./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52e7e3a0d80d0519558794c69b54bf5c07c5549c1d780651d891121aff50735c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:32:54,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:32:54,859 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:32:54,871 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:32:54,871 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:32:54,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:32:54,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:32:54,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:32:54,933 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:32:54,934 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:32:54,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:32:54,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:32:54,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:32:54,936 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:32:54,937 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:32:54,937 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:32:54,937 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:32:54,938 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:32:54,938 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:32:54,938 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:32:54,938 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:32:54,938 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:32:54,938 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:32:54,938 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:32:54,938 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:32:54,938 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:32:54,938 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:32:54,939 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:32:54,939 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:32:54,939 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:32:54,939 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:32:54,939 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:32:54,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:32:54,939 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:32:54,940 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:32:54,940 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:32:54,940 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:32:54,940 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:32:54,940 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:32:54,940 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:32:54,940 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:32:54,940 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:32:54,940 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:32:54,942 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:32:54,943 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:32:54,943 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:32:54,943 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:32:54,943 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:32:54,944 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_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52e7e3a0d80d0519558794c69b54bf5c07c5549c1d780651d891121aff50735c [2024-11-28 03:32:55,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:32:55,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:32:55,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:32:55,382 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:32:55,382 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:32:55,386 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c [2024-11-28 03:32:59,163 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/data/55c4ec6e6/d12a4c0a165f473eaf5c3a72b08f6224/FLAG494693b4d [2024-11-28 03:32:59,590 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:32:59,591 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c [2024-11-28 03:32:59,604 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/data/55c4ec6e6/d12a4c0a165f473eaf5c3a72b08f6224/FLAG494693b4d [2024-11-28 03:32:59,627 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/data/55c4ec6e6/d12a4c0a165f473eaf5c3a72b08f6224 [2024-11-28 03:32:59,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:32:59,632 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:32:59,634 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:32:59,634 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:32:59,640 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:32:59,641 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:32:59" (1/1) ... [2024-11-28 03:32:59,642 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a2dba92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:32:59, skipping insertion in model container [2024-11-28 03:32:59,643 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:32:59" (1/1) ... [2024-11-28 03:32:59,671 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:32:59,952 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_f34b8802-907d-45a8-ab01-41161847c6d1/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[1999,2012] [2024-11-28 03:32:59,959 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_f34b8802-907d-45a8-ab01-41161847c6d1/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[2368,2381] [2024-11-28 03:33:00,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:33:00,025 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:33:00,049 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_f34b8802-907d-45a8-ab01-41161847c6d1/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[1999,2012] [2024-11-28 03:33:00,055 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_f34b8802-907d-45a8-ab01-41161847c6d1/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[2368,2381] [2024-11-28 03:33:00,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:33:00,128 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:33:00,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00 WrapperNode [2024-11-28 03:33:00,130 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:33:00,132 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:33:00,132 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:33:00,132 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:33:00,146 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,154 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,182 INFO L138 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2024-11-28 03:33:00,183 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:33:00,184 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:33:00,184 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:33:00,184 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:33:00,196 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,200 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,216 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 03:33:00,217 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,217 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,224 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,225 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,233 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,235 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,243 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:33:00,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:33:00,244 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:33:00,244 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:33:00,246 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (1/1) ... [2024-11-28 03:33:00,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:33:00,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:00,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:33:00,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:33:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:33:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-28 03:33:00,352 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-28 03:33:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:33:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:33:00,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:33:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 03:33:00,353 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 03:33:00,474 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:33:00,476 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:33:00,982 INFO L? ?]: Removed 74 outVars from TransFormulas that were not future-live. [2024-11-28 03:33:00,982 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:33:00,997 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:33:00,998 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:33:00,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:00 BoogieIcfgContainer [2024-11-28 03:33:00,998 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:33:01,005 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:33:01,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:33:01,016 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:33:01,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:32:59" (1/3) ... [2024-11-28 03:33:01,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf4268d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:01, skipping insertion in model container [2024-11-28 03:33:01,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:00" (2/3) ... [2024-11-28 03:33:01,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf4268d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:01, skipping insertion in model container [2024-11-28 03:33:01,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:00" (3/3) ... [2024-11-28 03:33:01,024 INFO L128 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_3a.c.cil.c [2024-11-28 03:33:01,047 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:33:01,050 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_4+soft_float_3a.c.cil.c that has 3 procedures, 81 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-28 03:33:01,136 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:33:01,162 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;@7835a09f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:33:01,162 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-28 03:33:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 71 states have (on average 1.5633802816901408) internal successors, (111), 74 states have internal predecessors, (111), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 03:33:01,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 03:33:01,176 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:33:01,177 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:01,177 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:33:01,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:01,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1530844763, now seen corresponding path program 1 times [2024-11-28 03:33:01,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:01,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722378562] [2024-11-28 03:33:01,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:01,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:01,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:33:01,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722378562] [2024-11-28 03:33:01,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722378562] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:01,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:01,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:33:01,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208177964] [2024-11-28 03:33:01,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:01,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 03:33:01,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:33:01,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 03:33:01,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:33:01,435 INFO L87 Difference]: Start difference. First operand has 81 states, 71 states have (on average 1.5633802816901408) internal successors, (111), 74 states have internal predecessors, (111), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2024-11-28 03:33:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:33:01,489 INFO L93 Difference]: Finished difference Result 157 states and 239 transitions. [2024-11-28 03:33:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 03:33:01,494 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 [2024-11-28 03:33:01,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:33:01,506 INFO L225 Difference]: With dead ends: 157 [2024-11-28 03:33:01,506 INFO L226 Difference]: Without dead ends: 72 [2024-11-28 03:33:01,512 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 [2024-11-28 03:33:01,516 INFO L435 NwaCegarLoop]: 112 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, 112 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 [2024-11-28 03:33:01,521 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:33:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-28 03:33:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-28 03:33:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.4375) internal successors, (92), 65 states have internal predecessors, (92), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:33:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2024-11-28 03:33:01,631 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 7 [2024-11-28 03:33:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:33:01,633 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2024-11-28 03:33:01,634 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) [2024-11-28 03:33:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2024-11-28 03:33:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 03:33:01,635 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:33:01,635 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:01,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:33:01,637 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:33:01,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:01,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1530904345, now seen corresponding path program 1 times [2024-11-28 03:33:01,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:33:01,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160020399] [2024-11-28 03:33:01,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:01,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:33:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 03:33:01,672 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 03:33:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 03:33:01,711 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 03:33:01,711 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 03:33:01,714 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-28 03:33:01,716 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-28 03:33:01,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:33:01,722 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-28 03:33:01,739 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 03:33:01,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:33:01 BoogieIcfgContainer [2024-11-28 03:33:01,746 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 03:33:01,747 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 03:33:01,747 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 03:33:01,747 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 03:33:01,748 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:00" (3/4) ... [2024-11-28 03:33:01,750 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-28 03:33:01,751 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 03:33:01,752 INFO L158 Benchmark]: Toolchain (without parser) took 2120.91ms. Allocated memory is still 117.4MB. Free memory was 85.2MB in the beginning and 77.6MB in the end (delta: 7.5MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2024-11-28 03:33:01,753 INFO L158 Benchmark]: CDTParser took 0.62ms. Allocated memory is still 167.8MB. Free memory is still 106.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:33:01,753 INFO L158 Benchmark]: CACSL2BoogieTranslator took 497.83ms. Allocated memory is still 117.4MB. Free memory was 84.8MB in the beginning and 70.7MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 03:33:01,753 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.16ms. Allocated memory is still 117.4MB. Free memory was 70.7MB in the beginning and 68.7MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:33:01,754 INFO L158 Benchmark]: Boogie Preprocessor took 59.14ms. Allocated memory is still 117.4MB. Free memory was 68.7MB in the beginning and 66.7MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:33:01,754 INFO L158 Benchmark]: RCFGBuilder took 754.78ms. Allocated memory is still 117.4MB. Free memory was 66.7MB in the beginning and 45.9MB in the end (delta: 20.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-28 03:33:01,755 INFO L158 Benchmark]: TraceAbstraction took 741.45ms. Allocated memory is still 117.4MB. Free memory was 45.6MB in the beginning and 77.7MB in the end (delta: -32.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:33:01,755 INFO L158 Benchmark]: Witness Printer took 4.55ms. Allocated memory is still 117.4MB. Free memory was 77.7MB in the beginning and 77.6MB in the end (delta: 32.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:33:01,758 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62ms. Allocated memory is still 167.8MB. Free memory is still 106.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 497.83ms. Allocated memory is still 117.4MB. Free memory was 84.8MB in the beginning and 70.7MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.16ms. Allocated memory is still 117.4MB. Free memory was 70.7MB in the beginning and 68.7MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 59.14ms. Allocated memory is still 117.4MB. Free memory was 68.7MB in the beginning and 66.7MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 754.78ms. Allocated memory is still 117.4MB. Free memory was 66.7MB in the beginning and 45.9MB in the end (delta: 20.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 741.45ms. Allocated memory is still 117.4MB. Free memory was 45.6MB in the beginning and 77.7MB in the end (delta: -32.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.55ms. Allocated memory is still 117.4MB. Free memory was 77.7MB in the beginning and 77.6MB in the end (delta: 32.3kB). 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 40, overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L320] COND TRUE __VERIFIER_nondet_int() [L321] 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 < 1.39844f) [L48] reach_error() - UnprovableResult [Line: 60]: 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 3 procedures, 81 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, 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, 112 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, 112 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=81occurred 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: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s 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 [2024-11-28 03:33:01,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/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_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52e7e3a0d80d0519558794c69b54bf5c07c5549c1d780651d891121aff50735c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:33:05,238 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:33:05,436 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-28 03:33:05,451 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:33:05,451 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:33:05,502 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:33:05,504 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:33:05,504 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:33:05,505 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:33:05,505 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:33:05,507 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:33:05,507 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:33:05,507 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:33:05,507 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:33:05,507 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:33:05,508 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:33:05,508 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:33:05,508 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:33:05,508 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:33:05,508 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:33:05,508 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:33:05,508 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:33:05,508 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:33:05,509 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:33:05,510 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 03:33:05,510 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 03:33:05,510 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:33:05,510 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:33:05,510 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:33:05,510 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:33:05,511 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:33:05,511 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:33:05,511 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:33:05,512 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:33:05,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:33:05,512 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:33:05,512 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:33:05,513 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:33:05,513 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:33:05,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:33:05,513 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:33:05,513 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:33:05,513 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:33:05,513 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:33:05,513 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 03:33:05,514 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 03:33:05,514 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:33:05,514 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:33:05,514 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:33:05,515 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:33:05,515 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_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52e7e3a0d80d0519558794c69b54bf5c07c5549c1d780651d891121aff50735c [2024-11-28 03:33:05,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:33:05,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:33:05,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:33:05,970 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:33:05,970 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:33:05,972 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c [2024-11-28 03:33:09,104 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/data/0a43aab92/94845c4058394d79b1b1c18085d8d751/FLAGd22f91ef9 [2024-11-28 03:33:09,399 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:33:09,400 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c [2024-11-28 03:33:09,417 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/data/0a43aab92/94845c4058394d79b1b1c18085d8d751/FLAGd22f91ef9 [2024-11-28 03:33:09,693 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/data/0a43aab92/94845c4058394d79b1b1c18085d8d751 [2024-11-28 03:33:09,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:33:09,699 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:33:09,701 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:33:09,702 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:33:09,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:33:09,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:33:09" (1/1) ... [2024-11-28 03:33:09,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56134380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:09, skipping insertion in model container [2024-11-28 03:33:09,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:33:09" (1/1) ... [2024-11-28 03:33:09,751 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:33:09,932 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_f34b8802-907d-45a8-ab01-41161847c6d1/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[1999,2012] [2024-11-28 03:33:09,937 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_f34b8802-907d-45a8-ab01-41161847c6d1/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[2368,2381] [2024-11-28 03:33:10,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:33:10,015 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:33:10,035 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_f34b8802-907d-45a8-ab01-41161847c6d1/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[1999,2012] [2024-11-28 03:33:10,037 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_f34b8802-907d-45a8-ab01-41161847c6d1/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[2368,2381] [2024-11-28 03:33:10,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:33:10,108 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:33:10,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10 WrapperNode [2024-11-28 03:33:10,110 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:33:10,111 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:33:10,113 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:33:10,113 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:33:10,122 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,184 INFO L138 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 132 [2024-11-28 03:33:10,187 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:33:10,188 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:33:10,188 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:33:10,188 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:33:10,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,203 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,233 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 03:33:10,234 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,234 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,249 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,250 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,260 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,262 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,266 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,273 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:33:10,274 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:33:10,274 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:33:10,274 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:33:10,275 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (1/1) ... [2024-11-28 03:33:10,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:33:10,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:33:10,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:33:10,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:33:10,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:33:10,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 03:33:10,363 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-28 03:33:10,363 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-28 03:33:10,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:33:10,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:33:10,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 03:33:10,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 03:33:10,491 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:33:10,495 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:33:15,142 INFO L? ?]: Removed 58 outVars from TransFormulas that were not future-live. [2024-11-28 03:33:15,143 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:33:15,158 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:33:15,160 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:33:15,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:15 BoogieIcfgContainer [2024-11-28 03:33:15,162 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:33:15,165 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:33:15,166 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:33:15,173 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:33:15,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:33:09" (1/3) ... [2024-11-28 03:33:15,175 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7c9584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:15, skipping insertion in model container [2024-11-28 03:33:15,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:10" (2/3) ... [2024-11-28 03:33:15,177 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7c9584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:15, skipping insertion in model container [2024-11-28 03:33:15,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:15" (3/3) ... [2024-11-28 03:33:15,179 INFO L128 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_3a.c.cil.c [2024-11-28 03:33:15,196 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:33:15,199 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_4+soft_float_3a.c.cil.c that has 3 procedures, 58 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-28 03:33:15,262 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:33:15,283 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;@7218536c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:33:15,284 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-28 03:33:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 51 states have internal predecessors, (76), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 03:33:15,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 03:33:15,296 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:33:15,297 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:15,297 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:33:15,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:15,305 INFO L85 PathProgramCache]: Analyzing trace with hash 78502818, now seen corresponding path program 1 times [2024-11-28 03:33:15,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:33:15,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940877276] [2024-11-28 03:33:15,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:15,325 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 [2024-11-28 03:33:15,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-28 03:33:15,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/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) [2024-11-28 03:33:15,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/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 [2024-11-28 03:33:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:33:16,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 03:33:16,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:33:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:33:16,063 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:33:16,064 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:33:16,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940877276] [2024-11-28 03:33:16,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940877276] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:33:16,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:33:16,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:33:16,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12137482] [2024-11-28 03:33:16,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:33:16,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 03:33:16,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:33:16,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 03:33:16,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:33:16,095 INFO L87 Difference]: Start difference. First operand has 58 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 51 states have internal predecessors, (76), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2024-11-28 03:33:16,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:33:16,132 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2024-11-28 03:33:16,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 03:33:16,135 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 [2024-11-28 03:33:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:33:16,142 INFO L225 Difference]: With dead ends: 111 [2024-11-28 03:33:16,142 INFO L226 Difference]: Without dead ends: 49 [2024-11-28 03:33:16,146 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 [2024-11-28 03:33:16,149 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 [2024-11-28 03:33:16,150 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] [2024-11-28 03:33:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-28 03:33:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-28 03:33:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 42 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:33:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2024-11-28 03:33:16,194 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 7 [2024-11-28 03:33:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:33:16,194 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2024-11-28 03:33:16,195 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) [2024-11-28 03:33:16,195 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2024-11-28 03:33:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 03:33:16,196 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:33:16,196 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:33:16,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/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)] Ended with exit code 0 [2024-11-28 03:33:16,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/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 [2024-11-28 03:33:16,397 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:33:16,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:33:16,398 INFO L85 PathProgramCache]: Analyzing trace with hash 78562400, now seen corresponding path program 1 times [2024-11-28 03:33:16,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:33:16,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822567280] [2024-11-28 03:33:16,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:33:16,398 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 [2024-11-28 03:33:16,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-28 03:33:16,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/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) [2024-11-28 03:33:16,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/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 [2024-11-28 03:41:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:41:13,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:41:13,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:41:22,332 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) [2024-11-28 03:41:30,449 WARN L286 SmtUtils]: Spent 8.12s 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) [2024-11-28 03:41:37,808 WARN L286 SmtUtils]: Spent 7.36s 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) [2024-11-28 03:41:41,889 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 [2024-11-28 03:41:58,234 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) [2024-11-28 03:42:06,446 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) [2024-11-28 03:42:14,560 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) [2024-11-28 03:42:26,872 WARN L286 SmtUtils]: Spent 8.25s 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) [2024-11-28 03:42:35,074 WARN L286 SmtUtils]: Spent 8.20s 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) [2024-11-28 03:42:43,189 WARN L286 SmtUtils]: Spent 8.11s 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) [2024-11-28 03:42:47,293 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 (/ 34961.0 25000.0)))))) (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 [2024-11-28 03:42:51,338 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 (/ 34961.0 25000.0)))))) (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 [2024-11-28 03:42:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:42:51,339 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:42:51,339 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:42:51,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822567280] [2024-11-28 03:42:51,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822567280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:42:51,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:42:51,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:42:51,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638659342] [2024-11-28 03:42:51,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:42:51,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:42:51,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:42:51,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:42:51,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-28 03:42:51,342 INFO L87 Difference]: Start difference. First operand 49 states and 68 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) [2024-11-28 03:42:55,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 03:42:59,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 03:43:03,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 03:43:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:03,925 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2024-11-28 03:43:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:43:03,928 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 [2024-11-28 03:43:03,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:03,929 INFO L225 Difference]: With dead ends: 49 [2024-11-28 03:43:03,929 INFO L226 Difference]: Without dead ends: 44 [2024-11-28 03:43:03,930 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-28 03:43:03,931 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 62 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:03,931 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 169 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 3 Unknown, 136 Unchecked, 12.6s Time] [2024-11-28 03:43:03,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-28 03:43:03,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-28 03:43:03,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 37 states have internal predecessors, (54), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:43:03,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2024-11-28 03:43:03,946 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 7 [2024-11-28 03:43:03,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:03,946 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2024-11-28 03:43:03,947 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) [2024-11-28 03:43:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2024-11-28 03:43:03,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 03:43:03,948 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:03,948 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:03,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/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 [2024-11-28 03:43:04,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/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 [2024-11-28 03:43:04,149 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:04,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:04,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1680982752, now seen corresponding path program 1 times [2024-11-28 03:43:04,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:04,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450134330] [2024-11-28 03:43:04,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:04,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:04,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:04,154 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:04,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:43:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:04,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:43:04,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:43:04,455 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:43:04,455 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:04,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450134330] [2024-11-28 03:43:04,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450134330] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:04,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:04,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:43:04,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575856940] [2024-11-28 03:43:04,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:04,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:43:04,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:04,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:43:04,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:43:04,458 INFO L87 Difference]: Start difference. First operand 44 states and 63 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:43:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:05,177 INFO L93 Difference]: Finished difference Result 96 states and 142 transitions. [2024-11-28 03:43:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:43:05,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-11-28 03:43:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:05,181 INFO L225 Difference]: With dead ends: 96 [2024-11-28 03:43:05,181 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 03:43:05,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:43:05,183 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 10 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:05,183 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:43:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 03:43:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2024-11-28 03:43:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 03:43:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2024-11-28 03:43:05,194 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 42 [2024-11-28 03:43:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:05,195 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2024-11-28 03:43:05,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:43:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2024-11-28 03:43:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 03:43:05,197 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:05,197 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:05,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:43:05,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:05,401 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:05,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:05,402 INFO L85 PathProgramCache]: Analyzing trace with hash -962375373, now seen corresponding path program 1 times [2024-11-28 03:43:05,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:05,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951250133] [2024-11-28 03:43:05,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:05,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:05,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:05,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:05,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:43:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:05,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 03:43:05,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 03:43:05,584 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:43:05,584 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:05,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951250133] [2024-11-28 03:43:05,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951250133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:05,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:05,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:43:05,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131941307] [2024-11-28 03:43:05,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:05,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:43:05,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:05,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:43:05,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:43:05,587 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:43:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:05,647 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2024-11-28 03:43:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:43:05,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2024-11-28 03:43:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:05,650 INFO L225 Difference]: With dead ends: 58 [2024-11-28 03:43:05,651 INFO L226 Difference]: Without dead ends: 49 [2024-11-28 03:43:05,653 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:43:05,654 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:05,654 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:43:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-28 03:43:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-28 03:43:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 03:43:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2024-11-28 03:43:05,669 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 44 [2024-11-28 03:43:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:05,669 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2024-11-28 03:43:05,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:43:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2024-11-28 03:43:05,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 03:43:05,670 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:05,670 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:05,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:43:05,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:05,871 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:05,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1484194953, now seen corresponding path program 1 times [2024-11-28 03:43:05,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:05,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789128131] [2024-11-28 03:43:05,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:05,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:05,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:05,874 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:05,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:43:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:05,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:43:05,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:43:06,229 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:43:06,229 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:06,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789128131] [2024-11-28 03:43:06,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789128131] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:06,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:06,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:43:06,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988337778] [2024-11-28 03:43:06,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:06,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:43:06,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:06,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:43:06,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:43:06,231 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:43:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:06,664 INFO L93 Difference]: Finished difference Result 97 states and 138 transitions. [2024-11-28 03:43:06,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:43:06,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-11-28 03:43:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:06,666 INFO L225 Difference]: With dead ends: 97 [2024-11-28 03:43:06,666 INFO L226 Difference]: Without dead ends: 56 [2024-11-28 03:43:06,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:43:06,668 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:06,669 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 151 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:43:06,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-28 03:43:06,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-11-28 03:43:06,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 45 states have internal predecessors, (61), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 03:43:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2024-11-28 03:43:06,685 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 46 [2024-11-28 03:43:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:06,685 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2024-11-28 03:43:06,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:43:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2024-11-28 03:43:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 03:43:06,687 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:06,687 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:06,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:43:06,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:06,889 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:06,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:06,890 INFO L85 PathProgramCache]: Analyzing trace with hash 443440524, now seen corresponding path program 1 times [2024-11-28 03:43:06,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:06,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550726249] [2024-11-28 03:43:06,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:06,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:06,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:06,892 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:06,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:43:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:06,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:43:06,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:43:08,552 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:43:10,557 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:10,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550726249] [2024-11-28 03:43:10,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550726249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:10,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:10,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-28 03:43:10,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559881896] [2024-11-28 03:43:10,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:10,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:43:10,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:10,558 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:43:10,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:43:10,562 INFO L87 Difference]: Start difference. First operand 53 states and 74 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:43:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:11,609 INFO L93 Difference]: Finished difference Result 99 states and 151 transitions. [2024-11-28 03:43:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:43:11,610 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2024-11-28 03:43:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:11,611 INFO L225 Difference]: With dead ends: 99 [2024-11-28 03:43:11,611 INFO L226 Difference]: Without dead ends: 76 [2024-11-28 03:43:11,612 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:43:11,612 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 64 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:11,613 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 693 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 03:43:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-28 03:43:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-28 03:43:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.380952380952381) internal successors, (87), 65 states have internal predecessors, (87), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2024-11-28 03:43:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 115 transitions. [2024-11-28 03:43:11,626 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 115 transitions. Word has length 47 [2024-11-28 03:43:11,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:11,629 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 115 transitions. [2024-11-28 03:43:11,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:43:11,629 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 115 transitions. [2024-11-28 03:43:11,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 03:43:11,634 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:11,634 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:11,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:43:11,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:11,835 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:11,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1195332808, now seen corresponding path program 1 times [2024-11-28 03:43:11,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:11,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276762589] [2024-11-28 03:43:11,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:11,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:11,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:11,837 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:11,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:43:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:11,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:43:11,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:43:12,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:43:13,019 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:13,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276762589] [2024-11-28 03:43:13,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276762589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:13,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:13,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-28 03:43:13,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682773012] [2024-11-28 03:43:13,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:13,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:43:13,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:13,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:43:13,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:43:13,020 INFO L87 Difference]: Start difference. First operand 76 states and 115 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:43:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:13,447 INFO L93 Difference]: Finished difference Result 115 states and 177 transitions. [2024-11-28 03:43:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:43:13,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-11-28 03:43:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:13,450 INFO L225 Difference]: With dead ends: 115 [2024-11-28 03:43:13,450 INFO L226 Difference]: Without dead ends: 110 [2024-11-28 03:43:13,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:43:13,451 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 15 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:13,452 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 277 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:43:13,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-28 03:43:13,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2024-11-28 03:43:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 94 states have (on average 1.4148936170212767) internal successors, (133), 94 states have internal predecessors, (133), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-28 03:43:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 170 transitions. [2024-11-28 03:43:13,468 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 170 transitions. Word has length 47 [2024-11-28 03:43:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:13,468 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 170 transitions. [2024-11-28 03:43:13,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:43:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 170 transitions. [2024-11-28 03:43:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 03:43:13,470 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:13,470 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:13,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:43:13,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:13,671 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:13,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:13,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1516766196, now seen corresponding path program 1 times [2024-11-28 03:43:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:13,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751207096] [2024-11-28 03:43:13,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:13,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:13,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:13,673 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:13,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:43:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:13,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:43:13,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:43:14,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 03:43:15,116 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:15,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751207096] [2024-11-28 03:43:15,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751207096] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:43:15,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:43:15,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2024-11-28 03:43:15,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873967947] [2024-11-28 03:43:15,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:15,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:43:15,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:15,118 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:43:15,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:43:15,119 INFO L87 Difference]: Start difference. First operand 109 states and 170 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:43:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:15,462 INFO L93 Difference]: Finished difference Result 115 states and 175 transitions. [2024-11-28 03:43:15,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:43:15,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-11-28 03:43:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:15,464 INFO L225 Difference]: With dead ends: 115 [2024-11-28 03:43:15,464 INFO L226 Difference]: Without dead ends: 109 [2024-11-28 03:43:15,465 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:43:15,466 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 1 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:15,466 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 293 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:43:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-28 03:43:15,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-28 03:43:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 94 states have (on average 1.4042553191489362) internal successors, (132), 94 states have internal predecessors, (132), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-28 03:43:15,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 169 transitions. [2024-11-28 03:43:15,480 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 169 transitions. Word has length 49 [2024-11-28 03:43:15,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:15,480 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 169 transitions. [2024-11-28 03:43:15,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:43:15,481 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 169 transitions. [2024-11-28 03:43:15,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 03:43:15,482 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:15,483 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:15,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:43:15,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:15,683 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:15,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:15,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1574024498, now seen corresponding path program 1 times [2024-11-28 03:43:15,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:15,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271424877] [2024-11-28 03:43:15,684 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:15,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:15,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:15,686 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:15,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:43:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:15,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:43:15,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 03:43:16,159 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:43:16,159 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:16,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271424877] [2024-11-28 03:43:16,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271424877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:16,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:16,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:43:16,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582970619] [2024-11-28 03:43:16,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:16,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:43:16,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:16,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:43:16,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:43:16,161 INFO L87 Difference]: Start difference. First operand 109 states and 169 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:43:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:16,406 INFO L93 Difference]: Finished difference Result 138 states and 200 transitions. [2024-11-28 03:43:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:43:16,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2024-11-28 03:43:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:16,408 INFO L225 Difference]: With dead ends: 138 [2024-11-28 03:43:16,408 INFO L226 Difference]: Without dead ends: 120 [2024-11-28 03:43:16,408 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:43:16,409 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 1 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:16,409 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 218 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:43:16,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-28 03:43:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-28 03:43:16,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 105 states have (on average 1.3333333333333333) internal successors, (140), 105 states have internal predecessors, (140), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-28 03:43:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 177 transitions. [2024-11-28 03:43:16,437 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 177 transitions. Word has length 49 [2024-11-28 03:43:16,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:16,437 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 177 transitions. [2024-11-28 03:43:16,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:43:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 177 transitions. [2024-11-28 03:43:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 03:43:16,441 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:16,441 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:16,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:43:16,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:16,642 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:16,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:16,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1835478928, now seen corresponding path program 1 times [2024-11-28 03:43:16,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:16,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378938848] [2024-11-28 03:43:16,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:16,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:16,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:16,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:16,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:43:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:16,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:43:16,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:43:17,135 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:43:17,135 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:17,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378938848] [2024-11-28 03:43:17,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378938848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:17,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:17,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:43:17,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530950008] [2024-11-28 03:43:17,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:17,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:43:17,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:17,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:43:17,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:43:17,137 INFO L87 Difference]: Start difference. First operand 120 states and 177 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:43:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:17,411 INFO L93 Difference]: Finished difference Result 168 states and 241 transitions. [2024-11-28 03:43:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:43:17,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2024-11-28 03:43:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:17,413 INFO L225 Difference]: With dead ends: 168 [2024-11-28 03:43:17,414 INFO L226 Difference]: Without dead ends: 123 [2024-11-28 03:43:17,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:43:17,415 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 0 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:17,416 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 281 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:43:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-28 03:43:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-11-28 03:43:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 108 states have (on average 1.3240740740740742) internal successors, (143), 107 states have internal predecessors, (143), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (25), 12 states have call predecessors, (25), 8 states have call successors, (25) [2024-11-28 03:43:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 177 transitions. [2024-11-28 03:43:17,434 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 177 transitions. Word has length 50 [2024-11-28 03:43:17,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:17,434 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 177 transitions. [2024-11-28 03:43:17,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:43:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 177 transitions. [2024-11-28 03:43:17,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 03:43:17,436 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:17,436 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:17,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 03:43:17,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:17,637 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:17,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:17,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1862759882, now seen corresponding path program 1 times [2024-11-28 03:43:17,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:17,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304392401] [2024-11-28 03:43:17,638 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:17,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:17,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:17,639 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:17,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:43:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:17,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:43:17,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:43:19,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:43:22,251 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:22,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304392401] [2024-11-28 03:43:22,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304392401] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:22,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:22,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-28 03:43:22,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551677348] [2024-11-28 03:43:22,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:22,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:43:22,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:22,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:43:22,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:43:22,253 INFO L87 Difference]: Start difference. First operand 123 states and 177 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 14 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:43:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:30,741 INFO L93 Difference]: Finished difference Result 236 states and 391 transitions. [2024-11-28 03:43:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 03:43:30,742 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 14 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2024-11-28 03:43:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:30,744 INFO L225 Difference]: With dead ends: 236 [2024-11-28 03:43:30,744 INFO L226 Difference]: Without dead ends: 215 [2024-11-28 03:43:30,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2024-11-28 03:43:30,746 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 75 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:30,747 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 822 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-28 03:43:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-28 03:43:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 133. [2024-11-28 03:43:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 115 states have (on average 1.3217391304347825) internal successors, (152), 115 states have internal predecessors, (152), 11 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (41), 14 states have call predecessors, (41), 10 states have call successors, (41) [2024-11-28 03:43:30,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 204 transitions. [2024-11-28 03:43:30,767 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 204 transitions. Word has length 50 [2024-11-28 03:43:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:30,768 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 204 transitions. [2024-11-28 03:43:30,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 14 states have internal predecessors, (52), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:43:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 204 transitions. [2024-11-28 03:43:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 03:43:30,770 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:30,770 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:30,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:43:30,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:30,970 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:30,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:30,971 INFO L85 PathProgramCache]: Analyzing trace with hash 110748472, now seen corresponding path program 1 times [2024-11-28 03:43:30,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:30,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454105971] [2024-11-28 03:43:30,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:30,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:30,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:30,973 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:30,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:43:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:31,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:43:31,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:43:31,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:43:32,131 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:32,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454105971] [2024-11-28 03:43:32,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454105971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:32,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:32,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-28 03:43:32,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560653429] [2024-11-28 03:43:32,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:32,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:43:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:32,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:43:32,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:43:32,133 INFO L87 Difference]: Start difference. First operand 133 states and 204 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:43:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:33,203 INFO L93 Difference]: Finished difference Result 272 states and 422 transitions. [2024-11-28 03:43:33,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:43:33,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 51 [2024-11-28 03:43:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:33,206 INFO L225 Difference]: With dead ends: 272 [2024-11-28 03:43:33,206 INFO L226 Difference]: Without dead ends: 151 [2024-11-28 03:43:33,207 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:43:33,208 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:33,208 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 214 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:43:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-28 03:43:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 142. [2024-11-28 03:43:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 123 states have (on average 1.3495934959349594) internal successors, (166), 124 states have internal predecessors, (166), 11 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (49), 14 states have call predecessors, (49), 10 states have call successors, (49) [2024-11-28 03:43:33,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 226 transitions. [2024-11-28 03:43:33,237 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 226 transitions. Word has length 51 [2024-11-28 03:43:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:33,238 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 226 transitions. [2024-11-28 03:43:33,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:43:33,238 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 226 transitions. [2024-11-28 03:43:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 03:43:33,240 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:33,240 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:33,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:43:33,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:33,440 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:33,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash -113107662, now seen corresponding path program 1 times [2024-11-28 03:43:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:33,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512135534] [2024-11-28 03:43:33,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:33,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:33,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:33,443 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:33,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:43:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:33,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:43:33,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:43:35,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:43:38,530 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:38,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512135534] [2024-11-28 03:43:38,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512135534] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:38,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:38,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-28 03:43:38,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392771089] [2024-11-28 03:43:38,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:38,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:43:38,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:38,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:43:38,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:43:38,532 INFO L87 Difference]: Start difference. First operand 142 states and 226 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:43:44,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:44,829 INFO L93 Difference]: Finished difference Result 258 states and 463 transitions. [2024-11-28 03:43:44,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:43:44,830 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2024-11-28 03:43:44,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:44,833 INFO L225 Difference]: With dead ends: 258 [2024-11-28 03:43:44,833 INFO L226 Difference]: Without dead ends: 237 [2024-11-28 03:43:44,834 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:43:44,834 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 68 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:44,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 872 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-28 03:43:44,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-28 03:43:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 147. [2024-11-28 03:43:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 128 states have (on average 1.375) internal successors, (176), 129 states have internal predecessors, (176), 11 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (49), 14 states have call predecessors, (49), 10 states have call successors, (49) [2024-11-28 03:43:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 236 transitions. [2024-11-28 03:43:44,862 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 236 transitions. Word has length 52 [2024-11-28 03:43:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:44,862 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 236 transitions. [2024-11-28 03:43:44,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:43:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 236 transitions. [2024-11-28 03:43:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 03:43:44,864 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:44,865 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:44,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:43:45,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:45,065 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:45,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:45,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1389274316, now seen corresponding path program 1 times [2024-11-28 03:43:45,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:45,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615987949] [2024-11-28 03:43:45,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:45,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:45,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:45,068 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:45,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:43:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:45,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:43:45,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 03:43:46,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 03:43:47,976 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:47,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615987949] [2024-11-28 03:43:47,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615987949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:47,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:47,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-28 03:43:47,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192365033] [2024-11-28 03:43:47,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:47,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:43:47,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:47,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:43:47,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:43:47,978 INFO L87 Difference]: Start difference. First operand 147 states and 236 transitions. Second operand has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:43:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:49,079 INFO L93 Difference]: Finished difference Result 184 states and 283 transitions. [2024-11-28 03:43:49,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:43:49,080 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 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 53 [2024-11-28 03:43:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:49,082 INFO L225 Difference]: With dead ends: 184 [2024-11-28 03:43:49,082 INFO L226 Difference]: Without dead ends: 152 [2024-11-28 03:43:49,082 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:43:49,083 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 48 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:49,083 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 613 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:43:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-28 03:43:49,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2024-11-28 03:43:49,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 132 states have (on average 1.3636363636363635) internal successors, (180), 131 states have internal predecessors, (180), 11 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (49), 16 states have call predecessors, (49), 10 states have call successors, (49) [2024-11-28 03:43:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 240 transitions. [2024-11-28 03:43:49,104 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 240 transitions. Word has length 53 [2024-11-28 03:43:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:49,104 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 240 transitions. [2024-11-28 03:43:49,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:43:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 240 transitions. [2024-11-28 03:43:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 03:43:49,106 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:49,106 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:49,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:43:49,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:49,310 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:49,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:49,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1884624626, now seen corresponding path program 1 times [2024-11-28 03:43:49,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:49,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728172797] [2024-11-28 03:43:49,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:49,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:49,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:49,313 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:49,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:43:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:49,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:43:49,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 03:43:50,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 03:43:50,403 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:50,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728172797] [2024-11-28 03:43:50,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728172797] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:50,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:50,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-28 03:43:50,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650116191] [2024-11-28 03:43:50,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:50,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:43:50,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:50,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:43:50,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:43:50,405 INFO L87 Difference]: Start difference. First operand 151 states and 240 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:43:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:51,164 INFO L93 Difference]: Finished difference Result 160 states and 248 transitions. [2024-11-28 03:43:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:43:51,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-11-28 03:43:51,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:51,166 INFO L225 Difference]: With dead ends: 160 [2024-11-28 03:43:51,166 INFO L226 Difference]: Without dead ends: 114 [2024-11-28 03:43:51,166 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:43:51,167 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:51,167 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 392 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:43:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-28 03:43:51,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-28 03:43:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 97 states have (on average 1.3814432989690721) internal successors, (134), 100 states have internal predecessors, (134), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 10 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-28 03:43:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 175 transitions. [2024-11-28 03:43:51,184 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 175 transitions. Word has length 53 [2024-11-28 03:43:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:51,184 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 175 transitions. [2024-11-28 03:43:51,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:43:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 175 transitions. [2024-11-28 03:43:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 03:43:51,186 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:51,187 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:51,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:43:51,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:51,387 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:51,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:51,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2061605462, now seen corresponding path program 2 times [2024-11-28 03:43:51,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:51,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279206531] [2024-11-28 03:43:51,388 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:43:51,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:51,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:51,390 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:51,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:43:51,439 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:43:51,439 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:43:51,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:43:51,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 03:43:51,810 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:43:51,810 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:51,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279206531] [2024-11-28 03:43:51,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279206531] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:43:51,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:43:51,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:43:51,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158869164] [2024-11-28 03:43:51,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:43:51,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:43:51,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:51,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:43:51,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:43:51,811 INFO L87 Difference]: Start difference. First operand 114 states and 175 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:43:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:52,172 INFO L93 Difference]: Finished difference Result 136 states and 201 transitions. [2024-11-28 03:43:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:43:52,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2024-11-28 03:43:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:52,175 INFO L225 Difference]: With dead ends: 136 [2024-11-28 03:43:52,175 INFO L226 Difference]: Without dead ends: 120 [2024-11-28 03:43:52,175 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:43:52,176 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:52,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 295 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:43:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-28 03:43:52,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-28 03:43:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 104 states have internal predecessors, (142), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (32), 12 states have call predecessors, (32), 8 states have call successors, (32) [2024-11-28 03:43:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 183 transitions. [2024-11-28 03:43:52,193 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 183 transitions. Word has length 53 [2024-11-28 03:43:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:52,193 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 183 transitions. [2024-11-28 03:43:52,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:43:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 183 transitions. [2024-11-28 03:43:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 03:43:52,195 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:52,195 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:52,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 03:43:52,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:52,396 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:52,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:52,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1474799448, now seen corresponding path program 1 times [2024-11-28 03:43:52,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:52,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977725104] [2024-11-28 03:43:52,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:43:52,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:52,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:52,398 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:52,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:43:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:43:52,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:43:52,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 03:43:53,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 03:43:54,410 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:54,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977725104] [2024-11-28 03:43:54,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977725104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:54,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:54,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-28 03:43:54,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136024700] [2024-11-28 03:43:54,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:54,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:43:54,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:54,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:43:54,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:43:54,412 INFO L87 Difference]: Start difference. First operand 120 states and 183 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:43:55,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:43:55,672 INFO L93 Difference]: Finished difference Result 229 states and 342 transitions. [2024-11-28 03:43:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:43:55,673 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 53 [2024-11-28 03:43:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:43:55,674 INFO L225 Difference]: With dead ends: 229 [2024-11-28 03:43:55,674 INFO L226 Difference]: Without dead ends: 185 [2024-11-28 03:43:55,675 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:43:55,675 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 58 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:43:55,676 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 786 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 03:43:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-28 03:43:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 150. [2024-11-28 03:43:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 130 states have (on average 1.3923076923076922) internal successors, (181), 127 states have internal predecessors, (181), 12 states have call successors, (12), 3 states have call predecessors, (12), 7 states have return successors, (47), 19 states have call predecessors, (47), 11 states have call successors, (47) [2024-11-28 03:43:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 240 transitions. [2024-11-28 03:43:55,696 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 240 transitions. Word has length 53 [2024-11-28 03:43:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:43:55,697 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 240 transitions. [2024-11-28 03:43:55,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:43:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 240 transitions. [2024-11-28 03:43:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 03:43:55,699 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:43:55,699 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:43:55,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 03:43:55,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:55,900 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:43:55,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:43:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1143048730, now seen corresponding path program 3 times [2024-11-28 03:43:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:43:55,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62070649] [2024-11-28 03:43:55,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:43:55,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:43:55,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:43:55,902 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:43:55,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:43:55,966 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:43:55,966 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:43:55,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:43:55,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:43:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:43:57,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:43:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:43:59,469 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:43:59,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62070649] [2024-11-28 03:43:59,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62070649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:43:59,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:43:59,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-28 03:43:59,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908646139] [2024-11-28 03:43:59,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:43:59,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:43:59,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:43:59,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:43:59,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:43:59,471 INFO L87 Difference]: Start difference. First operand 150 states and 240 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:44:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:44:05,837 INFO L93 Difference]: Finished difference Result 264 states and 445 transitions. [2024-11-28 03:44:05,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:44:05,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2024-11-28 03:44:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:44:05,840 INFO L225 Difference]: With dead ends: 264 [2024-11-28 03:44:05,841 INFO L226 Difference]: Without dead ends: 245 [2024-11-28 03:44:05,842 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:44:05,842 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 70 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:44:05,843 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 569 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-28 03:44:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-28 03:44:05,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 155. [2024-11-28 03:44:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 131 states have (on average 1.3740458015267176) internal successors, (180), 131 states have internal predecessors, (180), 15 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (72), 20 states have call predecessors, (72), 14 states have call successors, (72) [2024-11-28 03:44:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 267 transitions. [2024-11-28 03:44:05,866 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 267 transitions. Word has length 53 [2024-11-28 03:44:05,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:44:05,867 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 267 transitions. [2024-11-28 03:44:05,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:44:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 267 transitions. [2024-11-28 03:44:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 03:44:05,868 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:44:05,868 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:05,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 03:44:06,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:06,069 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:44:06,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:06,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1617015324, now seen corresponding path program 2 times [2024-11-28 03:44:06,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:44:06,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447085135] [2024-11-28 03:44:06,070 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:44:06,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:06,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:06,072 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:06,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:44:06,124 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:44:06,124 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:06,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:44:06,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 03:44:06,452 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:44:06,452 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:44:06,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447085135] [2024-11-28 03:44:06,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447085135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:44:06,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:44:06,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:44:06,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108036089] [2024-11-28 03:44:06,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:44:06,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:44:06,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:44:06,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:44:06,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:44:06,454 INFO L87 Difference]: Start difference. First operand 155 states and 267 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:44:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:44:06,856 INFO L93 Difference]: Finished difference Result 174 states and 287 transitions. [2024-11-28 03:44:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:44:06,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2024-11-28 03:44:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:44:06,858 INFO L225 Difference]: With dead ends: 174 [2024-11-28 03:44:06,858 INFO L226 Difference]: Without dead ends: 158 [2024-11-28 03:44:06,859 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:44:06,859 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:44:06,859 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 228 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:44:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-28 03:44:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2024-11-28 03:44:06,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 130 states have (on average 1.3692307692307693) internal successors, (178), 130 states have internal predecessors, (178), 15 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (72), 20 states have call predecessors, (72), 14 states have call successors, (72) [2024-11-28 03:44:06,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 265 transitions. [2024-11-28 03:44:06,892 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 265 transitions. Word has length 53 [2024-11-28 03:44:06,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:44:06,892 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 265 transitions. [2024-11-28 03:44:06,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:44:06,892 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 265 transitions. [2024-11-28 03:44:06,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 03:44:06,894 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:44:06,894 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:06,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 03:44:07,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:07,095 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:44:07,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1915623849, now seen corresponding path program 1 times [2024-11-28 03:44:07,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:44:07,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889106734] [2024-11-28 03:44:07,095 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:44:07,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:07,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:07,098 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:07,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:44:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:44:07,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:44:07,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:44:09,446 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:44:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:44:13,372 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:44:13,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889106734] [2024-11-28 03:44:13,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889106734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:13,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:44:13,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2024-11-28 03:44:13,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244219103] [2024-11-28 03:44:13,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:13,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:44:13,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:44:13,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:44:13,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:44:13,375 INFO L87 Difference]: Start difference. First operand 154 states and 265 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 18 states have internal predecessors, (58), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:44:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:44:27,098 INFO L93 Difference]: Finished difference Result 283 states and 535 transitions. [2024-11-28 03:44:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 03:44:27,100 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 18 states have internal predecessors, (58), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2024-11-28 03:44:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:44:27,103 INFO L225 Difference]: With dead ends: 283 [2024-11-28 03:44:27,103 INFO L226 Difference]: Without dead ends: 262 [2024-11-28 03:44:27,104 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 03:44:27,105 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 128 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:44:27,105 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 816 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2024-11-28 03:44:27,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-28 03:44:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 157. [2024-11-28 03:44:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 133 states have internal predecessors, (184), 15 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (72), 20 states have call predecessors, (72), 14 states have call successors, (72) [2024-11-28 03:44:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 271 transitions. [2024-11-28 03:44:27,129 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 271 transitions. Word has length 53 [2024-11-28 03:44:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:44:27,129 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 271 transitions. [2024-11-28 03:44:27,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 18 states have internal predecessors, (58), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:44:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 271 transitions. [2024-11-28 03:44:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 03:44:27,132 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:44:27,132 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:27,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 03:44:27,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:27,336 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:44:27,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:27,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1267341752, now seen corresponding path program 1 times [2024-11-28 03:44:27,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:44:27,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868194348] [2024-11-28 03:44:27,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:44:27,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:27,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:27,339 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:27,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:44:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:44:27,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:44:27,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:44:29,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:44:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:44:31,861 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:44:31,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868194348] [2024-11-28 03:44:31,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868194348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:31,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:44:31,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-28 03:44:31,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730351971] [2024-11-28 03:44:31,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:31,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:44:31,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:44:31,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:44:31,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:44:31,863 INFO L87 Difference]: Start difference. First operand 157 states and 271 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 14 states have internal predecessors, (55), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:44:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:44:40,282 INFO L93 Difference]: Finished difference Result 321 states and 628 transitions. [2024-11-28 03:44:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 03:44:40,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 14 states have internal predecessors, (55), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2024-11-28 03:44:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:44:40,286 INFO L225 Difference]: With dead ends: 321 [2024-11-28 03:44:40,286 INFO L226 Difference]: Without dead ends: 308 [2024-11-28 03:44:40,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 03:44:40,288 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 126 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:44:40,288 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 638 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-28 03:44:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-28 03:44:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 203. [2024-11-28 03:44:40,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 171 states have (on average 1.3625730994152048) internal successors, (233), 171 states have internal predecessors, (233), 21 states have call successors, (21), 3 states have call predecessors, (21), 10 states have return successors, (146), 28 states have call predecessors, (146), 20 states have call successors, (146) [2024-11-28 03:44:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 400 transitions. [2024-11-28 03:44:40,321 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 400 transitions. Word has length 54 [2024-11-28 03:44:40,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:44:40,321 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 400 transitions. [2024-11-28 03:44:40,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 14 states have internal predecessors, (55), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:44:40,322 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 400 transitions. [2024-11-28 03:44:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 03:44:40,324 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:44:40,324 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:40,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 03:44:40,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:40,525 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:44:40,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:40,525 INFO L85 PathProgramCache]: Analyzing trace with hash -457995126, now seen corresponding path program 1 times [2024-11-28 03:44:40,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:44:40,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765306686] [2024-11-28 03:44:40,526 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:44:40,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:40,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:40,528 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:40,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:44:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:44:40,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:44:40,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 03:44:40,748 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:44:40,748 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:44:40,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765306686] [2024-11-28 03:44:40,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765306686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:44:40,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:44:40,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:44:40,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947032639] [2024-11-28 03:44:40,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:44:40,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:44:40,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:44:40,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:44:40,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:44:40,750 INFO L87 Difference]: Start difference. First operand 203 states and 400 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:44:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:44:40,863 INFO L93 Difference]: Finished difference Result 216 states and 413 transitions. [2024-11-28 03:44:40,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:44:40,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 54 [2024-11-28 03:44:40,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:44:40,865 INFO L225 Difference]: With dead ends: 216 [2024-11-28 03:44:40,866 INFO L226 Difference]: Without dead ends: 177 [2024-11-28 03:44:40,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:44:40,868 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 0 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:44:40,868 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 176 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:44:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-28 03:44:40,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 151. [2024-11-28 03:44:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 119 states have (on average 1.319327731092437) internal successors, (157), 123 states have internal predecessors, (157), 21 states have call successors, (21), 3 states have call predecessors, (21), 10 states have return successors, (134), 24 states have call predecessors, (134), 20 states have call successors, (134) [2024-11-28 03:44:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 312 transitions. [2024-11-28 03:44:40,892 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 312 transitions. Word has length 54 [2024-11-28 03:44:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:44:40,892 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 312 transitions. [2024-11-28 03:44:40,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:44:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 312 transitions. [2024-11-28 03:44:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 03:44:40,895 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:44:40,895 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:40,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 03:44:41,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:41,096 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:44:41,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:41,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1438113164, now seen corresponding path program 2 times [2024-11-28 03:44:41,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:44:41,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068934889] [2024-11-28 03:44:41,097 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:44:41,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:41,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:41,098 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:41,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:44:41,151 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:44:41,151 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:41,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:44:41,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-28 03:44:41,439 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:44:41,439 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:44:41,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068934889] [2024-11-28 03:44:41,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068934889] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:44:41,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:44:41,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:44:41,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479885678] [2024-11-28 03:44:41,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:44:41,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:44:41,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:44:41,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:44:41,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:44:41,440 INFO L87 Difference]: Start difference. First operand 151 states and 312 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:44:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:44:41,701 INFO L93 Difference]: Finished difference Result 171 states and 332 transitions. [2024-11-28 03:44:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:44:41,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 54 [2024-11-28 03:44:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:44:41,704 INFO L225 Difference]: With dead ends: 171 [2024-11-28 03:44:41,704 INFO L226 Difference]: Without dead ends: 159 [2024-11-28 03:44:41,704 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:44:41,706 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:44:41,706 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 229 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 03:44:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-28 03:44:41,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2024-11-28 03:44:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 126 states have (on average 1.2777777777777777) internal successors, (161), 130 states have internal predecessors, (161), 21 states have call successors, (21), 3 states have call predecessors, (21), 10 states have return successors, (134), 24 states have call predecessors, (134), 20 states have call successors, (134) [2024-11-28 03:44:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 316 transitions. [2024-11-28 03:44:41,736 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 316 transitions. Word has length 54 [2024-11-28 03:44:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:44:41,736 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 316 transitions. [2024-11-28 03:44:41,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 03:44:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 316 transitions. [2024-11-28 03:44:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 03:44:41,740 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:44:41,740 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:41,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 03:44:41,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:41,941 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:44:41,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:41,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1686260354, now seen corresponding path program 2 times [2024-11-28 03:44:41,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:44:41,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934024036] [2024-11-28 03:44:41,942 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:44:41,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:41,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:41,943 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:41,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:44:42,008 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:44:42,008 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:44:42,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:44:42,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:44:43,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:44:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:44:45,749 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:44:45,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934024036] [2024-11-28 03:44:45,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934024036] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:45,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:44:45,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-11-28 03:44:45,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045667297] [2024-11-28 03:44:45,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:45,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:44:45,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:44:45,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:44:45,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:44:45,750 INFO L87 Difference]: Start difference. First operand 158 states and 316 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:44:52,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:44:52,031 INFO L93 Difference]: Finished difference Result 267 states and 501 transitions. [2024-11-28 03:44:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:44:52,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 55 [2024-11-28 03:44:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:44:52,034 INFO L225 Difference]: With dead ends: 267 [2024-11-28 03:44:52,035 INFO L226 Difference]: Without dead ends: 252 [2024-11-28 03:44:52,036 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:44:52,036 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 72 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:44:52,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 677 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-28 03:44:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-28 03:44:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 152. [2024-11-28 03:44:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 123 states have (on average 1.2845528455284554) internal successors, (158), 127 states have internal predecessors, (158), 18 states have call successors, (18), 3 states have call predecessors, (18), 10 states have return successors, (113), 21 states have call predecessors, (113), 17 states have call successors, (113) [2024-11-28 03:44:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 289 transitions. [2024-11-28 03:44:52,070 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 289 transitions. Word has length 55 [2024-11-28 03:44:52,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:44:52,070 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 289 transitions. [2024-11-28 03:44:52,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:44:52,071 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 289 transitions. [2024-11-28 03:44:52,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 03:44:52,073 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:44:52,073 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:52,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 03:44:52,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:52,274 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:44:52,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:52,274 INFO L85 PathProgramCache]: Analyzing trace with hash 495166849, now seen corresponding path program 1 times [2024-11-28 03:44:52,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:44:52,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36083734] [2024-11-28 03:44:52,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:44:52,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:52,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:52,276 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:52,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 03:44:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:44:52,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:44:52,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:44:52,747 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:44:52,747 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:44:52,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36083734] [2024-11-28 03:44:52,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36083734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:44:52,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:44:52,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:44:52,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738003597] [2024-11-28 03:44:52,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:44:52,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:44:52,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:44:52,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:44:52,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:44:52,749 INFO L87 Difference]: Start difference. First operand 152 states and 289 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:44:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:44:53,377 INFO L93 Difference]: Finished difference Result 270 states and 463 transitions. [2024-11-28 03:44:53,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:44:53,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-11-28 03:44:53,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:44:53,380 INFO L225 Difference]: With dead ends: 270 [2024-11-28 03:44:53,380 INFO L226 Difference]: Without dead ends: 159 [2024-11-28 03:44:53,381 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:44:53,382 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:44:53,382 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:44:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-28 03:44:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2024-11-28 03:44:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 126 states have (on average 1.2777777777777777) internal successors, (161), 131 states have internal predecessors, (161), 18 states have call successors, (18), 3 states have call predecessors, (18), 11 states have return successors, (128), 21 states have call predecessors, (128), 17 states have call successors, (128) [2024-11-28 03:44:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 307 transitions. [2024-11-28 03:44:53,411 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 307 transitions. Word has length 55 [2024-11-28 03:44:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:44:53,411 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 307 transitions. [2024-11-28 03:44:53,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:44:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 307 transitions. [2024-11-28 03:44:53,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 03:44:53,414 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:44:53,414 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:44:53,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 03:44:53,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:53,615 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:44:53,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:44:53,615 INFO L85 PathProgramCache]: Analyzing trace with hash -469885383, now seen corresponding path program 1 times [2024-11-28 03:44:53,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:44:53,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709990552] [2024-11-28 03:44:53,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:44:53,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:44:53,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:44:53,617 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:44:53,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 03:44:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:44:53,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:44:53,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:44:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:44:55,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:44:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:44:58,695 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:44:58,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709990552] [2024-11-28 03:44:58,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709990552] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:44:58,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:44:58,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2024-11-28 03:44:58,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768479016] [2024-11-28 03:44:58,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:44:58,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:44:58,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:44:58,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:44:58,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:44:58,697 INFO L87 Difference]: Start difference. First operand 156 states and 307 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:45:11,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:45:11,072 INFO L93 Difference]: Finished difference Result 283 states and 584 transitions. [2024-11-28 03:45:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 03:45:11,073 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 56 [2024-11-28 03:45:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:45:11,076 INFO L225 Difference]: With dead ends: 283 [2024-11-28 03:45:11,076 INFO L226 Difference]: Without dead ends: 268 [2024-11-28 03:45:11,078 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 03:45:11,079 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 118 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:45:11,079 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 924 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2024-11-28 03:45:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-11-28 03:45:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 146. [2024-11-28 03:45:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 120 states have (on average 1.2916666666666667) internal successors, (155), 124 states have internal predecessors, (155), 15 states have call successors, (15), 3 states have call predecessors, (15), 10 states have return successors, (95), 18 states have call predecessors, (95), 14 states have call successors, (95) [2024-11-28 03:45:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 265 transitions. [2024-11-28 03:45:11,118 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 265 transitions. Word has length 56 [2024-11-28 03:45:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:45:11,118 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 265 transitions. [2024-11-28 03:45:11,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:45:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 265 transitions. [2024-11-28 03:45:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 03:45:11,121 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:45:11,121 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2024-11-28 03:45:11,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 03:45:11,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:11,322 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:45:11,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2036817359, now seen corresponding path program 1 times [2024-11-28 03:45:11,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:45:11,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128080131] [2024-11-28 03:45:11,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:45:11,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:11,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:11,325 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:11,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 03:45:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:45:11,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:45:11,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:45:11,995 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:45:11,995 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:45:11,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128080131] [2024-11-28 03:45:11,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128080131] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:45:11,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:45:11,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:45:11,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98574813] [2024-11-28 03:45:11,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:45:11,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:45:11,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:45:11,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:45:11,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:45:11,996 INFO L87 Difference]: Start difference. First operand 146 states and 265 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:45:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:45:12,959 INFO L93 Difference]: Finished difference Result 267 states and 442 transitions. [2024-11-28 03:45:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:45:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-11-28 03:45:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:45:12,962 INFO L225 Difference]: With dead ends: 267 [2024-11-28 03:45:12,962 INFO L226 Difference]: Without dead ends: 156 [2024-11-28 03:45:12,963 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:45:12,963 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:45:12,964 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 201 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:45:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-28 03:45:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2024-11-28 03:45:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 120 states have (on average 1.2916666666666667) internal successors, (155), 124 states have internal predecessors, (155), 15 states have call successors, (15), 3 states have call predecessors, (15), 10 states have return successors, (95), 18 states have call predecessors, (95), 14 states have call successors, (95) [2024-11-28 03:45:12,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 265 transitions. [2024-11-28 03:45:12,991 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 265 transitions. Word has length 56 [2024-11-28 03:45:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:45:12,991 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 265 transitions. [2024-11-28 03:45:12,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:45:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 265 transitions. [2024-11-28 03:45:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 03:45:12,994 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:45:12,994 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:13,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 03:45:13,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:13,195 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:45:13,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:13,195 INFO L85 PathProgramCache]: Analyzing trace with hash -413109599, now seen corresponding path program 1 times [2024-11-28 03:45:13,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:45:13,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725723580] [2024-11-28 03:45:13,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:45:13,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:13,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:13,197 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:13,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 03:45:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:45:13,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:45:13,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-28 03:45:14,296 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:45:14,296 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:45:14,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725723580] [2024-11-28 03:45:14,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725723580] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:45:14,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:45:14,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:45:14,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963932191] [2024-11-28 03:45:14,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:45:14,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:45:14,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:45:14,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:45:14,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:45:14,298 INFO L87 Difference]: Start difference. First operand 146 states and 265 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:45:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:45:15,643 INFO L93 Difference]: Finished difference Result 177 states and 297 transitions. [2024-11-28 03:45:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:45:15,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2024-11-28 03:45:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:45:15,645 INFO L225 Difference]: With dead ends: 177 [2024-11-28 03:45:15,645 INFO L226 Difference]: Without dead ends: 156 [2024-11-28 03:45:15,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:45:15,646 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 19 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:45:15,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 567 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 03:45:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-28 03:45:15,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2024-11-28 03:45:15,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 118 states have (on average 1.2966101694915255) internal successors, (153), 122 states have internal predecessors, (153), 13 states have call successors, (13), 3 states have call predecessors, (13), 10 states have return successors, (78), 16 states have call predecessors, (78), 12 states have call successors, (78) [2024-11-28 03:45:15,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 244 transitions. [2024-11-28 03:45:15,672 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 244 transitions. Word has length 57 [2024-11-28 03:45:15,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:45:15,673 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 244 transitions. [2024-11-28 03:45:15,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:45:15,673 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 244 transitions. [2024-11-28 03:45:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 03:45:15,675 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:45:15,675 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:15,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 03:45:15,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:15,876 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:45:15,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1851614173, now seen corresponding path program 1 times [2024-11-28 03:45:15,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:45:15,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497477554] [2024-11-28 03:45:15,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:45:15,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:15,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:15,880 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:15,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 03:45:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:45:15,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 03:45:15,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:45:16,293 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:45:16,293 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:45:16,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497477554] [2024-11-28 03:45:16,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497477554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:45:16,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:45:16,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:45:16,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342546527] [2024-11-28 03:45:16,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:45:16,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:45:16,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:45:16,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:45:16,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:45:16,294 INFO L87 Difference]: Start difference. First operand 142 states and 244 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:45:16,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:45:16,759 INFO L93 Difference]: Finished difference Result 275 states and 438 transitions. [2024-11-28 03:45:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:45:16,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2024-11-28 03:45:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:45:16,761 INFO L225 Difference]: With dead ends: 275 [2024-11-28 03:45:16,761 INFO L226 Difference]: Without dead ends: 145 [2024-11-28 03:45:16,762 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:45:16,763 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:45:16,763 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 146 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:45:16,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-28 03:45:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 116. [2024-11-28 03:45:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 99 states have (on average 1.2828282828282829) internal successors, (127), 100 states have internal predecessors, (127), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (30), 12 states have call predecessors, (30), 8 states have call successors, (30) [2024-11-28 03:45:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 166 transitions. [2024-11-28 03:45:16,783 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 166 transitions. Word has length 57 [2024-11-28 03:45:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:45:16,784 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 166 transitions. [2024-11-28 03:45:16,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:45:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 166 transitions. [2024-11-28 03:45:16,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 03:45:16,785 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:45:16,785 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:16,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 03:45:16,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:16,990 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:45:16,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:16,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1498287313, now seen corresponding path program 2 times [2024-11-28 03:45:16,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:45:16,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437929629] [2024-11-28 03:45:16,991 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:45:16,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:16,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:16,992 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:16,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 03:45:17,057 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:45:17,058 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:17,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:45:17,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:45:18,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:45:20,418 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:45:20,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437929629] [2024-11-28 03:45:20,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437929629] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:20,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:45:20,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-28 03:45:20,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569964054] [2024-11-28 03:45:20,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:20,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:45:20,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:45:20,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:45:20,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:45:20,420 INFO L87 Difference]: Start difference. First operand 116 states and 166 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:45:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:45:24,148 INFO L93 Difference]: Finished difference Result 242 states and 343 transitions. [2024-11-28 03:45:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:45:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 57 [2024-11-28 03:45:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:45:24,151 INFO L225 Difference]: With dead ends: 242 [2024-11-28 03:45:24,151 INFO L226 Difference]: Without dead ends: 145 [2024-11-28 03:45:24,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:45:24,152 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 65 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:45:24,152 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 535 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 03:45:24,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-28 03:45:24,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 125. [2024-11-28 03:45:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 108 states have (on average 1.3425925925925926) internal successors, (145), 109 states have internal predecessors, (145), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (30), 12 states have call predecessors, (30), 8 states have call successors, (30) [2024-11-28 03:45:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 184 transitions. [2024-11-28 03:45:24,173 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 184 transitions. Word has length 57 [2024-11-28 03:45:24,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:45:24,173 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 184 transitions. [2024-11-28 03:45:24,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:45:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 184 transitions. [2024-11-28 03:45:24,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 03:45:24,174 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:45:24,174 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:24,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 03:45:24,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:24,375 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:45:24,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:24,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1134918380, now seen corresponding path program 1 times [2024-11-28 03:45:24,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:45:24,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903767301] [2024-11-28 03:45:24,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:45:24,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:24,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:24,377 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:24,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 03:45:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:45:24,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:45:24,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:45:25,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:45:27,231 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:45:27,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903767301] [2024-11-28 03:45:27,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903767301] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:27,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:45:27,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-28 03:45:27,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903192201] [2024-11-28 03:45:27,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:27,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:45:27,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:45:27,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:45:27,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:45:27,233 INFO L87 Difference]: Start difference. First operand 125 states and 184 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:45:30,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:45:30,148 INFO L93 Difference]: Finished difference Result 242 states and 336 transitions. [2024-11-28 03:45:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:45:30,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2024-11-28 03:45:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:45:30,149 INFO L225 Difference]: With dead ends: 242 [2024-11-28 03:45:30,150 INFO L226 Difference]: Without dead ends: 140 [2024-11-28 03:45:30,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:45:30,151 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 95 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:45:30,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 354 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 03:45:30,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-28 03:45:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2024-11-28 03:45:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 97 states have (on average 1.3711340206185567) internal successors, (133), 99 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-28 03:45:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 155 transitions. [2024-11-28 03:45:30,169 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 155 transitions. Word has length 58 [2024-11-28 03:45:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:45:30,169 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 155 transitions. [2024-11-28 03:45:30,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:45:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 155 transitions. [2024-11-28 03:45:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-28 03:45:30,170 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:45:30,171 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:30,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 03:45:30,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:30,371 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:45:30,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1441260235, now seen corresponding path program 2 times [2024-11-28 03:45:30,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:45:30,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073324314] [2024-11-28 03:45:30,372 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:45:30,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:45:30,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:30,374 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:45:30,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 03:45:30,440 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:45:30,440 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:45:30,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 03:45:30,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:45:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:45:34,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:45:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:45:41,360 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:45:41,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073324314] [2024-11-28 03:45:41,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073324314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:45:41,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:45:41,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2024-11-28 03:45:41,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611680633] [2024-11-28 03:45:41,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:45:41,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 03:45:41,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:45:41,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 03:45:41,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2024-11-28 03:45:41,362 INFO L87 Difference]: Start difference. First operand 110 states and 155 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 26 states have internal predecessors, (74), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:46:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:46:16,975 INFO L93 Difference]: Finished difference Result 280 states and 477 transitions. [2024-11-28 03:46:16,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-28 03:46:16,976 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 26 states have internal predecessors, (74), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 61 [2024-11-28 03:46:16,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:46:16,978 INFO L225 Difference]: With dead ends: 280 [2024-11-28 03:46:16,978 INFO L226 Difference]: Without dead ends: 259 [2024-11-28 03:46:16,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=1007, Invalid=5155, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 03:46:16,981 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 302 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:46:16,981 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1501 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time] [2024-11-28 03:46:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-28 03:46:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 127. [2024-11-28 03:46:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 110 states have (on average 1.3909090909090909) internal successors, (153), 113 states have internal predecessors, (153), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (30), 10 states have call predecessors, (30), 8 states have call successors, (30) [2024-11-28 03:46:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 192 transitions. [2024-11-28 03:46:17,007 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 192 transitions. Word has length 61 [2024-11-28 03:46:17,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:46:17,008 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 192 transitions. [2024-11-28 03:46:17,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 26 states have internal predecessors, (74), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:46:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 192 transitions. [2024-11-28 03:46:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 03:46:17,009 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:46:17,009 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:46:17,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 03:46:17,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:46:17,210 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:46:17,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:46:17,210 INFO L85 PathProgramCache]: Analyzing trace with hash 445340997, now seen corresponding path program 2 times [2024-11-28 03:46:17,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:46:17,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949038716] [2024-11-28 03:46:17,210 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:46:17,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:46:17,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:46:17,214 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:46:17,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 03:46:17,286 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:46:17,286 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:46:17,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:46:17,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:46:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:46:20,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:46:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:46:26,545 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:46:26,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949038716] [2024-11-28 03:46:26,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949038716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:46:26,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:46:26,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2024-11-28 03:46:26,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532563982] [2024-11-28 03:46:26,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:46:26,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:46:26,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:46:26,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:46:26,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:46:26,547 INFO L87 Difference]: Start difference. First operand 127 states and 192 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 26 states have internal predecessors, (73), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:46:48,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:46:48,014 INFO L93 Difference]: Finished difference Result 274 states and 407 transitions. [2024-11-28 03:46:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-28 03:46:48,015 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 26 states have internal predecessors, (73), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2024-11-28 03:46:48,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:46:48,017 INFO L225 Difference]: With dead ends: 274 [2024-11-28 03:46:48,017 INFO L226 Difference]: Without dead ends: 259 [2024-11-28 03:46:48,019 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=473, Invalid=1977, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 03:46:48,020 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 380 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:46:48,020 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1189 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2024-11-28 03:46:48,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-28 03:46:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 132. [2024-11-28 03:46:48,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 115 states have (on average 1.382608695652174) internal successors, (159), 116 states have internal predecessors, (159), 9 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (30), 12 states have call predecessors, (30), 8 states have call successors, (30) [2024-11-28 03:46:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 198 transitions. [2024-11-28 03:46:48,045 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 198 transitions. Word has length 64 [2024-11-28 03:46:48,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:46:48,045 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 198 transitions. [2024-11-28 03:46:48,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 26 states have internal predecessors, (73), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:46:48,045 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 198 transitions. [2024-11-28 03:46:48,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 03:46:48,046 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:46:48,046 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 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, 1, 1] [2024-11-28 03:46:48,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 03:46:48,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:46:48,247 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:46:48,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:46:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2070662880, now seen corresponding path program 2 times [2024-11-28 03:46:48,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:46:48,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189106984] [2024-11-28 03:46:48,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:46:48,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:46:48,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:46:48,249 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:46:48,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 03:46:48,322 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:46:48,323 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:46:48,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:46:48,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:46:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-28 03:46:49,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:46:49,934 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:46:49,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189106984] [2024-11-28 03:46:49,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189106984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:46:49,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2093009665] [2024-11-28 03:46:49,934 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:46:49,934 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 03:46:49,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 03:46:49,938 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 03:46:49,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2024-11-28 03:46:50,118 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:46:50,118 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:46:50,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:46:50,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:46:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:46:52,366 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:46:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-28 03:46:56,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2093009665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:46:56,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:46:56,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2024-11-28 03:46:56,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162120278] [2024-11-28 03:46:56,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:46:56,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:46:56,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:46:56,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:46:56,172 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:46:56,172 INFO L87 Difference]: Start difference. First operand 132 states and 198 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-28 03:47:10,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:47:10,541 INFO L93 Difference]: Finished difference Result 294 states and 412 transitions. [2024-11-28 03:47:10,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 03:47:10,541 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 66 [2024-11-28 03:47:10,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:47:10,542 INFO L225 Difference]: With dead ends: 294 [2024-11-28 03:47:10,542 INFO L226 Difference]: Without dead ends: 185 [2024-11-28 03:47:10,543 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=432, Invalid=1638, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 03:47:10,544 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 285 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:47:10,544 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 826 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2024-11-28 03:47:10,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-28 03:47:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 117. [2024-11-28 03:47:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 104 states have (on average 1.4038461538461537) internal successors, (146), 106 states have internal predecessors, (146), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-28 03:47:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 168 transitions. [2024-11-28 03:47:10,559 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 168 transitions. Word has length 66 [2024-11-28 03:47:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:47:10,559 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 168 transitions. [2024-11-28 03:47:10,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-28 03:47:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 168 transitions. [2024-11-28 03:47:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-28 03:47:10,559 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:47:10,560 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:47:10,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2024-11-28 03:47:10,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-28 03:47:10,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:47:10,960 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:47:10,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:47:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1716175709, now seen corresponding path program 3 times [2024-11-28 03:47:10,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:47:10,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147844762] [2024-11-28 03:47:10,961 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:47:10,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:47:10,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:47:10,964 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:47:10,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 03:47:11,066 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-28 03:47:11,066 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:47:11,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:47:11,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:47:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:47:13,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:47:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:47:19,954 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:47:19,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147844762] [2024-11-28 03:47:19,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147844762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:47:19,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:47:19,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2024-11-28 03:47:19,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012585638] [2024-11-28 03:47:19,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:47:19,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 03:47:19,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:47:19,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 03:47:19,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:47:19,956 INFO L87 Difference]: Start difference. First operand 117 states and 168 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:47:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:47:32,189 INFO L93 Difference]: Finished difference Result 275 states and 397 transitions. [2024-11-28 03:47:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 03:47:32,191 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2024-11-28 03:47:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:47:32,192 INFO L225 Difference]: With dead ends: 275 [2024-11-28 03:47:32,192 INFO L226 Difference]: Without dead ends: 166 [2024-11-28 03:47:32,193 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=453, Invalid=807, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:47:32,193 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 198 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:47:32,194 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 909 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-28 03:47:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-28 03:47:32,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2024-11-28 03:47:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 121 states have (on average 1.487603305785124) internal successors, (180), 123 states have internal predecessors, (180), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-28 03:47:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 202 transitions. [2024-11-28 03:47:32,229 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 202 transitions. Word has length 69 [2024-11-28 03:47:32,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:47:32,229 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 202 transitions. [2024-11-28 03:47:32,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:47:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 202 transitions. [2024-11-28 03:47:32,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-28 03:47:32,230 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:47:32,230 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:47:32,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 03:47:32,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:47:32,431 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:47:32,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:47:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2032484429, now seen corresponding path program 3 times [2024-11-28 03:47:32,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:47:32,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091059112] [2024-11-28 03:47:32,432 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:47:32,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:47:32,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:47:32,435 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:47:32,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f34b8802-907d-45a8-ab01-41161847c6d1/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 03:47:32,572 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-28 03:47:32,572 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:47:32,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 03:47:32,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:47:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 10 proven. 191 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:47:39,715 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:47:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 10 proven. 191 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:47:54,998 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:47:54,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091059112] [2024-11-28 03:47:54,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091059112] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:47:54,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:47:54,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2024-11-28 03:47:54,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257493693] [2024-11-28 03:47:54,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:47:54,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-28 03:47:54,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:47:55,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-28 03:47:55,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 03:47:55,001 INFO L87 Difference]: Start difference. First operand 134 states and 202 transitions. Second operand has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 42 states have internal predecessors, (106), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7)