal successors, (131), 35 states have internal predecessors, (131), 9 states have call successors, (43), 6 states have call predecessors, (43), 5 states have return successors, (42), 8 states have call predecessors, (42), 8 states have call successors, (42) [2024-11-24 01:36:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 36343 states and 56356 transitions. [2024-11-24 01:36:24,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-24 01:36:24,517 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 01:36:24,517 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:36:24,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-24 01:36:24,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-24 01:36:24,718 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-24 01:36:24,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:36:24,719 INFO L85 PathProgramCache]: Analyzing trace with hash 473705976, now seen corresponding path program 6 times [2024-11-24 01:36:24,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:36:24,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991748974] [2024-11-24 01:36:24,719 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:36:24,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:36:24,786 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-24 01:36:24,789 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-24 01:36:24,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256833160] [2024-11-24 01:36:24,791 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:36:24,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:36:24,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:36:24,793 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:36:24,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed174c91-f962-4d29-ba2a-a13054849693/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-24 01:36:24,942 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-24 01:36:24,942 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:36:24,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-24 01:36:24,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:36:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 32 proven. 85 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-24 01:36:27,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:36:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 32 proven. 85 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-24 01:36:30,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:36:30,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991748974] [2024-11-24 01:36:30,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-24 01:36:30,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256833160] [2024-11-24 01:36:30,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256833160] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:36:30,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:36:30,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2024-11-24 01:36:30,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327977309] [2024-11-24 01:36:30,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 01:36:30,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-24 01:36:30,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:36:30,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-24 01:36:30,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2024-11-24 01:36:30,981 INFO L87 Difference]: Start difference. First operand 36343 states and 56356 transitions. Second operand has 34 states, 32 states have (on average 2.96875) internal successors, (95), 33 states have internal predecessors, (95), 11 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34)