./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/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 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:32:55,668 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:32:55,744 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 23:32:55,749 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:32:55,750 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:32:55,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:32:55,777 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:32:55,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:32:55,778 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:32:55,778 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:32:55,778 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:32:55,779 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:32:55,779 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:32:55,779 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:32:55,779 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:32:55,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:32:55,780 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 23:32:55,780 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:32:55,780 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:32:55,780 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:32:55,780 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:32:55,781 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 23:32:55,781 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:32:55,781 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 23:32:55,781 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:32:55,781 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 23:32:55,781 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:32:55,781 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:32:55,782 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:32:55,782 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:32:55,782 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:32:55,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:32:55,782 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:32:55,782 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:32:55,783 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:32:55,783 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:32:55,783 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:32:55,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:32:55,783 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:32:55,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:32:55,783 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 23:32:55,784 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 23:32:55,784 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:32:55,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:32:55,784 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:32:55,784 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:32:55,784 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:32:55,784 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:32:55,785 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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/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 -> 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c [2024-11-23 23:32:56,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:32:56,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:32:56,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:32:56,113 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:32:56,114 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:32:56,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2024-11-23 23:32:59,258 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/data/75a67c8b9/10c45569558a409dba5fc29f3a9c8a5f/FLAG5cc2c5c74 [2024-11-23 23:32:59,635 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:32:59,637 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2024-11-23 23:32:59,655 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/data/75a67c8b9/10c45569558a409dba5fc29f3a9c8a5f/FLAG5cc2c5c74 [2024-11-23 23:32:59,686 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/data/75a67c8b9/10c45569558a409dba5fc29f3a9c8a5f [2024-11-23 23:32:59,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:32:59,691 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:32:59,695 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:32:59,699 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:32:59,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:32:59,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:32:59" (1/1) ... [2024-11-23 23:32:59,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29f168ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:32:59, skipping insertion in model container [2024-11-23 23:32:59,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:32:59" (1/1) ... [2024-11-23 23:32:59,749 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:32:59,964 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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2024-11-23 23:32:59,972 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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2024-11-23 23:33:00,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:33:00,034 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:33:00,050 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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2024-11-23 23:33:00,052 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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2024-11-23 23:33:00,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:33:00,105 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:33:00,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00 WrapperNode [2024-11-23 23:33:00,106 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:33:00,107 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:33:00,107 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:33:00,107 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:33:00,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,128 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,150 INFO L138 Inliner]: procedures = 27, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2024-11-23 23:33:00,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:33:00,151 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:33:00,151 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:33:00,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:33:00,163 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,165 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,181 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]. [2024-11-23 23:33:00,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,190 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,191 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,208 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,209 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,216 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:33:00,217 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:33:00,217 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:33:00,217 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:33:00,222 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (1/1) ... [2024-11-23 23:33:00,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:33:00,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:33:00,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:33:00,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:33:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:33:00,322 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-23 23:33:00,323 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-23 23:33:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-23 23:33:00,323 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-23 23:33:00,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:33:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:33:00,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:33:00,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-23 23:33:00,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-23 23:33:00,444 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:33:00,452 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:33:01,034 INFO L? ?]: Removed 60 outVars from TransFormulas that were not future-live. [2024-11-23 23:33:01,035 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:33:01,057 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:33:01,058 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-23 23:33:01,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:33:01 BoogieIcfgContainer [2024-11-23 23:33:01,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:33:01,064 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:33:01,064 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:33:01,072 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:33:01,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:32:59" (1/3) ... [2024-11-23 23:33:01,073 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d1b51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:33:01, skipping insertion in model container [2024-11-23 23:33:01,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:00" (2/3) ... [2024-11-23 23:33:01,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d1b51d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:33:01, skipping insertion in model container [2024-11-23 23:33:01,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:33:01" (3/3) ... [2024-11-23 23:33:01,075 INFO L128 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_4-2a.c.cil.c [2024-11-23 23:33:01,096 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:33:01,098 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_7+soft_float_4-2a.c.cil.c that has 4 procedures, 85 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-23 23:33:01,168 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:33:01,186 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;@12dad3cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:33:01,187 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-23 23:33:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 73 states have internal predecessors, (108), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-23 23:33:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-23 23:33:01,199 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:33:01,200 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:33:01,200 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:33:01,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:33:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1530844763, now seen corresponding path program 1 times [2024-11-23 23:33:01,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:33:01,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087222702] [2024-11-23 23:33:01,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:33:01,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:33:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:33:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:33:01,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:33:01,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087222702] [2024-11-23 23:33:01,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087222702] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:33:01,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:33:01,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:33:01,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061862633] [2024-11-23 23:33:01,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:33:01,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 23:33:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:33:01,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 23:33:01,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 23:33:01,387 INFO L87 Difference]: Start difference. First operand has 85 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 73 states have internal predecessors, (108), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:33:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:33:01,432 INFO L93 Difference]: Finished difference Result 165 states and 248 transitions. [2024-11-23 23:33:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 23:33:01,435 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-23 23:33:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:33:01,444 INFO L225 Difference]: With dead ends: 165 [2024-11-23 23:33:01,444 INFO L226 Difference]: Without dead ends: 78 [2024-11-23 23:33:01,448 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 23:33:01,452 INFO L435 NwaCegarLoop]: 114 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, 114 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 [2024-11-23 23:33:01,453 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:33:01,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-23 23:33:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-23 23:33:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 65 states have (on average 1.4) internal successors, (91), 67 states have internal predecessors, (91), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-23 23:33:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 106 transitions. [2024-11-23 23:33:01,536 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 106 transitions. Word has length 7 [2024-11-23 23:33:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:33:01,536 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 106 transitions. [2024-11-23 23:33:01,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:33:01,537 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 106 transitions. [2024-11-23 23:33:01,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-23 23:33:01,540 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:33:01,540 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:33:01,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:33:01,540 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:33:01,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:33:01,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1530904345, now seen corresponding path program 1 times [2024-11-23 23:33:01,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:33:01,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636352613] [2024-11-23 23:33:01,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:33:01,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:33:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 23:33:01,566 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-23 23:33:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 23:33:01,606 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-23 23:33:01,607 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-23 23:33:01,610 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-23 23:33:01,613 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-23 23:33:01,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:33:01,619 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-23 23:33:01,637 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-23 23:33:01,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 11:33:01 BoogieIcfgContainer [2024-11-23 23:33:01,644 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-23 23:33:01,645 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-23 23:33:01,645 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-23 23:33:01,645 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-23 23:33:01,650 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:33:01" (3/4) ... [2024-11-23 23:33:01,653 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-23 23:33:01,655 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-23 23:33:01,657 INFO L158 Benchmark]: Toolchain (without parser) took 1964.82ms. Allocated memory is still 117.4MB. Free memory was 92.9MB in the beginning and 86.6MB in the end (delta: 6.3MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2024-11-23 23:33:01,657 INFO L158 Benchmark]: CDTParser took 0.91ms. Allocated memory is still 117.4MB. Free memory is still 73.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 23:33:01,659 INFO L158 Benchmark]: CACSL2BoogieTranslator took 411.37ms. Allocated memory is still 117.4MB. Free memory was 92.6MB in the beginning and 78.5MB in the end (delta: 14.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-23 23:33:01,660 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.37ms. Allocated memory is still 117.4MB. Free memory was 78.5MB in the beginning and 77.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 23:33:01,660 INFO L158 Benchmark]: Boogie Preprocessor took 65.36ms. Allocated memory is still 117.4MB. Free memory was 77.2MB in the beginning and 75.3MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 23:33:01,661 INFO L158 Benchmark]: RCFGBuilder took 841.24ms. Allocated memory is still 117.4MB. Free memory was 75.0MB in the beginning and 55.4MB in the end (delta: 19.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-23 23:33:01,661 INFO L158 Benchmark]: TraceAbstraction took 579.84ms. Allocated memory is still 117.4MB. Free memory was 55.0MB in the beginning and 86.6MB in the end (delta: -31.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 23:33:01,661 INFO L158 Benchmark]: Witness Printer took 10.37ms. Allocated memory is still 117.4MB. Free memory was 86.6MB in the beginning and 86.6MB in the end (delta: 21.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 23:33:01,664 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91ms. Allocated memory is still 117.4MB. Free memory is still 73.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 411.37ms. Allocated memory is still 117.4MB. Free memory was 92.6MB in the beginning and 78.5MB in the end (delta: 14.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.37ms. Allocated memory is still 117.4MB. Free memory was 78.5MB in the beginning and 77.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 65.36ms. Allocated memory is still 117.4MB. Free memory was 77.2MB in the beginning and 75.3MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 841.24ms. Allocated memory is still 117.4MB. Free memory was 75.0MB in the beginning and 55.4MB in the end (delta: 19.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 579.84ms. Allocated memory is still 117.4MB. Free memory was 55.0MB in the beginning and 86.6MB in the end (delta: -31.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 10.37ms. Allocated memory is still 117.4MB. Free memory was 86.6MB in the beginning and 86.6MB in the end (delta: 21.1kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 48]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryFLOATComparisonOperation at line 40, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L310] COND TRUE __VERIFIER_nondet_int() [L311] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L47] COND TRUE !(result >= 0.0f && result < 1.4f) [L48] reach_error() - UnprovableResult [Line: 61]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 85 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 114 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 114 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-23 23:33:01,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/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 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:33:04,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:33:04,477 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-23 23:33:04,483 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:33:04,483 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:33:04,515 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:33:04,515 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:33:04,516 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:33:04,516 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:33:04,516 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:33:04,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:33:04,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:33:04,516 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:33:04,517 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:33:04,517 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:33:04,517 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:33:04,517 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 23:33:04,517 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:33:04,517 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:33:04,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:33:04,517 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 23:33:04,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:33:04,517 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 23:33:04,518 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:33:04,518 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-23 23:33:04,518 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-23 23:33:04,518 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:33:04,518 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 23:33:04,518 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:33:04,518 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:33:04,518 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:33:04,518 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:33:04,518 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:33:04,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:33:04,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:33:04,519 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:33:04,519 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:33:04,519 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:33:04,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:33:04,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:33:04,519 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:33:04,519 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:33:04,519 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 23:33:04,519 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 23:33:04,520 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-23 23:33:04,520 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-23 23:33:04,520 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:33:04,520 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:33:04,520 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:33:04,520 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:33:04,520 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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/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 -> 44a691d0c7049cc6934dd4c9eebe75a3ba34b64a09862ea689fabb3c0e0e6b0c [2024-11-23 23:33:04,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:33:04,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:33:04,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:33:04,891 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:33:04,891 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:33:04,892 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2024-11-23 23:33:07,886 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/data/2b90f8e91/240188eeefa2461bbf6ec854fe33369f/FLAG69ac8d5c1 [2024-11-23 23:33:08,216 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:33:08,218 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c [2024-11-23 23:33:08,229 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/data/2b90f8e91/240188eeefa2461bbf6ec854fe33369f/FLAG69ac8d5c1 [2024-11-23 23:33:08,252 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/data/2b90f8e91/240188eeefa2461bbf6ec854fe33369f [2024-11-23 23:33:08,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:33:08,257 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:33:08,260 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:33:08,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:33:08,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:33:08,266 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,267 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fc16ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08, skipping insertion in model container [2024-11-23 23:33:08,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,299 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:33:08,511 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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2024-11-23 23:33:08,517 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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2024-11-23 23:33:08,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:33:08,617 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:33:08,640 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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[1995,2008] [2024-11-23 23:33:08,642 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_d4f6c02f-5e33-4406-bf8d-4148a38a0856/sv-benchmarks/c/combinations/square_7+soft_float_4-2a.c.cil.c[2389,2402] [2024-11-23 23:33:08,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:33:08,722 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:33:08,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08 WrapperNode [2024-11-23 23:33:08,723 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:33:08,724 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:33:08,725 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:33:08,725 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:33:08,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,784 INFO L138 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-11-23 23:33:08,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:33:08,787 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:33:08,787 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:33:08,787 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:33:08,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,801 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,820 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]. [2024-11-23 23:33:08,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,821 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,838 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,839 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,850 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,852 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,861 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:33:08,865 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:33:08,865 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:33:08,865 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:33:08,866 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (1/1) ... [2024-11-23 23:33:08,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:33:08,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:33:08,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:33:08,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:33:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:33:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-23 23:33:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-23 23:33:08,959 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-23 23:33:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-23 23:33:08,960 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-23 23:33:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:33:08,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:33:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-23 23:33:08,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-23 23:33:09,059 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:33:09,061 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:33:13,728 INFO L? ?]: Removed 44 outVars from TransFormulas that were not future-live. [2024-11-23 23:33:13,729 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:33:13,746 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:33:13,746 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-23 23:33:13,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:33:13 BoogieIcfgContainer [2024-11-23 23:33:13,747 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:33:13,751 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:33:13,751 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:33:13,757 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:33:13,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:33:08" (1/3) ... [2024-11-23 23:33:13,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8cbb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:33:13, skipping insertion in model container [2024-11-23 23:33:13,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:33:08" (2/3) ... [2024-11-23 23:33:13,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8cbb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:33:13, skipping insertion in model container [2024-11-23 23:33:13,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:33:13" (3/3) ... [2024-11-23 23:33:13,761 INFO L128 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_4-2a.c.cil.c [2024-11-23 23:33:13,778 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:33:13,782 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_7+soft_float_4-2a.c.cil.c that has 4 procedures, 61 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-23 23:33:13,867 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:33:13,881 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;@42eba4b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:33:13,881 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-23 23:33:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 49 states have internal predecessors, (71), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-23 23:33:13,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-23 23:33:13,893 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:33:13,894 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:33:13,895 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:33:13,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:33:13,905 INFO L85 PathProgramCache]: Analyzing trace with hash 78502818, now seen corresponding path program 1 times [2024-11-23 23:33:13,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:33:13,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104170091] [2024-11-23 23:33:13,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:33:13,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-23 23:33:13,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/mathsat [2024-11-23 23:33:13,921 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-23 23:33:13,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-23 23:33:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:33:14,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-23 23:33:14,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:33:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:33:14,429 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:33:14,430 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:33:14,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104170091] [2024-11-23 23:33:14,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104170091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:33:14,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:33:14,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:33:14,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590223235] [2024-11-23 23:33:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:33:14,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 23:33:14,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:33:14,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 23:33:14,457 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 23:33:14,460 INFO L87 Difference]: Start difference. First operand has 61 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 49 states have internal predecessors, (71), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:33:14,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:33:14,498 INFO L93 Difference]: Finished difference Result 117 states and 174 transitions. [2024-11-23 23:33:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 23:33:14,501 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-23 23:33:14,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:33:14,510 INFO L225 Difference]: With dead ends: 117 [2024-11-23 23:33:14,511 INFO L226 Difference]: Without dead ends: 54 [2024-11-23 23:33:14,517 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 23:33:14,522 INFO L435 NwaCegarLoop]: 79 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, 79 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 [2024-11-23 23:33:14,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:33:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-23 23:33:14,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-23 23:33:14,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 43 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-23 23:33:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2024-11-23 23:33:14,573 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 7 [2024-11-23 23:33:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:33:14,574 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2024-11-23 23:33:14,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:33:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2024-11-23 23:33:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-23 23:33:14,575 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:33:14,575 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:33:14,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-11-23 23:33:14,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-23 23:33:14,776 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:33:14,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:33:14,777 INFO L85 PathProgramCache]: Analyzing trace with hash 78562400, now seen corresponding path program 1 times [2024-11-23 23:33:14,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:33:14,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612370295] [2024-11-23 23:33:14,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:33:14,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-23 23:33:14,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/mathsat [2024-11-23 23:33:14,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-23 23:33:14,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-23 23:37:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:12,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:37:12,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:37:21,393 WARN L286 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:37:29,503 WARN L286 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:37:37,722 WARN L286 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:37:41,818 WARN L851 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) |c_ULTIMATE.start_main1_~result~0#1|)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2024-11-23 23:37:58,175 WARN L286 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:38:06,395 WARN L286 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:38:14,510 WARN L286 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:38:26,783 WARN L286 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:38:34,992 WARN L286 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:38:43,115 WARN L286 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:38:47,222 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from false [2024-11-23 23:38:51,269 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from true [2024-11-23 23:38:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:38:51,270 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:38:51,271 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:38:51,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612370295] [2024-11-23 23:38:51,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612370295] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:51,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:38:51,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:38:51,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189213987] [2024-11-23 23:38:51,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:51,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:38:51,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:38:51,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:38:51,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-23 23:38:51,275 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:38:55,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:59,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-23 23:39:03,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-23 23:39:04,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:04,112 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2024-11-23 23:39:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:39:04,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-23 23:39:04,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:04,115 INFO L225 Difference]: With dead ends: 54 [2024-11-23 23:39:04,115 INFO L226 Difference]: Without dead ends: 49 [2024-11-23 23:39:04,115 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-23 23:39:04,116 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 65 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:04,117 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 166 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 3 Unknown, 142 Unchecked, 12.8s Time] [2024-11-23 23:39:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-23 23:39:04,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-23 23:39:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 38 states have internal predecessors, (51), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-23 23:39:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2024-11-23 23:39:04,127 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 7 [2024-11-23 23:39:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:04,127 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2024-11-23 23:39:04,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:39:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2024-11-23 23:39:04,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-23 23:39:04,129 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:04,129 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:04,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-23 23:39:04,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-23 23:39:04,330 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:04,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:04,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1357209922, now seen corresponding path program 1 times [2024-11-23 23:39:04,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:04,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208001409] [2024-11-23 23:39:04,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:04,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:04,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:04,335 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:04,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:39:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:04,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:39:04,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:39:05,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:39:06,005 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:06,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208001409] [2024-11-23 23:39:06,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208001409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:39:06,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:39:06,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-23 23:39:06,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729909791] [2024-11-23 23:39:06,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:39:06,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 23:39:06,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:06,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 23:39:06,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:39:06,008 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-23 23:39:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:07,144 INFO L93 Difference]: Finished difference Result 98 states and 134 transitions. [2024-11-23 23:39:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:39:07,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-11-23 23:39:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:07,149 INFO L225 Difference]: With dead ends: 98 [2024-11-23 23:39:07,149 INFO L226 Difference]: Without dead ends: 70 [2024-11-23 23:39:07,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:39:07,151 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 14 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:07,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 464 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-23 23:39:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-23 23:39:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2024-11-23 23:39:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.326086956521739) internal successors, (61), 48 states have internal predecessors, (61), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-23 23:39:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2024-11-23 23:39:07,165 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 32 [2024-11-23 23:39:07,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:07,165 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2024-11-23 23:39:07,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-23 23:39:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2024-11-23 23:39:07,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-23 23:39:07,167 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:07,167 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:07,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 23:39:07,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:07,368 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:07,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:07,368 INFO L85 PathProgramCache]: Analyzing trace with hash -569601816, now seen corresponding path program 1 times [2024-11-23 23:39:07,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:07,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126403229] [2024-11-23 23:39:07,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:07,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:07,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:07,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:07,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:39:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:07,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 23:39:07,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:39:09,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:39:10,577 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:10,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126403229] [2024-11-23 23:39:10,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126403229] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:39:10,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:39:10,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 16 [2024-11-23 23:39:10,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80351432] [2024-11-23 23:39:10,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:39:10,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:39:10,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:10,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:39:10,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:39:10,580 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-23 23:39:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:11,498 INFO L93 Difference]: Finished difference Result 126 states and 168 transitions. [2024-11-23 23:39:11,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:39:11,499 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-23 23:39:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:11,500 INFO L225 Difference]: With dead ends: 126 [2024-11-23 23:39:11,501 INFO L226 Difference]: Without dead ends: 94 [2024-11-23 23:39:11,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-23 23:39:11,502 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 24 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:11,503 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 486 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:39:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-23 23:39:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2024-11-23 23:39:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 67 states have internal predecessors, (84), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-23 23:39:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 115 transitions. [2024-11-23 23:39:11,520 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 115 transitions. Word has length 35 [2024-11-23 23:39:11,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:11,521 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 115 transitions. [2024-11-23 23:39:11,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-23 23:39:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 115 transitions. [2024-11-23 23:39:11,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-23 23:39:11,523 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:11,523 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:11,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 23:39:11,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:11,724 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:11,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash -512343514, now seen corresponding path program 1 times [2024-11-23 23:39:11,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:11,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708208534] [2024-11-23 23:39:11,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:11,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:11,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:11,728 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:11,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:39:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:11,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:39:11,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:39:12,507 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:39:12,507 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:12,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708208534] [2024-11-23 23:39:12,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708208534] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:39:12,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:39:12,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-23 23:39:12,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631908412] [2024-11-23 23:39:12,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:39:12,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:39:12,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:12,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:39:12,510 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:39:12,510 INFO L87 Difference]: Start difference. First operand 87 states and 115 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-23 23:39:13,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:13,181 INFO L93 Difference]: Finished difference Result 125 states and 164 transitions. [2024-11-23 23:39:13,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:39:13,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-23 23:39:13,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:13,183 INFO L225 Difference]: With dead ends: 125 [2024-11-23 23:39:13,184 INFO L226 Difference]: Without dead ends: 85 [2024-11-23 23:39:13,184 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:39:13,185 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 12 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:13,186 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 412 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-23 23:39:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-23 23:39:13,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2024-11-23 23:39:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 54 states have internal predecessors, (67), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-23 23:39:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2024-11-23 23:39:13,199 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 35 [2024-11-23 23:39:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:13,199 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2024-11-23 23:39:13,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-23 23:39:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2024-11-23 23:39:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-23 23:39:13,201 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:13,202 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:13,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 23:39:13,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:13,402 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:13,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:13,403 INFO L85 PathProgramCache]: Analyzing trace with hash -996850200, now seen corresponding path program 2 times [2024-11-23 23:39:13,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:13,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271523753] [2024-11-23 23:39:13,403 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:39:13,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:13,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:13,405 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:13,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:39:13,460 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 23:39:13,460 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:39:13,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 23:39:13,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 23:39:15,233 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:39:15,233 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:15,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271523753] [2024-11-23 23:39:15,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271523753] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:39:15,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:39:15,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-23 23:39:15,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175974765] [2024-11-23 23:39:15,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:39:15,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 23:39:15,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:15,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 23:39:15,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:39:15,236 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-23 23:39:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:17,955 INFO L93 Difference]: Finished difference Result 145 states and 191 transitions. [2024-11-23 23:39:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-23 23:39:17,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2024-11-23 23:39:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:17,958 INFO L225 Difference]: With dead ends: 145 [2024-11-23 23:39:17,958 INFO L226 Difference]: Without dead ends: 113 [2024-11-23 23:39:17,959 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-23 23:39:17,960 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 40 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:17,960 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 986 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-23 23:39:17,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-23 23:39:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2024-11-23 23:39:17,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 80 states have internal predecessors, (97), 15 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (22), 14 states have call predecessors, (22), 14 states have call successors, (22) [2024-11-23 23:39:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 134 transitions. [2024-11-23 23:39:17,981 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 134 transitions. Word has length 38 [2024-11-23 23:39:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:17,981 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 134 transitions. [2024-11-23 23:39:17,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-23 23:39:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 134 transitions. [2024-11-23 23:39:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-23 23:39:17,983 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:17,983 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:17,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 23:39:18,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:18,184 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:18,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:18,185 INFO L85 PathProgramCache]: Analyzing trace with hash 526581804, now seen corresponding path program 1 times [2024-11-23 23:39:18,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:18,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358150378] [2024-11-23 23:39:18,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:18,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:18,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:18,188 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:18,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:39:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:18,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:39:18,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:39:19,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:39:19,458 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:19,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358150378] [2024-11-23 23:39:19,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358150378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:39:19,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:39:19,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-23 23:39:19,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788129674] [2024-11-23 23:39:19,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:39:19,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:39:19,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:19,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:39:19,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:39:19,460 INFO L87 Difference]: Start difference. First operand 103 states and 134 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-23 23:39:20,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:20,328 INFO L93 Difference]: Finished difference Result 205 states and 269 transitions. [2024-11-23 23:39:20,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:39:20,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-11-23 23:39:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:20,332 INFO L225 Difference]: With dead ends: 205 [2024-11-23 23:39:20,333 INFO L226 Difference]: Without dead ends: 160 [2024-11-23 23:39:20,333 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:39:20,334 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 36 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:20,335 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 651 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:39:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-23 23:39:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 139. [2024-11-23 23:39:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 104 states have (on average 1.2596153846153846) internal successors, (131), 107 states have internal predecessors, (131), 22 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2024-11-23 23:39:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2024-11-23 23:39:20,367 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 38 [2024-11-23 23:39:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:20,367 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2024-11-23 23:39:20,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-23 23:39:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2024-11-23 23:39:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-23 23:39:20,369 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:20,369 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:20,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-23 23:39:20,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:20,570 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:20,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:20,571 INFO L85 PathProgramCache]: Analyzing trace with hash 583840106, now seen corresponding path program 1 times [2024-11-23 23:39:20,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:20,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049371429] [2024-11-23 23:39:20,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:20,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:20,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:20,573 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:20,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:39:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:20,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-23 23:39:20,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:39:22,028 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:25,311 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:25,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049371429] [2024-11-23 23:39:25,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049371429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:39:25,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1716599524] [2024-11-23 23:39:25,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:25,312 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-23 23:39:25,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-23 23:39:25,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-23 23:39:25,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-23 23:39:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:25,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-23 23:39:25,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:39:25,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:26,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1716599524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:39:26,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:39:26,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2024-11-23 23:39:26,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020882920] [2024-11-23 23:39:26,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:39:26,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:39:26,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:26,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:39:26,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-11-23 23:39:26,244 INFO L87 Difference]: Start difference. First operand 139 states and 184 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-23 23:39:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:28,452 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2024-11-23 23:39:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 23:39:28,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-11-23 23:39:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:28,455 INFO L225 Difference]: With dead ends: 170 [2024-11-23 23:39:28,455 INFO L226 Difference]: Without dead ends: 168 [2024-11-23 23:39:28,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-23 23:39:28,457 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 38 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:28,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 931 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-23 23:39:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-23 23:39:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 147. [2024-11-23 23:39:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 113 states have internal predecessors, (137), 22 states have call successors, (22), 12 states have call predecessors, (22), 14 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2024-11-23 23:39:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2024-11-23 23:39:28,485 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 38 [2024-11-23 23:39:28,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:28,485 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2024-11-23 23:39:28,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-23 23:39:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2024-11-23 23:39:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-23 23:39:28,487 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:28,488 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:28,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 23:39:28,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-11-23 23:39:28,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt [2024-11-23 23:39:28,889 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:28,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:28,889 INFO L85 PathProgramCache]: Analyzing trace with hash -728779408, now seen corresponding path program 1 times [2024-11-23 23:39:28,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:28,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305174576] [2024-11-23 23:39:28,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:28,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:28,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:28,892 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:28,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:39:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:28,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:39:28,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:39:29,635 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:39:29,635 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:29,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305174576] [2024-11-23 23:39:29,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305174576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:39:29,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:39:29,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:39:29,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170486374] [2024-11-23 23:39:29,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:39:29,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:39:29,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:29,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:39:29,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:39:29,637 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-23 23:39:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:30,471 INFO L93 Difference]: Finished difference Result 163 states and 207 transitions. [2024-11-23 23:39:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:39:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2024-11-23 23:39:30,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:30,478 INFO L225 Difference]: With dead ends: 163 [2024-11-23 23:39:30,478 INFO L226 Difference]: Without dead ends: 161 [2024-11-23 23:39:30,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:39:30,479 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 3 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:30,480 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 294 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:39:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-23 23:39:30,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 153. [2024-11-23 23:39:30,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 114 states have (on average 1.2456140350877194) internal successors, (142), 118 states have internal predecessors, (142), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (32), 21 states have call predecessors, (32), 22 states have call successors, (32) [2024-11-23 23:39:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2024-11-23 23:39:30,526 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 38 [2024-11-23 23:39:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:30,527 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2024-11-23 23:39:30,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-23 23:39:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2024-11-23 23:39:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-23 23:39:30,531 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:30,531 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:30,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 23:39:30,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:30,732 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:30,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash -671521106, now seen corresponding path program 1 times [2024-11-23 23:39:30,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:30,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527812801] [2024-11-23 23:39:30,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:30,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:30,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:30,735 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:30,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 23:39:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:30,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:39:30,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:39:31,496 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:39:31,496 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:31,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527812801] [2024-11-23 23:39:31,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527812801] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:39:31,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:39:31,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:39:31,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226566359] [2024-11-23 23:39:31,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:39:31,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:39:31,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:31,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:39:31,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:39:31,498 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-23 23:39:32,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:32,379 INFO L93 Difference]: Finished difference Result 159 states and 202 transitions. [2024-11-23 23:39:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:39:32,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2024-11-23 23:39:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:32,381 INFO L225 Difference]: With dead ends: 159 [2024-11-23 23:39:32,382 INFO L226 Difference]: Without dead ends: 157 [2024-11-23 23:39:32,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:39:32,383 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 3 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:32,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 289 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:39:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-23 23:39:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2024-11-23 23:39:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 113 states have (on average 1.238938053097345) internal successors, (140), 116 states have internal predecessors, (140), 22 states have call successors, (22), 13 states have call predecessors, (22), 15 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2024-11-23 23:39:32,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 193 transitions. [2024-11-23 23:39:32,403 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 193 transitions. Word has length 38 [2024-11-23 23:39:32,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:32,404 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 193 transitions. [2024-11-23 23:39:32,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-23 23:39:32,404 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 193 transitions. [2024-11-23 23:39:32,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-23 23:39:32,405 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:32,405 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:32,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-23 23:39:32,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:32,606 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:32,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:32,607 INFO L85 PathProgramCache]: Analyzing trace with hash -791479530, now seen corresponding path program 1 times [2024-11-23 23:39:32,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:32,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415036173] [2024-11-23 23:39:32,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:32,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:32,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:32,609 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:32,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 23:39:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:32,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:39:32,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:39:33,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:39:34,449 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:34,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415036173] [2024-11-23 23:39:34,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415036173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:39:34,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:39:34,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-11-23 23:39:34,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205131855] [2024-11-23 23:39:34,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:39:34,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 23:39:34,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:34,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 23:39:34,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:39:34,451 INFO L87 Difference]: Start difference. First operand 151 states and 193 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-23 23:39:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:35,288 INFO L93 Difference]: Finished difference Result 182 states and 232 transitions. [2024-11-23 23:39:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:39:35,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2024-11-23 23:39:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:35,291 INFO L225 Difference]: With dead ends: 182 [2024-11-23 23:39:35,291 INFO L226 Difference]: Without dead ends: 171 [2024-11-23 23:39:35,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:39:35,292 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 18 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:35,293 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 458 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-23 23:39:35,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-23 23:39:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 159. [2024-11-23 23:39:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 118 states have (on average 1.2372881355932204) internal successors, (146), 122 states have internal predecessors, (146), 24 states have call successors, (24), 13 states have call predecessors, (24), 16 states have return successors, (35), 23 states have call predecessors, (35), 23 states have call successors, (35) [2024-11-23 23:39:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 205 transitions. [2024-11-23 23:39:35,331 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 205 transitions. Word has length 45 [2024-11-23 23:39:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:35,332 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 205 transitions. [2024-11-23 23:39:35,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-23 23:39:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 205 transitions. [2024-11-23 23:39:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-23 23:39:35,335 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:35,335 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:35,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-23 23:39:35,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:35,540 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:35,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash -90414952, now seen corresponding path program 1 times [2024-11-23 23:39:35,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:35,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813180544] [2024-11-23 23:39:35,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:35,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:35,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:35,542 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:35,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 23:39:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:35,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-23 23:39:35,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:39:36,930 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:39:36,930 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:36,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813180544] [2024-11-23 23:39:36,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813180544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:39:36,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:39:36,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-23 23:39:36,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558087765] [2024-11-23 23:39:36,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:39:36,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:39:36,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:36,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:39:36,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:39:36,932 INFO L87 Difference]: Start difference. First operand 159 states and 205 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-23 23:39:39,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:39,456 INFO L93 Difference]: Finished difference Result 218 states and 284 transitions. [2024-11-23 23:39:39,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 23:39:39,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2024-11-23 23:39:39,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:39,460 INFO L225 Difference]: With dead ends: 218 [2024-11-23 23:39:39,460 INFO L226 Difference]: Without dead ends: 211 [2024-11-23 23:39:39,460 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:39:39,461 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 23 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:39,461 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 544 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-23 23:39:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-23 23:39:39,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 173. [2024-11-23 23:39:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 128 states have (on average 1.2265625) internal successors, (157), 132 states have internal predecessors, (157), 27 states have call successors, (27), 13 states have call predecessors, (27), 17 states have return successors, (42), 27 states have call predecessors, (42), 26 states have call successors, (42) [2024-11-23 23:39:39,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 226 transitions. [2024-11-23 23:39:39,490 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 226 transitions. Word has length 45 [2024-11-23 23:39:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:39,490 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 226 transitions. [2024-11-23 23:39:39,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-23 23:39:39,490 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 226 transitions. [2024-11-23 23:39:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-23 23:39:39,492 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:39,492 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:39,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-23 23:39:39,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:39,693 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:39,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:39,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1436794082, now seen corresponding path program 1 times [2024-11-23 23:39:39,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:39,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939336849] [2024-11-23 23:39:39,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:39,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:39,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:39,697 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:39,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 23:39:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:39,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-23 23:39:39,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:39:41,139 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:39:42,803 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:42,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939336849] [2024-11-23 23:39:42,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939336849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:39:42,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:39:42,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2024-11-23 23:39:42,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061185543] [2024-11-23 23:39:42,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:39:42,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:39:42,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:42,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:39:42,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:39:42,806 INFO L87 Difference]: Start difference. First operand 173 states and 226 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:39:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:45,253 INFO L93 Difference]: Finished difference Result 225 states and 292 transitions. [2024-11-23 23:39:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 23:39:45,254 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-11-23 23:39:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:45,256 INFO L225 Difference]: With dead ends: 225 [2024-11-23 23:39:45,256 INFO L226 Difference]: Without dead ends: 217 [2024-11-23 23:39:45,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:39:45,257 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:45,258 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 585 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-23 23:39:45,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-23 23:39:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 184. [2024-11-23 23:39:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 137 states have (on average 1.218978102189781) internal successors, (167), 140 states have internal predecessors, (167), 28 states have call successors, (28), 13 states have call predecessors, (28), 18 states have return successors, (44), 30 states have call predecessors, (44), 27 states have call successors, (44) [2024-11-23 23:39:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 239 transitions. [2024-11-23 23:39:45,283 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 239 transitions. Word has length 47 [2024-11-23 23:39:45,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:45,283 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 239 transitions. [2024-11-23 23:39:45,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:39:45,284 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 239 transitions. [2024-11-23 23:39:45,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-23 23:39:45,285 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:45,285 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:45,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 23:39:45,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:45,486 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:45,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:45,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1379535780, now seen corresponding path program 1 times [2024-11-23 23:39:45,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:45,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343255822] [2024-11-23 23:39:45,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:45,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:45,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:45,489 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:45,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 23:39:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:45,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:39:45,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 23:39:45,880 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:39:45,880 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:45,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343255822] [2024-11-23 23:39:45,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343255822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:39:45,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:39:45,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:39:45,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092397366] [2024-11-23 23:39:45,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:39:45,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:39:45,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:45,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:39:45,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:39:45,882 INFO L87 Difference]: Start difference. First operand 184 states and 239 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-23 23:39:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:46,233 INFO L93 Difference]: Finished difference Result 192 states and 246 transitions. [2024-11-23 23:39:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:39:46,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2024-11-23 23:39:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:46,236 INFO L225 Difference]: With dead ends: 192 [2024-11-23 23:39:46,236 INFO L226 Difference]: Without dead ends: 181 [2024-11-23 23:39:46,236 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:39:46,237 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 3 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:46,237 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 317 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 23:39:46,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-23 23:39:46,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-23 23:39:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 134 states have (on average 1.208955223880597) internal successors, (162), 138 states have internal predecessors, (162), 28 states have call successors, (28), 13 states have call predecessors, (28), 18 states have return successors, (43), 29 states have call predecessors, (43), 26 states have call successors, (43) [2024-11-23 23:39:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 233 transitions. [2024-11-23 23:39:46,260 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 233 transitions. Word has length 47 [2024-11-23 23:39:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:46,260 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 233 transitions. [2024-11-23 23:39:46,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-23 23:39:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 233 transitions. [2024-11-23 23:39:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-23 23:39:46,262 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:46,262 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:46,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-23 23:39:46,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:46,467 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:46,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1068772726, now seen corresponding path program 1 times [2024-11-23 23:39:46,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:46,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283466517] [2024-11-23 23:39:46,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:46,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:46,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:46,469 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:46,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 23:39:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:46,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 23:39:46,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:39:48,071 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:39:49,953 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:39:49,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283466517] [2024-11-23 23:39:49,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283466517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:39:49,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:39:49,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2024-11-23 23:39:49,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299066101] [2024-11-23 23:39:49,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:39:49,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:39:49,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:39:49,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:39:49,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:39:49,955 INFO L87 Difference]: Start difference. First operand 181 states and 233 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:39:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:39:55,574 INFO L93 Difference]: Finished difference Result 257 states and 341 transitions. [2024-11-23 23:39:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-23 23:39:55,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-11-23 23:39:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:39:55,577 INFO L225 Difference]: With dead ends: 257 [2024-11-23 23:39:55,577 INFO L226 Difference]: Without dead ends: 250 [2024-11-23 23:39:55,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:39:55,579 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 44 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:39:55,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 943 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-23 23:39:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-23 23:39:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 191. [2024-11-23 23:39:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 140 states have (on average 1.2) internal successors, (168), 146 states have internal predecessors, (168), 30 states have call successors, (30), 13 states have call predecessors, (30), 20 states have return successors, (49), 31 states have call predecessors, (49), 28 states have call successors, (49) [2024-11-23 23:39:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 247 transitions. [2024-11-23 23:39:55,620 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 247 transitions. Word has length 48 [2024-11-23 23:39:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:39:55,621 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 247 transitions. [2024-11-23 23:39:55,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:39:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 247 transitions. [2024-11-23 23:39:55,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-23 23:39:55,623 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:39:55,624 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:39:55,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-23 23:39:55,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:55,824 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:39:55,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:39:55,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1040574150, now seen corresponding path program 1 times [2024-11-23 23:39:55,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:39:55,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115748151] [2024-11-23 23:39:55,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:39:55,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:39:55,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:39:55,827 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:39:55,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 23:39:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:55,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 23:39:55,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:39:57,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:40:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:40:01,898 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:40:01,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115748151] [2024-11-23 23:40:01,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115748151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:40:01,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:40:01,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-23 23:40:01,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130915392] [2024-11-23 23:40:01,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:40:01,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-23 23:40:01,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:40:01,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-23 23:40:01,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-23 23:40:01,900 INFO L87 Difference]: Start difference. First operand 191 states and 247 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-23 23:40:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:40:11,366 INFO L93 Difference]: Finished difference Result 271 states and 371 transitions. [2024-11-23 23:40:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-23 23:40:11,368 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-23 23:40:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:40:11,370 INFO L225 Difference]: With dead ends: 271 [2024-11-23 23:40:11,370 INFO L226 Difference]: Without dead ends: 256 [2024-11-23 23:40:11,372 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2024-11-23 23:40:11,372 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 56 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:40:11,373 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1028 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-23 23:40:11,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-23 23:40:11,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 197. [2024-11-23 23:40:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 153 states have internal predecessors, (173), 30 states have call successors, (30), 13 states have call predecessors, (30), 22 states have return successors, (58), 30 states have call predecessors, (58), 28 states have call successors, (58) [2024-11-23 23:40:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 261 transitions. [2024-11-23 23:40:11,449 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 261 transitions. Word has length 48 [2024-11-23 23:40:11,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:40:11,450 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 261 transitions. [2024-11-23 23:40:11,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-23 23:40:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 261 transitions. [2024-11-23 23:40:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-23 23:40:11,454 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:40:11,455 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:40:11,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-23 23:40:11,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:40:11,656 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:40:11,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:40:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1222699312, now seen corresponding path program 2 times [2024-11-23 23:40:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:40:11,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216171963] [2024-11-23 23:40:11,657 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:40:11,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:40:11,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:40:11,660 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:40:11,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 23:40:11,724 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:40:11,724 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:40:11,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-23 23:40:11,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:40:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:40:13,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:40:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:40:14,678 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:40:14,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216171963] [2024-11-23 23:40:14,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216171963] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:40:14,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:40:14,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2024-11-23 23:40:14,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54625235] [2024-11-23 23:40:14,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:40:14,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:40:14,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:40:14,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:40:14,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:40:14,680 INFO L87 Difference]: Start difference. First operand 197 states and 261 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:40:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:40:19,842 INFO L93 Difference]: Finished difference Result 255 states and 355 transitions. [2024-11-23 23:40:19,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-23 23:40:19,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-11-23 23:40:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:40:19,845 INFO L225 Difference]: With dead ends: 255 [2024-11-23 23:40:19,845 INFO L226 Difference]: Without dead ends: 248 [2024-11-23 23:40:19,846 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:40:19,847 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 72 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:40:19,847 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 858 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-23 23:40:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-23 23:40:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 199. [2024-11-23 23:40:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 145 states have (on average 1.2) internal successors, (174), 154 states have internal predecessors, (174), 31 states have call successors, (31), 13 states have call predecessors, (31), 22 states have return successors, (59), 31 states have call predecessors, (59), 29 states have call successors, (59) [2024-11-23 23:40:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 264 transitions. [2024-11-23 23:40:19,886 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 264 transitions. Word has length 48 [2024-11-23 23:40:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:40:19,886 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 264 transitions. [2024-11-23 23:40:19,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:40:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 264 transitions. [2024-11-23 23:40:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-23 23:40:19,888 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:40:19,888 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:40:19,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-23 23:40:20,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:40:20,093 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:40:20,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:40:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash -488645562, now seen corresponding path program 1 times [2024-11-23 23:40:20,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:40:20,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108028073] [2024-11-23 23:40:20,093 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:40:20,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:40:20,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:40:20,095 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:40:20,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 23:40:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:40:20,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-23 23:40:20,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:40:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 23:40:22,708 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:40:22,709 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:40:22,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108028073] [2024-11-23 23:40:22,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108028073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:40:22,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:40:22,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-23 23:40:22,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655545295] [2024-11-23 23:40:22,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:40:22,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:40:22,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:40:22,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:40:22,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:40:22,710 INFO L87 Difference]: Start difference. First operand 199 states and 264 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-23 23:40:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:40:25,532 INFO L93 Difference]: Finished difference Result 298 states and 404 transitions. [2024-11-23 23:40:25,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 23:40:25,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2024-11-23 23:40:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:40:25,534 INFO L225 Difference]: With dead ends: 298 [2024-11-23 23:40:25,534 INFO L226 Difference]: Without dead ends: 239 [2024-11-23 23:40:25,535 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-23 23:40:25,536 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 32 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-23 23:40:25,536 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 880 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-23 23:40:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-23 23:40:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 218. [2024-11-23 23:40:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 159 states have (on average 1.1761006289308176) internal successors, (187), 168 states have internal predecessors, (187), 35 states have call successors, (35), 14 states have call predecessors, (35), 23 states have return successors, (63), 35 states have call predecessors, (63), 33 states have call successors, (63) [2024-11-23 23:40:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 285 transitions. [2024-11-23 23:40:25,580 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 285 transitions. Word has length 48 [2024-11-23 23:40:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:40:25,580 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 285 transitions. [2024-11-23 23:40:25,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-23 23:40:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 285 transitions. [2024-11-23 23:40:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-23 23:40:25,582 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:40:25,582 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:40:25,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-23 23:40:25,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:40:25,783 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:40:25,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:40:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1744006774, now seen corresponding path program 1 times [2024-11-23 23:40:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:40:25,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221405740] [2024-11-23 23:40:25,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:40:25,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:40:25,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:40:25,788 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:40:25,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-23 23:40:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:40:25,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 23:40:25,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:40:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:40:28,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:40:30,430 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:40:30,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221405740] [2024-11-23 23:40:30,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221405740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:40:30,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [635764671] [2024-11-23 23:40:30,430 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:40:30,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-23 23:40:30,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-23 23:40:30,433 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-23 23:40:30,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-11-23 23:40:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:40:30,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 23:40:30,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:40:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:40:31,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:40:33,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [635764671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:40:33,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:40:33,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2024-11-23 23:40:33,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141132538] [2024-11-23 23:40:33,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:40:33,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:40:33,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:40:33,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:40:33,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:40:33,230 INFO L87 Difference]: Start difference. First operand 218 states and 285 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-23 23:40:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:40:36,660 INFO L93 Difference]: Finished difference Result 290 states and 375 transitions. [2024-11-23 23:40:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-23 23:40:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2024-11-23 23:40:36,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:40:36,662 INFO L225 Difference]: With dead ends: 290 [2024-11-23 23:40:36,662 INFO L226 Difference]: Without dead ends: 238 [2024-11-23 23:40:36,662 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:40:36,663 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 38 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:40:36,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 907 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-23 23:40:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-23 23:40:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 224. [2024-11-23 23:40:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 164 states have (on average 1.1646341463414633) internal successors, (191), 173 states have internal predecessors, (191), 35 states have call successors, (35), 15 states have call predecessors, (35), 24 states have return successors, (63), 35 states have call predecessors, (63), 33 states have call successors, (63) [2024-11-23 23:40:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 289 transitions. [2024-11-23 23:40:36,706 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 289 transitions. Word has length 48 [2024-11-23 23:40:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:40:36,707 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 289 transitions. [2024-11-23 23:40:36,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-23 23:40:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 289 transitions. [2024-11-23 23:40:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-23 23:40:36,708 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:40:36,708 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:40:36,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-23 23:40:36,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2024-11-23 23:40:37,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt [2024-11-23 23:40:37,110 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:40:37,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:40:37,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1238443660, now seen corresponding path program 2 times [2024-11-23 23:40:37,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:40:37,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919496353] [2024-11-23 23:40:37,110 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:40:37,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:40:37,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:40:37,113 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:40:37,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-23 23:40:37,175 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:40:37,175 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:40:37,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 23:40:37,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:40:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:40:38,844 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:40:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:40:43,043 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:40:43,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919496353] [2024-11-23 23:40:43,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919496353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:40:43,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:40:43,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-23 23:40:43,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834440286] [2024-11-23 23:40:43,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:40:43,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-23 23:40:43,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:40:43,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-23 23:40:43,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-23 23:40:43,045 INFO L87 Difference]: Start difference. First operand 224 states and 289 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-23 23:40:52,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:40:52,177 INFO L93 Difference]: Finished difference Result 288 states and 385 transitions. [2024-11-23 23:40:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-23 23:40:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-23 23:40:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:40:52,181 INFO L225 Difference]: With dead ends: 288 [2024-11-23 23:40:52,181 INFO L226 Difference]: Without dead ends: 275 [2024-11-23 23:40:52,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-11-23 23:40:52,183 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 69 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:40:52,183 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1114 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-23 23:40:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-11-23 23:40:52,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 234. [2024-11-23 23:40:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 170 states have (on average 1.1588235294117648) internal successors, (197), 181 states have internal predecessors, (197), 37 states have call successors, (37), 15 states have call predecessors, (37), 26 states have return successors, (71), 37 states have call predecessors, (71), 35 states have call successors, (71) [2024-11-23 23:40:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 305 transitions. [2024-11-23 23:40:52,234 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 305 transitions. Word has length 48 [2024-11-23 23:40:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:40:52,234 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 305 transitions. [2024-11-23 23:40:52,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-23 23:40:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 305 transitions. [2024-11-23 23:40:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-23 23:40:52,235 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:40:52,235 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:40:52,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-23 23:40:52,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:40:52,436 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:40:52,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:40:52,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1928720180, now seen corresponding path program 1 times [2024-11-23 23:40:52,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:40:52,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556530479] [2024-11-23 23:40:52,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:40:52,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:40:52,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:40:52,439 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:40:52,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-23 23:40:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:40:52,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-23 23:40:52,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:40:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:40:54,861 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:40:54,862 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:40:54,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556530479] [2024-11-23 23:40:54,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556530479] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:40:54,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:40:54,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-23 23:40:54,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816228117] [2024-11-23 23:40:54,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:40:54,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:40:54,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:40:54,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:40:54,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:40:54,864 INFO L87 Difference]: Start difference. First operand 234 states and 305 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-23 23:40:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:40:59,143 INFO L93 Difference]: Finished difference Result 301 states and 394 transitions. [2024-11-23 23:40:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:40:59,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-11-23 23:40:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:40:59,145 INFO L225 Difference]: With dead ends: 301 [2024-11-23 23:40:59,145 INFO L226 Difference]: Without dead ends: 249 [2024-11-23 23:40:59,146 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-23 23:40:59,146 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 40 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:40:59,147 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 995 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-23 23:40:59,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-23 23:40:59,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 234. [2024-11-23 23:40:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 170 states have (on average 1.1529411764705881) internal successors, (196), 181 states have internal predecessors, (196), 37 states have call successors, (37), 15 states have call predecessors, (37), 26 states have return successors, (71), 37 states have call predecessors, (71), 35 states have call successors, (71) [2024-11-23 23:40:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 304 transitions. [2024-11-23 23:40:59,184 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 304 transitions. Word has length 48 [2024-11-23 23:40:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:40:59,185 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 304 transitions. [2024-11-23 23:40:59,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-23 23:40:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 304 transitions. [2024-11-23 23:40:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-23 23:40:59,187 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:40:59,187 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:40:59,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-23 23:40:59,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:40:59,388 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:40:59,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:40:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1347550551, now seen corresponding path program 1 times [2024-11-23 23:40:59,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:40:59,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640046606] [2024-11-23 23:40:59,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:40:59,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:40:59,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:40:59,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:40:59,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-23 23:40:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:40:59,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:40:59,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:41:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:41:00,275 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:41:00,275 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:41:00,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640046606] [2024-11-23 23:41:00,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640046606] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:41:00,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:41:00,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-23 23:41:00,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912244365] [2024-11-23 23:41:00,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:41:00,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 23:41:00,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:41:00,276 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 23:41:00,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:41:00,276 INFO L87 Difference]: Start difference. First operand 234 states and 304 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-23 23:41:01,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:41:01,274 INFO L93 Difference]: Finished difference Result 298 states and 379 transitions. [2024-11-23 23:41:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:41:01,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2024-11-23 23:41:01,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:41:01,277 INFO L225 Difference]: With dead ends: 298 [2024-11-23 23:41:01,277 INFO L226 Difference]: Without dead ends: 247 [2024-11-23 23:41:01,277 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:41:01,280 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 11 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:41:01,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 485 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:41:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-23 23:41:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 232. [2024-11-23 23:41:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 169 states have (on average 1.1538461538461537) internal successors, (195), 180 states have internal predecessors, (195), 36 states have call successors, (36), 15 states have call predecessors, (36), 26 states have return successors, (69), 36 states have call predecessors, (69), 34 states have call successors, (69) [2024-11-23 23:41:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 300 transitions. [2024-11-23 23:41:01,320 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 300 transitions. Word has length 50 [2024-11-23 23:41:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:41:01,320 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 300 transitions. [2024-11-23 23:41:01,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-23 23:41:01,321 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 300 transitions. [2024-11-23 23:41:01,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-23 23:41:01,322 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:41:01,322 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:41:01,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-23 23:41:01,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:41:01,523 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:41:01,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:41:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash 815133349, now seen corresponding path program 1 times [2024-11-23 23:41:01,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:41:01,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113151279] [2024-11-23 23:41:01,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:41:01,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:41:01,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:41:01,525 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:41:01,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-23 23:41:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:41:01,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 23:41:01,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:41:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 23:41:03,326 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:41:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:41:04,708 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:41:04,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113151279] [2024-11-23 23:41:04,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113151279] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:41:04,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:41:04,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 16 [2024-11-23 23:41:04,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339390816] [2024-11-23 23:41:04,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:41:04,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:41:04,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:41:04,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:41:04,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:41:04,710 INFO L87 Difference]: Start difference. First operand 232 states and 300 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-23 23:41:05,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:41:05,562 INFO L93 Difference]: Finished difference Result 304 states and 398 transitions. [2024-11-23 23:41:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:41:05,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2024-11-23 23:41:05,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:41:05,565 INFO L225 Difference]: With dead ends: 304 [2024-11-23 23:41:05,565 INFO L226 Difference]: Without dead ends: 268 [2024-11-23 23:41:05,565 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-23 23:41:05,566 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 22 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:41:05,566 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 473 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:41:05,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-11-23 23:41:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 253. [2024-11-23 23:41:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 184 states have (on average 1.1630434782608696) internal successors, (214), 195 states have internal predecessors, (214), 41 states have call successors, (41), 16 states have call predecessors, (41), 27 states have return successors, (72), 41 states have call predecessors, (72), 38 states have call successors, (72) [2024-11-23 23:41:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 327 transitions. [2024-11-23 23:41:05,617 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 327 transitions. Word has length 53 [2024-11-23 23:41:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:41:05,618 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 327 transitions. [2024-11-23 23:41:05,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-23 23:41:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 327 transitions. [2024-11-23 23:41:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-23 23:41:05,619 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:41:05,619 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:41:05,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-23 23:41:05,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:41:05,820 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:41:05,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:41:05,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1100274711, now seen corresponding path program 1 times [2024-11-23 23:41:05,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:41:05,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256950940] [2024-11-23 23:41:05,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:41:05,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:41:05,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:41:05,822 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:41:05,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-23 23:41:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:41:05,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:41:05,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:41:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:41:06,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:41:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:41:07,077 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:41:07,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256950940] [2024-11-23 23:41:07,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256950940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:41:07,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:41:07,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-23 23:41:07,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367728750] [2024-11-23 23:41:07,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:41:07,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:41:07,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:41:07,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:41:07,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:41:07,079 INFO L87 Difference]: Start difference. First operand 253 states and 327 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:41:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:41:07,639 INFO L93 Difference]: Finished difference Result 317 states and 397 transitions. [2024-11-23 23:41:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:41:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 53 [2024-11-23 23:41:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:41:07,642 INFO L225 Difference]: With dead ends: 317 [2024-11-23 23:41:07,642 INFO L226 Difference]: Without dead ends: 231 [2024-11-23 23:41:07,643 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:41:07,645 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 6 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:41:07,645 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 439 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 23:41:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-23 23:41:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2024-11-23 23:41:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 169 states have (on average 1.1715976331360947) internal successors, (198), 180 states have internal predecessors, (198), 36 states have call successors, (36), 14 states have call predecessors, (36), 25 states have return successors, (67), 36 states have call predecessors, (67), 35 states have call successors, (67) [2024-11-23 23:41:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 301 transitions. [2024-11-23 23:41:07,690 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 301 transitions. Word has length 53 [2024-11-23 23:41:07,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:41:07,690 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 301 transitions. [2024-11-23 23:41:07,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:41:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 301 transitions. [2024-11-23 23:41:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-23 23:41:07,699 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:41:07,699 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:41:07,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-23 23:41:07,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:41:07,903 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:41:07,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:41:07,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1110885904, now seen corresponding path program 1 times [2024-11-23 23:41:07,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:41:07,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652381095] [2024-11-23 23:41:07,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:41:07,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:41:07,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:41:07,907 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:41:07,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-23 23:41:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:41:07,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-23 23:41:07,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:41:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:41:09,587 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:41:11,110 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:41:11,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652381095] [2024-11-23 23:41:11,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652381095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:41:11,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [367838231] [2024-11-23 23:41:11,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:41:11,111 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-23 23:41:11,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-23 23:41:11,113 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-23 23:41:11,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-23 23:41:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:41:11,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:41:11,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:41:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:41:11,828 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:41:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [367838231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:41:11,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:41:11,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-23 23:41:11,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899757520] [2024-11-23 23:41:11,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:41:11,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:41:11,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:41:11,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:41:11,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:41:11,830 INFO L87 Difference]: Start difference. First operand 231 states and 301 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-23 23:41:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:41:12,950 INFO L93 Difference]: Finished difference Result 265 states and 349 transitions. [2024-11-23 23:41:12,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:41:12,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-11-23 23:41:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:41:12,952 INFO L225 Difference]: With dead ends: 265 [2024-11-23 23:41:12,952 INFO L226 Difference]: Without dead ends: 263 [2024-11-23 23:41:12,953 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:41:12,953 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 10 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:41:12,953 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 302 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-23 23:41:12,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-23 23:41:13,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 237. [2024-11-23 23:41:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 172 states have (on average 1.1686046511627908) internal successors, (201), 185 states have internal predecessors, (201), 38 states have call successors, (38), 15 states have call predecessors, (38), 26 states have return successors, (69), 36 states have call predecessors, (69), 37 states have call successors, (69) [2024-11-23 23:41:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 308 transitions. [2024-11-23 23:41:13,007 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 308 transitions. Word has length 48 [2024-11-23 23:41:13,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:41:13,007 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 308 transitions. [2024-11-23 23:41:13,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-23 23:41:13,008 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 308 transitions. [2024-11-23 23:41:13,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-23 23:41:13,009 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:41:13,010 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:41:13,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2024-11-23 23:41:13,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-23 23:41:13,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:41:13,411 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:41:13,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:41:13,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1800794983, now seen corresponding path program 1 times [2024-11-23 23:41:13,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:41:13,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097640815] [2024-11-23 23:41:13,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:41:13,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:41:13,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:41:13,413 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:41:13,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-23 23:41:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:41:13,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:41:13,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:41:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 23:41:14,407 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:41:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 23:41:16,025 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:41:16,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097640815] [2024-11-23 23:41:16,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097640815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:41:16,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:41:16,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-23 23:41:16,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169978372] [2024-11-23 23:41:16,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:41:16,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 23:41:16,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:41:16,027 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 23:41:16,027 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:41:16,027 INFO L87 Difference]: Start difference. First operand 237 states and 308 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-23 23:41:17,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:41:17,597 INFO L93 Difference]: Finished difference Result 322 states and 405 transitions. [2024-11-23 23:41:17,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:41:17,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 49 [2024-11-23 23:41:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:41:17,600 INFO L225 Difference]: With dead ends: 322 [2024-11-23 23:41:17,600 INFO L226 Difference]: Without dead ends: 243 [2024-11-23 23:41:17,601 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:41:17,601 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 39 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:41:17,602 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 773 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-23 23:41:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-11-23 23:41:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 225. [2024-11-23 23:41:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 165 states have (on average 1.1636363636363636) internal successors, (192), 176 states have internal predecessors, (192), 35 states have call successors, (35), 15 states have call predecessors, (35), 24 states have return successors, (64), 33 states have call predecessors, (64), 34 states have call successors, (64) [2024-11-23 23:41:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 291 transitions. [2024-11-23 23:41:17,649 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 291 transitions. Word has length 49 [2024-11-23 23:41:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:41:17,649 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 291 transitions. [2024-11-23 23:41:17,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-23 23:41:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 291 transitions. [2024-11-23 23:41:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-23 23:41:17,650 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:41:17,650 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:41:17,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-23 23:41:17,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:41:17,851 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:41:17,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:41:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash 108154785, now seen corresponding path program 1 times [2024-11-23 23:41:17,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:41:17,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573659343] [2024-11-23 23:41:17,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:41:17,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:41:17,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:41:17,853 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:41:17,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-23 23:41:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:41:17,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:41:17,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:41:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:41:18,938 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:41:18,938 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:41:18,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573659343] [2024-11-23 23:41:18,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573659343] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:41:18,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:41:18,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-23 23:41:18,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423057596] [2024-11-23 23:41:18,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:41:18,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 23:41:18,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:41:18,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 23:41:18,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:41:18,939 INFO L87 Difference]: Start difference. First operand 225 states and 291 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-23 23:41:20,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:41:20,658 INFO L93 Difference]: Finished difference Result 274 states and 343 transitions. [2024-11-23 23:41:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:41:20,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-23 23:41:20,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:41:20,660 INFO L225 Difference]: With dead ends: 274 [2024-11-23 23:41:20,660 INFO L226 Difference]: Without dead ends: 229 [2024-11-23 23:41:20,661 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:41:20,662 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 34 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:41:20,662 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 667 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-23 23:41:20,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-23 23:41:20,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 218. [2024-11-23 23:41:20,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 161 states have (on average 1.1614906832298137) internal successors, (187), 171 states have internal predecessors, (187), 33 states have call successors, (33), 15 states have call predecessors, (33), 23 states have return successors, (60), 31 states have call predecessors, (60), 32 states have call successors, (60) [2024-11-23 23:41:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 280 transitions. [2024-11-23 23:41:20,699 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 280 transitions. Word has length 49 [2024-11-23 23:41:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:41:20,699 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 280 transitions. [2024-11-23 23:41:20,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-23 23:41:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 280 transitions. [2024-11-23 23:41:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-23 23:41:20,703 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:41:20,703 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:41:20,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-23 23:41:20,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:41:20,903 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:41:20,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:41:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash -153337123, now seen corresponding path program 1 times [2024-11-23 23:41:20,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:41:20,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574447114] [2024-11-23 23:41:20,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:41:20,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:41:20,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:41:20,906 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:41:20,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-23 23:41:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:41:20,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-23 23:41:20,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:41:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:41:31,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:41:32,918 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:41:32,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574447114] [2024-11-23 23:41:32,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574447114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:41:32,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1772296063] [2024-11-23 23:41:32,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:41:32,919 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-23 23:41:32,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-23 23:41:32,920 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-23 23:41:32,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-11-23 23:41:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:41:33,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:41:33,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:41:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:41:33,512 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:41:33,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1772296063] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:41:33,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:41:33,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-23 23:41:33,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676325984] [2024-11-23 23:41:33,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:41:33,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:41:33,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:41:33,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:41:33,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2024-11-23 23:41:33,513 INFO L87 Difference]: Start difference. First operand 218 states and 280 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-23 23:41:37,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-23 23:41:41,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-23 23:41:45,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-23 23:41:49,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-23 23:41:53,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-23 23:41:57,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-23 23:42:02,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-23 23:42:06,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-23 23:42:07,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-23 23:42:08,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:42:08,530 INFO L93 Difference]: Finished difference Result 247 states and 318 transitions. [2024-11-23 23:42:08,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:42:08,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-23 23:42:08,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:42:08,533 INFO L225 Difference]: With dead ends: 247 [2024-11-23 23:42:08,533 INFO L226 Difference]: Without dead ends: 243 [2024-11-23 23:42:08,533 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=53, Invalid=185, Unknown=2, NotChecked=0, Total=240 [2024-11-23 23:42:08,534 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 8 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:42:08,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 354 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 34.8s Time] [2024-11-23 23:42:08,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-11-23 23:42:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 220. [2024-11-23 23:42:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 163 states have (on average 1.1533742331288344) internal successors, (188), 172 states have internal predecessors, (188), 33 states have call successors, (33), 16 states have call predecessors, (33), 23 states have return successors, (60), 31 states have call predecessors, (60), 32 states have call successors, (60) [2024-11-23 23:42:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 281 transitions. [2024-11-23 23:42:08,583 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 281 transitions. Word has length 49 [2024-11-23 23:42:08,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:42:08,583 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 281 transitions. [2024-11-23 23:42:08,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-23 23:42:08,583 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 281 transitions. [2024-11-23 23:42:08,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-23 23:42:08,584 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:42:08,585 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:42:08,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-23 23:42:08,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2024-11-23 23:42:08,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt [2024-11-23 23:42:08,985 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:42:08,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:42:08,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1453789880, now seen corresponding path program 1 times [2024-11-23 23:42:08,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:42:08,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453188325] [2024-11-23 23:42:08,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:42:08,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:08,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:42:08,988 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:42:08,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-23 23:42:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:42:09,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:42:09,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:42:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:42:09,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:42:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:42:11,204 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:42:11,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453188325] [2024-11-23 23:42:11,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453188325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:42:11,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:42:11,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-23 23:42:11,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880230151] [2024-11-23 23:42:11,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:42:11,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:42:11,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:42:11,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:42:11,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:42:11,206 INFO L87 Difference]: Start difference. First operand 220 states and 281 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:42:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:42:12,091 INFO L93 Difference]: Finished difference Result 247 states and 314 transitions. [2024-11-23 23:42:12,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:42:12,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2024-11-23 23:42:12,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:42:12,093 INFO L225 Difference]: With dead ends: 247 [2024-11-23 23:42:12,093 INFO L226 Difference]: Without dead ends: 234 [2024-11-23 23:42:12,093 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:42:12,094 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:42:12,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 513 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-23 23:42:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-23 23:42:12,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 223. [2024-11-23 23:42:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 165 states have (on average 1.1515151515151516) internal successors, (190), 175 states have internal predecessors, (190), 33 states have call successors, (33), 16 states have call predecessors, (33), 24 states have return successors, (63), 31 states have call predecessors, (63), 32 states have call successors, (63) [2024-11-23 23:42:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 286 transitions. [2024-11-23 23:42:12,138 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 286 transitions. Word has length 50 [2024-11-23 23:42:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:42:12,138 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 286 transitions. [2024-11-23 23:42:12,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:42:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 286 transitions. [2024-11-23 23:42:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-23 23:42:12,139 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:42:12,139 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:42:12,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-23 23:42:12,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:12,340 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:42:12,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:42:12,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1472593412, now seen corresponding path program 1 times [2024-11-23 23:42:12,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:42:12,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315780648] [2024-11-23 23:42:12,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:42:12,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:12,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:42:12,343 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:42:12,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-23 23:42:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:42:12,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:42:12,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:42:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:42:13,500 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:42:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:42:15,639 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:42:15,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315780648] [2024-11-23 23:42:15,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315780648] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:42:15,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:42:15,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-23 23:42:15,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661840554] [2024-11-23 23:42:15,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:42:15,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:42:15,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:42:15,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:42:15,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:42:15,641 INFO L87 Difference]: Start difference. First operand 223 states and 286 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-23 23:42:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:42:18,272 INFO L93 Difference]: Finished difference Result 266 states and 348 transitions. [2024-11-23 23:42:18,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:42:18,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2024-11-23 23:42:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:42:18,275 INFO L225 Difference]: With dead ends: 266 [2024-11-23 23:42:18,275 INFO L226 Difference]: Without dead ends: 241 [2024-11-23 23:42:18,275 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:42:18,276 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 18 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:42:18,276 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 613 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-23 23:42:18,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-11-23 23:42:18,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 215. [2024-11-23 23:42:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 158 states have (on average 1.1582278481012658) internal successors, (183), 170 states have internal predecessors, (183), 32 states have call successors, (32), 14 states have call predecessors, (32), 24 states have return successors, (63), 30 states have call predecessors, (63), 31 states have call successors, (63) [2024-11-23 23:42:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 278 transitions. [2024-11-23 23:42:18,324 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 278 transitions. Word has length 50 [2024-11-23 23:42:18,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:42:18,324 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 278 transitions. [2024-11-23 23:42:18,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-23 23:42:18,324 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 278 transitions. [2024-11-23 23:42:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-23 23:42:18,325 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:42:18,325 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:42:18,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-23 23:42:18,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:18,530 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:42:18,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:42:18,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1942137556, now seen corresponding path program 1 times [2024-11-23 23:42:18,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:42:18,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027154197] [2024-11-23 23:42:18,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:42:18,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:18,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:42:18,533 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:42:18,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-23 23:42:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:42:18,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:42:18,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:42:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:42:19,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:42:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:42:20,423 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:42:20,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027154197] [2024-11-23 23:42:20,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027154197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:42:20,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:42:20,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-23 23:42:20,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362098324] [2024-11-23 23:42:20,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:42:20,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:42:20,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:42:20,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:42:20,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:42:20,425 INFO L87 Difference]: Start difference. First operand 215 states and 278 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-23 23:42:22,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:42:22,288 INFO L93 Difference]: Finished difference Result 255 states and 345 transitions. [2024-11-23 23:42:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:42:22,289 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2024-11-23 23:42:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:42:22,290 INFO L225 Difference]: With dead ends: 255 [2024-11-23 23:42:22,290 INFO L226 Difference]: Without dead ends: 237 [2024-11-23 23:42:22,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:42:22,291 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 41 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:42:22,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 538 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-23 23:42:22,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-23 23:42:22,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 218. [2024-11-23 23:42:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 160 states have (on average 1.15) internal successors, (184), 173 states have internal predecessors, (184), 32 states have call successors, (32), 14 states have call predecessors, (32), 25 states have return successors, (67), 30 states have call predecessors, (67), 31 states have call successors, (67) [2024-11-23 23:42:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 283 transitions. [2024-11-23 23:42:22,340 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 283 transitions. Word has length 53 [2024-11-23 23:42:22,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:42:22,341 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 283 transitions. [2024-11-23 23:42:22,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-23 23:42:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 283 transitions. [2024-11-23 23:42:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-23 23:42:22,342 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:42:22,342 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:42:22,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-23 23:42:22,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:22,543 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:42:22,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:42:22,543 INFO L85 PathProgramCache]: Analyzing trace with hash 822896616, now seen corresponding path program 1 times [2024-11-23 23:42:22,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:42:22,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260395638] [2024-11-23 23:42:22,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:42:22,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:22,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:42:22,545 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:42:22,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-23 23:42:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:42:22,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 23:42:22,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:42:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 23:42:24,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:42:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 23:42:27,208 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:42:27,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260395638] [2024-11-23 23:42:27,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260395638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:42:27,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:42:27,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-23 23:42:27,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099825020] [2024-11-23 23:42:27,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:42:27,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 23:42:27,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:42:27,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 23:42:27,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:42:27,210 INFO L87 Difference]: Start difference. First operand 218 states and 283 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-23 23:42:29,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:42:29,235 INFO L93 Difference]: Finished difference Result 258 states and 343 transitions. [2024-11-23 23:42:29,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 23:42:29,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 62 [2024-11-23 23:42:29,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:42:29,238 INFO L225 Difference]: With dead ends: 258 [2024-11-23 23:42:29,238 INFO L226 Difference]: Without dead ends: 249 [2024-11-23 23:42:29,238 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-23 23:42:29,239 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 24 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:42:29,239 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 861 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-23 23:42:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-23 23:42:29,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 234. [2024-11-23 23:42:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 170 states have (on average 1.1529411764705881) internal successors, (196), 187 states have internal predecessors, (196), 35 states have call successors, (35), 14 states have call predecessors, (35), 28 states have return successors, (86), 32 states have call predecessors, (86), 34 states have call successors, (86) [2024-11-23 23:42:29,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 317 transitions. [2024-11-23 23:42:29,299 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 317 transitions. Word has length 62 [2024-11-23 23:42:29,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:42:29,300 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 317 transitions. [2024-11-23 23:42:29,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-23 23:42:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 317 transitions. [2024-11-23 23:42:29,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-23 23:42:29,301 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:42:29,301 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:42:29,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-23 23:42:29,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:29,502 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:42:29,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:42:29,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1558668195, now seen corresponding path program 1 times [2024-11-23 23:42:29,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:42:29,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099537502] [2024-11-23 23:42:29,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:42:29,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:29,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:42:29,504 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:42:29,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-23 23:42:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:42:29,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:42:29,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:42:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:42:30,423 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:42:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:42:31,808 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:42:31,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099537502] [2024-11-23 23:42:31,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099537502] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:42:31,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:42:31,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-23 23:42:31,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940394730] [2024-11-23 23:42:31,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:42:31,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:42:31,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:42:31,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:42:31,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:42:31,810 INFO L87 Difference]: Start difference. First operand 234 states and 317 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:42:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:42:32,895 INFO L93 Difference]: Finished difference Result 252 states and 340 transitions. [2024-11-23 23:42:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:42:32,895 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 62 [2024-11-23 23:42:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:42:32,897 INFO L225 Difference]: With dead ends: 252 [2024-11-23 23:42:32,897 INFO L226 Difference]: Without dead ends: 234 [2024-11-23 23:42:32,898 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:42:32,899 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 29 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:42:32,899 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 299 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:42:32,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-23 23:42:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 218. [2024-11-23 23:42:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 160 states have (on average 1.14375) internal successors, (183), 173 states have internal predecessors, (183), 32 states have call successors, (32), 14 states have call predecessors, (32), 25 states have return successors, (66), 30 states have call predecessors, (66), 31 states have call successors, (66) [2024-11-23 23:42:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 281 transitions. [2024-11-23 23:42:32,942 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 281 transitions. Word has length 62 [2024-11-23 23:42:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:42:32,943 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 281 transitions. [2024-11-23 23:42:32,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:42:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 281 transitions. [2024-11-23 23:42:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-23 23:42:32,944 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:42:32,944 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:42:32,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-23 23:42:33,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:33,144 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:42:33,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:42:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1553464034, now seen corresponding path program 1 times [2024-11-23 23:42:33,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:42:33,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518993071] [2024-11-23 23:42:33,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:42:33,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:33,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:42:33,147 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:42:33,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-23 23:42:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:42:33,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 23:42:33,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:42:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:42:34,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:42:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:42:38,032 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:42:38,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518993071] [2024-11-23 23:42:38,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518993071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:42:38,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:42:38,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-23 23:42:38,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196033078] [2024-11-23 23:42:38,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:42:38,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-23 23:42:38,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:42:38,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-23 23:42:38,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2024-11-23 23:42:38,034 INFO L87 Difference]: Start difference. First operand 218 states and 281 transitions. Second operand has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-23 23:42:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:42:46,987 INFO L93 Difference]: Finished difference Result 255 states and 335 transitions. [2024-11-23 23:42:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-23 23:42:46,988 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 62 [2024-11-23 23:42:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:42:46,990 INFO L225 Difference]: With dead ends: 255 [2024-11-23 23:42:46,990 INFO L226 Difference]: Without dead ends: 246 [2024-11-23 23:42:46,991 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2024-11-23 23:42:46,991 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 114 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:42:46,991 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 843 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-23 23:42:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-11-23 23:42:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 218. [2024-11-23 23:42:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 160 states have (on average 1.14375) internal successors, (183), 173 states have internal predecessors, (183), 32 states have call successors, (32), 14 states have call predecessors, (32), 25 states have return successors, (65), 30 states have call predecessors, (65), 31 states have call successors, (65) [2024-11-23 23:42:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 280 transitions. [2024-11-23 23:42:47,043 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 280 transitions. Word has length 62 [2024-11-23 23:42:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:42:47,043 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 280 transitions. [2024-11-23 23:42:47,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-23 23:42:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 280 transitions. [2024-11-23 23:42:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-23 23:42:47,045 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:42:47,045 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:42:47,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-23 23:42:47,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:47,245 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:42:47,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:42:47,246 INFO L85 PathProgramCache]: Analyzing trace with hash -12618729, now seen corresponding path program 1 times [2024-11-23 23:42:47,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:42:47,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655867813] [2024-11-23 23:42:47,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:42:47,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:47,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:42:47,248 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:42:47,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-23 23:42:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:42:47,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:42:47,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:42:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:42:48,159 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:42:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:42:49,442 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:42:49,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655867813] [2024-11-23 23:42:49,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655867813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:42:49,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:42:49,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-23 23:42:49,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181703817] [2024-11-23 23:42:49,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:42:49,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:42:49,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:42:49,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:42:49,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:42:49,443 INFO L87 Difference]: Start difference. First operand 218 states and 280 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:42:50,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:42:50,651 INFO L93 Difference]: Finished difference Result 245 states and 323 transitions. [2024-11-23 23:42:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:42:50,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2024-11-23 23:42:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:42:50,653 INFO L225 Difference]: With dead ends: 245 [2024-11-23 23:42:50,654 INFO L226 Difference]: Without dead ends: 231 [2024-11-23 23:42:50,654 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:42:50,654 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 52 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:42:50,655 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 339 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:42:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-23 23:42:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 215. [2024-11-23 23:42:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 158 states have (on average 1.139240506329114) internal successors, (180), 170 states have internal predecessors, (180), 32 states have call successors, (32), 14 states have call predecessors, (32), 24 states have return successors, (62), 30 states have call predecessors, (62), 31 states have call successors, (62) [2024-11-23 23:42:50,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 274 transitions. [2024-11-23 23:42:50,708 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 274 transitions. Word has length 64 [2024-11-23 23:42:50,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:42:50,708 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 274 transitions. [2024-11-23 23:42:50,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:42:50,708 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 274 transitions. [2024-11-23 23:42:50,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-23 23:42:50,709 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:42:50,710 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:42:50,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-23 23:42:50,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:50,910 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:42:50,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:42:50,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1211120731, now seen corresponding path program 2 times [2024-11-23 23:42:50,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:42:50,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195611830] [2024-11-23 23:42:50,916 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:42:50,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:50,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:42:50,919 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:42:50,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-23 23:42:50,991 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:42:50,991 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:42:50,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:42:50,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:42:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:42:51,838 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:42:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:42:53,295 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:42:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195611830] [2024-11-23 23:42:53,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195611830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:42:53,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:42:53,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-23 23:42:53,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837852746] [2024-11-23 23:42:53,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:42:53,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:42:53,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:42:53,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:42:53,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:42:53,297 INFO L87 Difference]: Start difference. First operand 215 states and 274 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:42:54,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:42:54,231 INFO L93 Difference]: Finished difference Result 242 states and 317 transitions. [2024-11-23 23:42:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:42:54,232 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2024-11-23 23:42:54,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:42:54,233 INFO L225 Difference]: With dead ends: 242 [2024-11-23 23:42:54,233 INFO L226 Difference]: Without dead ends: 225 [2024-11-23 23:42:54,234 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:42:54,234 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 35 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:42:54,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 287 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-23 23:42:54,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-23 23:42:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 204. [2024-11-23 23:42:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 160 states have internal predecessors, (171), 31 states have call successors, (31), 14 states have call predecessors, (31), 21 states have return successors, (56), 29 states have call predecessors, (56), 30 states have call successors, (56) [2024-11-23 23:42:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 258 transitions. [2024-11-23 23:42:54,288 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 258 transitions. Word has length 64 [2024-11-23 23:42:54,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:42:54,289 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 258 transitions. [2024-11-23 23:42:54,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:42:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 258 transitions. [2024-11-23 23:42:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-23 23:42:54,292 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:42:54,292 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:42:54,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-23 23:42:54,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:54,496 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:42:54,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:42:54,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1698788290, now seen corresponding path program 1 times [2024-11-23 23:42:54,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:42:54,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302892620] [2024-11-23 23:42:54,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:42:54,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:42:54,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:42:54,498 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:42:54,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-23 23:42:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:42:54,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 23:42:54,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:42:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:42:56,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:42:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:42:58,632 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:42:58,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302892620] [2024-11-23 23:42:58,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302892620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:42:58,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:42:58,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2024-11-23 23:42:58,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533301385] [2024-11-23 23:42:58,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:42:58,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:42:58,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:42:58,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:42:58,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:42:58,633 INFO L87 Difference]: Start difference. First operand 204 states and 258 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 14 states have internal predecessors, (56), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-23 23:43:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:43:02,175 INFO L93 Difference]: Finished difference Result 227 states and 281 transitions. [2024-11-23 23:43:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:43:02,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 14 states have internal predecessors, (56), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 71 [2024-11-23 23:43:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:43:02,177 INFO L225 Difference]: With dead ends: 227 [2024-11-23 23:43:02,177 INFO L226 Difference]: Without dead ends: 215 [2024-11-23 23:43:02,178 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:43:02,178 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 18 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:43:02,179 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 840 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-23 23:43:02,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-23 23:43:02,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 199. [2024-11-23 23:43:02,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 148 states have (on average 1.1283783783783783) internal successors, (167), 156 states have internal predecessors, (167), 30 states have call successors, (30), 14 states have call predecessors, (30), 20 states have return successors, (49), 28 states have call predecessors, (49), 29 states have call successors, (49) [2024-11-23 23:43:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 246 transitions. [2024-11-23 23:43:02,221 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 246 transitions. Word has length 71 [2024-11-23 23:43:02,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:43:02,221 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 246 transitions. [2024-11-23 23:43:02,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 14 states have internal predecessors, (56), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-23 23:43:02,221 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 246 transitions. [2024-11-23 23:43:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-23 23:43:02,223 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:43:02,223 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:43:02,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-23 23:43:02,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:43:02,424 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:43:02,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:43:02,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1310665658, now seen corresponding path program 1 times [2024-11-23 23:43:02,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:43:02,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837463885] [2024-11-23 23:43:02,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:43:02,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:43:02,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:43:02,427 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:43:02,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-23 23:43:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:43:02,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-23 23:43:02,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:43:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-23 23:43:06,105 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:43:06,105 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:43:06,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837463885] [2024-11-23 23:43:06,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837463885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:43:06,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:43:06,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-23 23:43:06,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370281673] [2024-11-23 23:43:06,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:43:06,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 23:43:06,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:43:06,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 23:43:06,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:43:06,106 INFO L87 Difference]: Start difference. First operand 199 states and 246 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:43:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:43:07,862 INFO L93 Difference]: Finished difference Result 215 states and 262 transitions. [2024-11-23 23:43:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:43:07,864 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 71 [2024-11-23 23:43:07,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:43:07,866 INFO L225 Difference]: With dead ends: 215 [2024-11-23 23:43:07,866 INFO L226 Difference]: Without dead ends: 206 [2024-11-23 23:43:07,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:43:07,866 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 6 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:43:07,867 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 506 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-23 23:43:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-23 23:43:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 199. [2024-11-23 23:43:07,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 148 states have (on average 1.1283783783783783) internal successors, (167), 156 states have internal predecessors, (167), 30 states have call successors, (30), 14 states have call predecessors, (30), 20 states have return successors, (48), 28 states have call predecessors, (48), 29 states have call successors, (48) [2024-11-23 23:43:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 245 transitions. [2024-11-23 23:43:07,969 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 245 transitions. Word has length 71 [2024-11-23 23:43:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:43:07,969 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 245 transitions. [2024-11-23 23:43:07,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:43:07,970 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 245 transitions. [2024-11-23 23:43:07,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-23 23:43:07,971 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:43:07,971 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:43:07,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-23 23:43:08,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:43:08,179 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:43:08,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:43:08,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1385395055, now seen corresponding path program 1 times [2024-11-23 23:43:08,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:43:08,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049054796] [2024-11-23 23:43:08,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:43:08,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:43:08,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:43:08,186 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:43:08,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-23 23:43:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:43:08,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 23:43:08,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:43:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 23:43:15,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:43:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 23:43:24,352 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:43:24,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049054796] [2024-11-23 23:43:24,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049054796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:43:24,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:43:24,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-11-23 23:43:24,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514048687] [2024-11-23 23:43:24,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:43:24,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 23:43:24,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:43:24,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 23:43:24,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:43:24,354 INFO L87 Difference]: Start difference. First operand 199 states and 245 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-23 23:43:42,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:43:42,730 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2024-11-23 23:43:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:43:42,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 71 [2024-11-23 23:43:42,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:43:42,733 INFO L225 Difference]: With dead ends: 238 [2024-11-23 23:43:42,733 INFO L226 Difference]: Without dead ends: 229 [2024-11-23 23:43:42,733 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2024-11-23 23:43:42,734 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 59 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:43:42,734 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1048 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2024-11-23 23:43:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-23 23:43:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 204. [2024-11-23 23:43:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 152 states have (on average 1.138157894736842) internal successors, (173), 161 states have internal predecessors, (173), 30 states have call successors, (30), 14 states have call predecessors, (30), 21 states have return successors, (52), 28 states have call predecessors, (52), 29 states have call successors, (52) [2024-11-23 23:43:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 255 transitions. [2024-11-23 23:43:42,785 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 255 transitions. Word has length 71 [2024-11-23 23:43:42,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:43:42,785 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 255 transitions. [2024-11-23 23:43:42,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-23 23:43:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 255 transitions. [2024-11-23 23:43:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-23 23:43:42,786 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:43:42,786 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:43:42,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-23 23:43:42,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:43:42,987 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:43:42,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:43:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1604249773, now seen corresponding path program 1 times [2024-11-23 23:43:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:43:42,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196230778] [2024-11-23 23:43:42,988 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:43:42,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:43:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:43:42,990 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:43:42,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-23 23:43:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:43:43,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-23 23:43:43,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:43:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:43:46,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:43:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 23:43:55,556 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:43:55,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196230778] [2024-11-23 23:43:55,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196230778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:43:55,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:43:55,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-23 23:43:55,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812163716] [2024-11-23 23:43:55,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:43:55,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-23 23:43:55,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:43:55,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-23 23:43:55,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-23 23:43:55,558 INFO L87 Difference]: Start difference. First operand 204 states and 255 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-23 23:44:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:44:12,002 INFO L93 Difference]: Finished difference Result 303 states and 388 transitions. [2024-11-23 23:44:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-23 23:44:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 71 [2024-11-23 23:44:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:44:12,005 INFO L225 Difference]: With dead ends: 303 [2024-11-23 23:44:12,005 INFO L226 Difference]: Without dead ends: 283 [2024-11-23 23:44:12,006 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=342, Invalid=2108, Unknown=0, NotChecked=0, Total=2450 [2024-11-23 23:44:12,007 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 80 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:44:12,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 914 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2024-11-23 23:44:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-23 23:44:12,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 248. [2024-11-23 23:44:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 185 states have (on average 1.145945945945946) internal successors, (212), 196 states have internal predecessors, (212), 38 states have call successors, (38), 16 states have call predecessors, (38), 24 states have return successors, (70), 35 states have call predecessors, (70), 37 states have call successors, (70) [2024-11-23 23:44:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 320 transitions. [2024-11-23 23:44:12,077 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 320 transitions. Word has length 71 [2024-11-23 23:44:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:44:12,077 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 320 transitions. [2024-11-23 23:44:12,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-23 23:44:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 320 transitions. [2024-11-23 23:44:12,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-23 23:44:12,079 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:44:12,079 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:44:12,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-23 23:44:12,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:44:12,279 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:44:12,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:44:12,280 INFO L85 PathProgramCache]: Analyzing trace with hash -459972111, now seen corresponding path program 2 times [2024-11-23 23:44:12,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:44:12,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262862524] [2024-11-23 23:44:12,280 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:44:12,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:44:12,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:44:12,282 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:44:12,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-23 23:44:12,362 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:44:12,362 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:44:12,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-23 23:44:12,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:44:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:44:17,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:44:32,626 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 23:44:32,627 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:44:32,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262862524] [2024-11-23 23:44:32,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262862524] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:44:32,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:44:32,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2024-11-23 23:44:32,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376246655] [2024-11-23 23:44:32,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:44:32,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-23 23:44:32,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:44:32,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-23 23:44:32,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2024-11-23 23:44:32,629 INFO L87 Difference]: Start difference. First operand 248 states and 320 transitions. Second operand has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-23 23:45:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:14,596 INFO L93 Difference]: Finished difference Result 353 states and 459 transitions. [2024-11-23 23:45:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-23 23:45:14,598 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 71 [2024-11-23 23:45:14,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:14,600 INFO L225 Difference]: With dead ends: 353 [2024-11-23 23:45:14,600 INFO L226 Difference]: Without dead ends: 338 [2024-11-23 23:45:14,601 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=480, Invalid=4350, Unknown=0, NotChecked=0, Total=4830 [2024-11-23 23:45:14,602 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 58 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:45:14,602 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1303 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 18.4s Time] [2024-11-23 23:45:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2024-11-23 23:45:14,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 262. [2024-11-23 23:45:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 197 states have (on average 1.1573604060913705) internal successors, (228), 208 states have internal predecessors, (228), 40 states have call successors, (40), 17 states have call predecessors, (40), 24 states have return successors, (70), 36 states have call predecessors, (70), 39 states have call successors, (70) [2024-11-23 23:45:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 338 transitions. [2024-11-23 23:45:14,696 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 338 transitions. Word has length 71 [2024-11-23 23:45:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:14,696 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 338 transitions. [2024-11-23 23:45:14,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-23 23:45:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 338 transitions. [2024-11-23 23:45:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-23 23:45:14,699 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:14,699 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:45:14,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-23 23:45:14,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:14,899 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:14,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1455295583, now seen corresponding path program 1 times [2024-11-23 23:45:14,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:45:14,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705054039] [2024-11-23 23:45:14,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:14,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:14,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:14,903 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:14,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-23 23:45:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:14,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 23:45:14,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 23:45:20,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:45:23,735 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:45:23,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705054039] [2024-11-23 23:45:23,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705054039] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:23,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1630892304] [2024-11-23 23:45:23,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:23,736 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-23 23:45:23,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-23 23:45:23,739 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-23 23:45:23,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2024-11-23 23:45:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:23,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:45:23,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-23 23:45:26,671 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:26,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1630892304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:26,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:26,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2024-11-23 23:45:26,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864394739] [2024-11-23 23:45:26,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:26,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:45:26,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:45:26,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:45:26,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:45:26,673 INFO L87 Difference]: Start difference. First operand 262 states and 338 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:45:27,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:27,228 INFO L93 Difference]: Finished difference Result 307 states and 410 transitions. [2024-11-23 23:45:27,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:45:27,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2024-11-23 23:45:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:27,232 INFO L225 Difference]: With dead ends: 307 [2024-11-23 23:45:27,232 INFO L226 Difference]: Without dead ends: 282 [2024-11-23 23:45:27,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:45:27,234 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 9 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:45:27,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 303 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-23 23:45:27,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-23 23:45:27,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 257. [2024-11-23 23:45:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 192 states have (on average 1.1458333333333333) internal successors, (220), 202 states have internal predecessors, (220), 40 states have call successors, (40), 17 states have call predecessors, (40), 24 states have return successors, (82), 37 states have call predecessors, (82), 39 states have call successors, (82) [2024-11-23 23:45:27,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 342 transitions. [2024-11-23 23:45:27,368 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 342 transitions. Word has length 73 [2024-11-23 23:45:27,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:27,369 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 342 transitions. [2024-11-23 23:45:27,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-23 23:45:27,369 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 342 transitions. [2024-11-23 23:45:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-23 23:45:27,371 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:27,371 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:45:27,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-23 23:45:27,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2024-11-23 23:45:27,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt [2024-11-23 23:45:27,772 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:27,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:27,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1674150301, now seen corresponding path program 1 times [2024-11-23 23:45:27,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:45:27,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281941124] [2024-11-23 23:45:27,773 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:27,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:27,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:27,776 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:27,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-23 23:45:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:27,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-23 23:45:27,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:45:33,184 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:45:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 23:45:43,503 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:45:43,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281941124] [2024-11-23 23:45:43,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281941124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:45:43,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:45:43,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-23 23:45:43,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098079575] [2024-11-23 23:45:43,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:45:43,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-23 23:45:43,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:45:43,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-23 23:45:43,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-23 23:45:43,506 INFO L87 Difference]: Start difference. First operand 257 states and 342 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-23 23:45:53,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:53,866 INFO L93 Difference]: Finished difference Result 317 states and 412 transitions. [2024-11-23 23:45:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-23 23:45:53,868 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2024-11-23 23:45:53,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:53,870 INFO L225 Difference]: With dead ends: 317 [2024-11-23 23:45:53,870 INFO L226 Difference]: Without dead ends: 294 [2024-11-23 23:45:53,871 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2024-11-23 23:45:53,872 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 57 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:45:53,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1141 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2024-11-23 23:45:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-23 23:45:53,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 259. [2024-11-23 23:45:53,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 194 states have (on average 1.134020618556701) internal successors, (220), 203 states have internal predecessors, (220), 40 states have call successors, (40), 18 states have call predecessors, (40), 24 states have return successors, (77), 37 states have call predecessors, (77), 39 states have call successors, (77) [2024-11-23 23:45:53,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 337 transitions. [2024-11-23 23:45:53,962 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 337 transitions. Word has length 73 [2024-11-23 23:45:53,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:53,963 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 337 transitions. [2024-11-23 23:45:53,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-23 23:45:53,964 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 337 transitions. [2024-11-23 23:45:53,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-23 23:45:53,965 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:53,966 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:45:53,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-11-23 23:45:54,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:54,166 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:54,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:54,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1748879698, now seen corresponding path program 1 times [2024-11-23 23:45:54,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:45:54,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893433473] [2024-11-23 23:45:54,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:54,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:54,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:54,169 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:54,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-23 23:45:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:54,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:45:54,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-23 23:45:54,652 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:45:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-23 23:45:55,234 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:45:55,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893433473] [2024-11-23 23:45:55,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893433473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:45:55,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:45:55,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-23 23:45:55,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627120552] [2024-11-23 23:45:55,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:45:55,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:45:55,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:45:55,236 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:45:55,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:45:55,236 INFO L87 Difference]: Start difference. First operand 259 states and 337 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-23 23:45:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:55,607 INFO L93 Difference]: Finished difference Result 269 states and 347 transitions. [2024-11-23 23:45:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:45:55,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2024-11-23 23:45:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:55,610 INFO L225 Difference]: With dead ends: 269 [2024-11-23 23:45:55,610 INFO L226 Difference]: Without dead ends: 264 [2024-11-23 23:45:55,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:45:55,611 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 1 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:45:55,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 329 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 23:45:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-23 23:45:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 259. [2024-11-23 23:45:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 194 states have (on average 1.134020618556701) internal successors, (220), 203 states have internal predecessors, (220), 40 states have call successors, (40), 18 states have call predecessors, (40), 24 states have return successors, (77), 37 states have call predecessors, (77), 39 states have call successors, (77) [2024-11-23 23:45:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 337 transitions. [2024-11-23 23:45:55,703 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 337 transitions. Word has length 73 [2024-11-23 23:45:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:55,704 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 337 transitions. [2024-11-23 23:45:55,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-23 23:45:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 337 transitions. [2024-11-23 23:45:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-23 23:45:55,705 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:55,705 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:45:55,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-23 23:45:55,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:55,905 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:55,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:55,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1878942305, now seen corresponding path program 2 times [2024-11-23 23:45:55,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:45:55,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436639288] [2024-11-23 23:45:55,906 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:45:55,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:55,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:55,911 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:55,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-23 23:45:55,992 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:45:55,992 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:45:55,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-23 23:45:55,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:46:00,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:46:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 23:46:10,140 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:46:10,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436639288] [2024-11-23 23:46:10,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436639288] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:46:10,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:46:10,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-23 23:46:10,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500886915] [2024-11-23 23:46:10,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:46:10,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-23 23:46:10,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:46:10,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-23 23:46:10,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-11-23 23:46:10,142 INFO L87 Difference]: Start difference. First operand 259 states and 337 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-23 23:46:19,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:19,876 INFO L93 Difference]: Finished difference Result 321 states and 408 transitions. [2024-11-23 23:46:19,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-23 23:46:19,877 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2024-11-23 23:46:19,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:19,878 INFO L225 Difference]: With dead ends: 321 [2024-11-23 23:46:19,878 INFO L226 Difference]: Without dead ends: 307 [2024-11-23 23:46:19,879 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2024-11-23 23:46:19,879 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 35 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:19,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 966 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-11-23 23:46:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2024-11-23 23:46:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 267. [2024-11-23 23:46:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 201 states have (on average 1.1343283582089552) internal successors, (228), 209 states have internal predecessors, (228), 41 states have call successors, (41), 19 states have call predecessors, (41), 24 states have return successors, (75), 38 states have call predecessors, (75), 40 states have call successors, (75) [2024-11-23 23:46:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 344 transitions. [2024-11-23 23:46:19,957 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 344 transitions. Word has length 73 [2024-11-23 23:46:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:19,957 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 344 transitions. [2024-11-23 23:46:19,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-23 23:46:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 344 transitions. [2024-11-23 23:46:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-23 23:46:19,959 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:19,960 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:46:19,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-23 23:46:20,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:20,160 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:20,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:20,161 INFO L85 PathProgramCache]: Analyzing trace with hash 127130955, now seen corresponding path program 1 times [2024-11-23 23:46:20,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:46:20,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265217311] [2024-11-23 23:46:20,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:20,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:20,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:20,163 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:20,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-23 23:46:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:20,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-23 23:46:20,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-23 23:46:23,754 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:46:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-23 23:46:31,453 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:46:31,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265217311] [2024-11-23 23:46:31,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265217311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:46:31,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:46:31,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-23 23:46:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283814518] [2024-11-23 23:46:31,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:46:31,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-23 23:46:31,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:46:31,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-23 23:46:31,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-11-23 23:46:31,455 INFO L87 Difference]: Start difference. First operand 267 states and 344 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-23 23:46:43,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:43,483 INFO L93 Difference]: Finished difference Result 342 states and 425 transitions. [2024-11-23 23:46:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-23 23:46:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 76 [2024-11-23 23:46:43,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:43,487 INFO L225 Difference]: With dead ends: 342 [2024-11-23 23:46:43,487 INFO L226 Difference]: Without dead ends: 258 [2024-11-23 23:46:43,488 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2024-11-23 23:46:43,489 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 35 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:43,489 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1209 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2024-11-23 23:46:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-23 23:46:43,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 238. [2024-11-23 23:46:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 178 states have (on average 1.1067415730337078) internal successors, (197), 186 states have internal predecessors, (197), 37 states have call successors, (37), 17 states have call predecessors, (37), 22 states have return successors, (65), 34 states have call predecessors, (65), 36 states have call successors, (65) [2024-11-23 23:46:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 299 transitions. [2024-11-23 23:46:43,595 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 299 transitions. Word has length 76 [2024-11-23 23:46:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:43,595 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 299 transitions. [2024-11-23 23:46:43,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-23 23:46:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 299 transitions. [2024-11-23 23:46:43,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-23 23:46:43,597 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:43,597 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:46:43,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-23 23:46:43,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:43,798 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:43,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:43,798 INFO L85 PathProgramCache]: Analyzing trace with hash 893805912, now seen corresponding path program 1 times [2024-11-23 23:46:43,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:46:43,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179389721] [2024-11-23 23:46:43,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:43,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:43,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:43,801 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:43,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-23 23:46:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:43,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:46:43,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-23 23:46:44,279 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:46:44,279 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:46:44,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179389721] [2024-11-23 23:46:44,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179389721] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:44,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:46:44,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:46:44,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269394262] [2024-11-23 23:46:44,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:44,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:46:44,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:46:44,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:46:44,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:46:44,280 INFO L87 Difference]: Start difference. First operand 238 states and 299 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-23 23:46:44,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:44,688 INFO L93 Difference]: Finished difference Result 249 states and 310 transitions. [2024-11-23 23:46:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:46:44,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2024-11-23 23:46:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:44,690 INFO L225 Difference]: With dead ends: 249 [2024-11-23 23:46:44,690 INFO L226 Difference]: Without dead ends: 237 [2024-11-23 23:46:44,690 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:46:44,691 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 0 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:44,691 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 320 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 23:46:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-23 23:46:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 220. [2024-11-23 23:46:44,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 165 states have (on average 1.103030303030303) internal successors, (182), 171 states have internal predecessors, (182), 34 states have call successors, (34), 16 states have call predecessors, (34), 20 states have return successors, (55), 32 states have call predecessors, (55), 33 states have call successors, (55) [2024-11-23 23:46:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 271 transitions. [2024-11-23 23:46:44,785 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 271 transitions. Word has length 75 [2024-11-23 23:46:44,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:44,786 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 271 transitions. [2024-11-23 23:46:44,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-23 23:46:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 271 transitions. [2024-11-23 23:46:44,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-23 23:46:44,788 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:44,788 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:46:44,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-23 23:46:44,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:44,988 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:44,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:44,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1446556424, now seen corresponding path program 1 times [2024-11-23 23:46:44,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:46:44,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948125840] [2024-11-23 23:46:44,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:44,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:44,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:44,992 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:44,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-23 23:46:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:45,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:46:45,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:46:49,318 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:46:50,634 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:46:50,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948125840] [2024-11-23 23:46:50,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948125840] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:50,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [229093597] [2024-11-23 23:46:50,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:50,635 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-23 23:46:50,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-23 23:46:50,637 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-23 23:46:50,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2024-11-23 23:46:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:50,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 23:46:50,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:46:52,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:46:54,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [229093597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:54,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:46:54,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2024-11-23 23:46:54,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273851281] [2024-11-23 23:46:54,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 23:46:54,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 23:46:54,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 23:46:54,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 23:46:54,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:46:54,377 INFO L87 Difference]: Start difference. First operand 220 states and 271 transitions. Second operand has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-23 23:47:03,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-23 23:47:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:47:04,765 INFO L93 Difference]: Finished difference Result 247 states and 304 transitions. [2024-11-23 23:47:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-23 23:47:04,766 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 80 [2024-11-23 23:47:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:47:04,768 INFO L225 Difference]: With dead ends: 247 [2024-11-23 23:47:04,768 INFO L226 Difference]: Without dead ends: 238 [2024-11-23 23:47:04,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-11-23 23:47:04,769 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 27 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:47:04,769 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 826 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2024-11-23 23:47:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-23 23:47:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 226. [2024-11-23 23:47:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 169 states have (on average 1.1005917159763314) internal successors, (186), 175 states have internal predecessors, (186), 35 states have call successors, (35), 16 states have call predecessors, (35), 21 states have return successors, (62), 34 states have call predecessors, (62), 34 states have call successors, (62) [2024-11-23 23:47:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 283 transitions. [2024-11-23 23:47:04,852 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 283 transitions. Word has length 80 [2024-11-23 23:47:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:47:04,852 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 283 transitions. [2024-11-23 23:47:04,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-23 23:47:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 283 transitions. [2024-11-23 23:47:04,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-23 23:47:04,853 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:47:04,853 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:47:04,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-23 23:47:05,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2024-11-23 23:47:05,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt [2024-11-23 23:47:05,254 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:47:05,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:47:05,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1462207478, now seen corresponding path program 1 times [2024-11-23 23:47:05,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 23:47:05,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285240427] [2024-11-23 23:47:05,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:47:05,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:47:05,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:47:05,257 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:47:05,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-23 23:47:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:47:05,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:47:05,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:47:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:47:24,499 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:47:29,287 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 23:47:29,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285240427] [2024-11-23 23:47:29,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285240427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:47:29,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1047610479] [2024-11-23 23:47:29,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:47:29,287 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-23 23:47:29,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-23 23:47:29,294 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-23 23:47:29,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f6c02f-5e33-4406-bf8d-4148a38a0856/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2024-11-23 23:47:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:47:29,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 23:47:29,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:48:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:48:01,108 INFO L312 TraceCheckSpWp]: Computing backward predicates...